VTechWorks Repository :: Browsing by Author "Winett, Richard A."

Browsing by Author "Winett, Richard A."

Now showing 1 - 20 of 157

The A.R.K. Project: A Grassroots, Student-Led, Multiple-Component Intervention to Increase Driver Safety-Belt Use on a University Campus
Farrell, Leah (Virginia Tech, 2006-02-27)
This study represents a collaborative effort among university academics and community stakeholders. Virginia Tech's (VT) Center for Applied Behavior Systems (CABS) teamed up with student groups following the death of a fellow student to create The A.R.K. Project. This multiple-component intervention study specifically targeted students on the VT campus, in an attempt to increase driver safety-belt use. Observations on VT students' safety-belt use and other safety-related behaviors (i.e., turn-signal use and cell-phone use) were made during pre-intervention, intervention, post-intervention, and follow-up study phases and compared with observations made on drivers in two non-equivalent control groups (VT faculty/staff and Radford University (RU) students). Evaluation of the project revealed no meaningful changes in daily percentages of VT student safety-belt use, when compared to that of non-equivalent control groups. Percentages by phase did vary in the hypothesized direction for VT students. Percentages by phase varied in similar ways for VT faculty/staff, suggesting the student-targeted intervention, over-all, was not responsible for the observed changes. However, one inter-personal intervention component, the Buckle-Up Flashcards prompt was associated with a particularly successful rate of compliance. Thirty percent of un-buckled drivers complied with this inter-personal response. Because VT student safety-belt use did not change as a function of the intervention, it was irrelevant to investigate response generalization to other safety-related behaviors. Instead, the author focused on covariation between safety-belt use, turn-signal use, and cell-phone use. Buckled drivers were significantly more likely to indicate turns with a turn signal and were significantly less likely to use cell phones. Other additional findings of epidemiologic importance were that safety-belt use was significantly more likely among VT faculty/staff than VT students and safety-belt use was significantly more likely among VT faculty/staff and VT student females than among VT faculty/staff and VT student males. Interpretations of these findings and directions for future research are discussed.
Adult Cancer Survivorship: An Evaluation of Survivorship Care Planning and Follow-Up
Kelleher, Sarah A. (Virginia Tech, 2014-05-05)
Over 1 million Americans are diagnosed with cancer in a given year and currently there are approximately 12 million cancer survivors in the United States. With improved detection strategies and medical advances, the number of cancer survivors continues to rise, making survivorship care an increasingly important phase along the continuum of cancer care. The purpose of the current study was to investigate the emerging field of survivorship care, including care planning and follow-up, in survivors of different types of cancer. We quantitatively evaluated the post-treatment care received by 123 cancer survivors, including the use of survivorship care plans and the impact of these care plans and subsequent follow-up on a variety of behavioral health outcomes. We qualitatively assessed survivorship care providers' (n = 8) perspectives on comprehensive survivorship care and experiences delivering post-treatment services. The majority of participants (54%) are receiving a moderate level of survivorship care, including minimal receipt of a written care plan (31%) and some amount of referrals for mental health, diet, and physical activity (28%). Results suggest significantly lower general psychological distress (F [1, 104] = 8.316, p = .005) and higher coping self-efficacy (F [1, 104] = 6.627, p = .011) for those who received some form of written care plan versus those who did not. These results imply that written care plan documents have the potential to lead to higher psychosocial functioning for survivors of cancer. The qualitative data provide initial evidence supporting the value of SCPs for patients and providers. Critical barriers to implementation of comprehensive survivorship care and SCPs, from the providers' perspective, include the fragmented healthcare system and resources. The current study is an important step toward increasing knowledge of and potential intervention targets to improve cancer survivorship experiences – from both the patients' and providers' perspectives. Future directions include developing a standardized system for delivering survivorship care and SCPs, and increasing the evidence base to examine the impact of SCPs on short- and long-term patient-reported and clinical outcomes, increase the focus on patient-centered care, and explore the impact of SCPs delivered to vulnerable groups of survivors.
Aging and the Social Cognitive Determinants of Physical Activity Behavior and Behavior Change: Evidence from the Guide to Health Trial
Anderson-Bill, Eileen Smith; Winett, Richard A.; Wojcik, Janet R.; Williams, David M. (Hindawi, 2011-04-28)
Part one of this study investigated the effect of aging on social-cognitive characteristics related to physical activity (PA) among adults in the baseline phase of a health promotion intervention. Participants' questionnaire responses and activity logs indicated PA levels and self-efficacy declined with age, while social support and the use of self-regulatory behaviors (e.g., goal setting, planning, and keeping track) increased. With age participants were also less likely to expect PA to interfere with their daily routines and social obligations. Part two of the study was among overweight/obese, inactive participants completing the intervention; it examined whether improvements in psychosocial variables might counteract declining PA associated with age. After treatment, participants were more active and decreased body weight regardless of age, and improved self-efficacy, outcome expectations, and self-regulatory behaviors. In a causal model, increases in self-efficacy at 7-months lead to increased PA levels and, albeit marginally, weight loss at 16 months; increased PA was associated with greater weight loss. Aging adults who were more confident exercised more and as a result lost more weight. This longitudinal study suggests interventions that offset the effect of aging on self-efficacy may be more successful in helping older participants become more active and avoid weight gain.
Aging, Physical Activity, and Energy Intake Regulation
Van Walleghen, Emily Lynn (Virginia Tech, 2006-07-31)
More than seventy percent of Americans over the age of sixty are classified as overweight or obese, and the future incidence of these conditions is expected to rise. Although it is unclear why older adults are predisposed to weight gain, decreased total energy expenditure may contribute to positive energy balance. It is also possible that age-related impairments in energy intake regulation result in the inability to appropriately adjust food intake to meet energy requirements with advancing age. The purpose of these investigations was to determine the influence of age and habitual physical activity on acute regulation of energy intake. Secondary objectives were to determine if there are sex differences in energy intake regulation, and to determine if pre-meal water consumption decreases meal energy intake in young and older adults. To achieve these objectives, the ability to spontaneously adjust energy intake at a meal under "preloading" conditions in which a yogurt shake or water was consumed prior to the meal was determined. We hypothesized that older adults would demonstrate less accurate energy intake regulation than younger adults, but that energy intake dysregulation would be attenuated in physically active older adults. We also expected that young men would have higher accuracy of energy intake regulation compared to young women matched for dietary cognitive restraint and cardiorespiratory fitness, and that pre-meal water consumption would decrease meal energy intake in young and older adults. Our main finding was that energy intake regulation is significantly impaired in older compared to younger adults, and that habitual physical activity improves short-term, but not acute, energy intake regulation. We also found that young men demonstrate significantly higher accuracy of energy intake regulation compared to young women. Lastly, we determined that pre-meal water consumption significantly decreases meal energy intake in older, but not young, adults. Overall, these results indicate that acute energy intake regulation is less accurate with advancing age, but that regular physical activity improves short-term energy intake regulation. Additionally, sex appears to influence energy intake regulation, and water consumption is a potential strategy to reduce energy intake in older adults.
Aging, resistance training, and diabetes prevention
Flack, Kyle D.; Davy, Kevin P.; Hulver, Matthew W.; Winett, Richard A.; Frisard, Madlyn I.; Davy, Brenda M. (2010-12-15)
With the aging of the baby-boom generation and increases in life expectancy, the American population is growing older. Aging is associated with adverse changes in glucose tolerance and increased risk of diabetes; the increasing prevalence of diabetes among older adults suggests a clear need for effective diabetes prevention approaches for this population. The purpose of paper is to review what is known about changes in glucose tolerance with advancing age and the potential utility of resistance training (RT) as an intervention to prevent diabetes among middle-aged and older adults. Age-related factors contributing to glucose intolerance, which may be improved with RT, include improvements in insulin signaling defects, reductions in tumor necrosis factor-α, increases in adiponectin and insulin-like growth factor-1 concentrations, and reductions in total and abdominal visceral fat. Current RT recommendations and future areas for investigation are presented.
An Analysis of Adherence in Childhood Diabetes: Social Learning and Family Systems Variables
Lilly, Mary Kristine M.S. (Virginia Tech, 1998-03-30)
The purpose of the current study was threefold: 1) to assess youths' and parents' perceptions of their competency in managing diabetes, 2) to assess family flexibility and cohesiveness, and 3) to assess the utility of self-efficacy and family factors as predictors of adherence and metabolic control. Participants included 62 youths with insulin-dependent diabetes mellitus (IDDM) and their parents. Parents' and youths' perceptions of their abilities in diabetes and related situations, family cohesion and adaptability, and perceptions of the family's ability to integrate the demands of the diabetes regimen into general family routines were assessed. Results suggested that both social learning factors and general family relations were important in the prediction of youths' adherence to the treatment regimen for diabetes and metabolic control. Moreover, family efficacy and family cohesion were related, suggesting the need for models of assessment and intervention that include both social learning and general family functioning variables.
Application of Social Influence Strategies to Convert Concern into Relevant Action: The Case of Global Warming
Lehman, Philip Kent (Virginia Tech, 2008-02-04)
This research studied the efficacy of enhancing information-based appeals with social influence strategies in order to encourage environmental activism and efficiency behaviors in response to global warming. A secondary goal was to study the relationship between pro-environment attitudes as measured by the New Ecological Paradigm (NEP) and the activism/efficiency behaviors. After hearing a 15-minute presentation about the threat of global warming, 270 participants were encouraged to take relevant action by (a) signing web-based petitions asking automakers to build more environmentally friendly cars, (b) sending web-based letters to their state senators asking them to pass legislation to curb global warming, and (c) replacing their own inefficient incandescent light bulbs with compact fluorescent light bulbs (CFLs). The primary independent variable was the intervention technique used to encourage the three behaviors. The Information Only condition received a standard informational presentation, and a Social Influence condition received a presentation enhanced by the social psychological principles of authority, social validation, and consistency. A third group—Social Influence and Commitment—received the social influence manipulations and also signed a commitment statement. Overall compliance was relatively low, with 30.7% of participants across all conditions completing one or more activism/efficiency behavior. Statistical comparisons of the compliance rates of the three groups were insignificant, and thus failed to support the efficacy of the social influence approach. Participants who held stronger pro-environment attitudes were more likely to complete the tasks. Those who completed at least one of the environmental actions scored significantly higher on a pre-presentation NEP (m = 54.9) than those who completed none (m = 50.3). In addition, political conservatism was negatively related to the NEP and task compliance. Finally, individuals who completed at least one of the requested behaviors showed a significant increase in pro-environment attitude on a second (post intervention) NEP, while the NEP scores of non-compliers remained unchanged.
Are the Initiation and Maintenance of a Resistance Training Program Associated with Changes to Dietary Intake and Non-Resistance Training Physical Activity in Adults with Prediabetes?
Halliday, Tanya M. (Virginia Tech, 2016-05-02)
Prediabetes is associated with an elevated risk for developing type 2 diabetes (T2DM) and associated cardiovascular complications. Lifestyle factors such as physical activity (PA) and dietary intake are strongly implicated in the development of metabolic disease, yet few Americans meet PA and dietary recommendations. Middle-aged and older adults are at increased risk for developing prediabetes and T2DM due to age-related muscle loss, increased fat mass, and alterations in glucose handling. In addition, this segment of the population is least likely to meet PA guidelines, particularly the resistance training (RT) recommendation of completing a whole body routine 2x/week. Ideally, individuals would alter their lifestyle in order to meet PA guidelines and habitually consume a healthy diet, to decrease disease risk. However, behavior change is difficult and optimal strategies to promote and maintain changes have yet to be determined. Furthermore, behavior change interventions tend to be time-, cost-, and resource-intensive, limiting the ability for efficacious programs to be translated into community settings and broadly disseminated. Evidence suggests that health-related behaviors, particularly diet and exercise habits, tend to cluster together. Thus, intervening on one behavior (e.g. PA) may elicit a spillover effect, promoting alterations in other behaviors (e.g. diet), though findings to date are conflicting. The purpose of this dissertation was to determine if participation in a social cognitive theory-based RT program targeting the initiation and maintenance of RT exerts a spillover effect and is associated with alterations in dietary intake and/or non-RT PA in a population at risk for T2DM. Data from the 15-month Resist Diabetes study was analyzed to evaluate this possibility. Sedentary, overweight/obese (BMI 25-39.9 kg/m2 ), middle-aged and older (50 -69 years) adults with prediabetes (impaired fasting glucose and/or impaired glucose tolerance) completed a 3 month initiation phase where they RT 2x/week in a lab-gym with an ACSM-certified personal trainer. Participants then completed a 6-month faded contact maintenance phase, and a 6-month no-contact phase during which they were to continue RT on their own in a public facility. No advice or encouragement was given to participants to alter dietary intake or non-RT PA habits. At baseline, and months 3, 9, and 15, three non-consecutive 24-hour diet recalls were collected to evaluate dietary intake and quality, the Aerobics Institute Longitudinal Study Questionnaire was completed to evaluate non-RT PA, and body mass, body composition, and strength (3 repetition maximum on leg and chest press) were measured. At months 3, 9, and 15 social cognitive theory (SCT) constructs were assessed with a RT Health Beliefs Questionnaire. In the first study, dietary intake was assessed at baseline and after 3 months of RT. Using paired sample t-tests, reductions in intake of energy (1914 ± 40 kcal vs. 1834 ± 427 kcal, p = 0.010), carbohydrate (211.6 ± 4.9 g vs. 201.7 ± 5.2 g, p = 0.015), total sugar (87.4 ± 2.7 g vs. 81.5 ± 3.1 g, p = 0.030), glycemic load (113.4 ± 3.0 vs. 108.1 ±3.2, p= 0.031), fruits and vegetables (4.6±0.2 servings vs. 4.1±0.2 servings, p= 0.018), and sweets and desserts (1.1 ± 0.07 servings vs. 0.89 ± 0.07 servings, p = 0.023) were detected from baseline to month 3. No changes in other dietary intake variables were observed. These findings supported additional investigation in this area. The second study assessed changes in overall diet quality (Healthy Eating Index [HEI]-2010 scores) and non-RT PA over the initiation, maintenance, and no-contact phases using mixed effects models. Demographic, physiological, and psychosocial factors that may predict alterations to diet quality and non-RT PA were also explored. Energy and carbohydrate intake decreased with RT (β= -87.9, p=.015 and β= -16.3, p<.001, respectively). No change in overall dietary quality (HEI-2010 score: β= -0.13, p=.722) occurred, but alterations in HEI-2010 sub-scores were detected. Maintenance of RT was accompanied by an increase in MET-min/week of total non-RT PA (β=153.5, p=0.01), which was predicted by increased self-regulation for RT (β=78.1, p=0.03). RT may be a gateway behavior leading to improvements in other health-related behaviors among adults with prediabetes. These results support the use of singlecomponent vs. multi-component interventions. This may have broad translational potential for the development of time-, resource-, and cost-efficient lifestyle interventions which can improve multiple health-related behaviors and decrease disease risk.
Assessing levels of intoxication through behavioral observation
Glindemann, Kent E. (Virginia Tech, 1990-04-20)
The primary goals of this research were: 1) to develop an alcohol intoxication detection aid (IDA) that can be used to estimate reliably and accurately another person's level of alcohol impairment; 2) to evaluate the effect of alcohol on a computer-controlled critical tracking task (CTT), which assesses skills important to driving a vehicle; and 3) to examine the relationships between these two instruments and measured blood alcohol concentration (BAC). Teplin and Lutz (1985) developed an alcohol intoxication checklist for use in a hospital emergency room. Their results indicated a high correlation (.85) between actual BAC and intoxication estimates obtained by applying their checklist. This thesis refined and extended this prior checklist procedure for use with college populations, and included procedures to measure its validity and reliability. The CTT is a computer task which requires a subject to make a response to a brief digital display. Dependent measures include subjects' response time and error rate. Subjects' performance was consequently correlated with their BAC. The subjects were university students (n = 232) consuming alcoholic beverages at three regularly scheduled weekend fraternity parties. Subjects were recruited for testing from among those in attendance at these parties. Subjects were of legal drinking age. Results for both instruments were instructive and encouraging. Although reliability and validity coefficients for use of the IDA during the first party were unacceptably low. the changes made in the experimental methodology after this testing proved beneficial. Results of IDA use at the third party showed substantial increases in both interrater reliability and correlation with actual BAC. These results, however, were found to vary across individual judges. With CTT performance, mean response time and mean error rate were both reliable indicators of intoxication, and results stood up fairly well under a signal detection approach to the data analysis. Implications for use of both instruments in real-world settings are discussed.
Assessment of the correlates of sociometric status in children: behavioral, cognitive, peer perception and age differences
Meador, Alice E. (Virginia Polytechnic Institute and State University, 1985)
Sociometric status in childhood, despite its predictive validity, remains determinants.The relatively poorly understood construct with regard to its aim of the present study was to attempt a better understanding. Like most research studies, for every question answered, several were raised. Results of the present study indicated that, undoubtedly, an interaction of factors relate to sociometric standing. These include behavioral and cognitive skills as well as personal attributes such as athletic ability and physical attractiveness. The direction of these relationships remains unanswered. Exemplary of this causal confusion is the finding from this and other studies of a positive relationship between various cognitive social skills and popularity. This relationship has been demonstrated most reliably with withdrawn children. However, it is unclear whether cognitive skill deficits discourage interaction or whether reluctance to engage in social interaction impedes the development of social understanding. With this, as with other variables, it is likely best represented as a transactional model. Hence, acceptance by peers for whatever reason encourages, through social reinforcement, continued pursuit in that and other dimensions which, in turn, facilitate increased skill. Further, the importance of many of these dimensions varies with age and sex. Results of the present study partially replicated previous findings of the importance of peer behavior to sociometric status. However, the finding of a positive relationship between popularity and peer initiated negative interactions underscored the importance of differentiating rejected and neglected subgroups of unpopular children. For treatment studies, the accurate identification of these subgroups as well as the development of different treatment programs for withdrawn versus aggressive children is indicated. Although the results of the present study indicated that unpopular children, as a whole, demonstrated poorer skills in social perception, findings from previous studies, coupled with the small magnitude of difference in present findings, suggest that these skills may vary according to the type of unpopular child. Further, it appears that the importance of these cognitive skills is age dependent. Future research in the area of sociometric status should continue to focus on the identification of behaviors, cognitive skills, and personal attributes associated with peer popularity. Rejected and neglected children should be considered as significantly different subgroups of unpopular children. Finally, it is recommended that future research focus on developing more refined and standardized procedures for measuring affective social perception skills since this appears to be a fruitful and relatively unexplored area in relation to sociometric status.
A behavior analysis of alcohol consumption and impairment at university parties
Kalsher, Michael J. (Virginia Polytechnic Institute and State University, 1988)
Four field experiments were conducted to examine situational determinants of alcohol consumption at university fraternity parties. Certain manipulated variables were relevant to the development of environmental strategies for predicting and decreasing excessive alcohol consumption and deterring alcohol impaired driving. When entering university-sanctioned parties, students were asked a few questions and then they received a drink container and a stick-on badge, each with an ID number. During these parties, individual drinking rates of beer and mixed drinks or beer only were monitored under varying environmental conditions. When exiting the party, students' blood alcohol concentrations (BACs) were obtained with a breathalizer. In Experiment 1, three types of beer (Budweiser, Bud Light, and LA) were available in kegs labeled "A", "B", and "C". At a second party the kegs were labeled according to beer content (i.e., Budweiser, Bud Light, and LA). Results showed significant differences in drink choice across parties, with Budweiser most preferred by males and females when kegs did not indicate beer content and Bud Light most preferred by males and females when the kegs were labeled according to brand. The low alcohol (LA) choice was only selected substantially when the kegs did not reflect beer content. In Experiment 2, students of legal—drinking age at each of two weekend fraternity parties chose one of two types of alcoholic beverages (beer or mixed drinks) to consume throughout the night. Unbeknownst to the partiers, at the first of these two parties the beer drinkers were served regular beer, whereas at the second party low alcohol beer was served. Drinking rates were similar for beer and mixed-drink consumption at both parties; at the party with LA beer, students‘ mean BAC when leaving the party was significantly lower for the beer drinkers (i.e., .026 for LA consumers vs. .063 for mixed-drink consumers) For Experiment 3, students of legal drinking age at a weekend fraternity party chose one of two types of alcoholic beverages (beer or mixed drinks) to drink throughout the night. Unbeknownst to the partiers, drinkers were randomly assigned to either a regular alcohol content or low alcohol content version of their preferred beverage type. The drinking rates were greater for beer drinkers than for partiers consuming mixed drinks. Drinking rates were similar for both the low and regular alcohol alternatives. However, exit BAC was significantly greater for those in the regular-alcohol conditions. In Experiment 4, the alcoholic beverages available to students of legal—drinking age at one party (i.e., mixed drinks and beer) were served either by bartenders or served by themselves. A test of the theory of reasoned action was conducted by attempting to predict the number of drinks consumed and exit BAC from measures of general and specific intentions obtained two weeks before the party and at the start of the party. Specific drinking intentions obtained at the start of the party predicted a significant amount of variance in exit BAC (R = .59). The manipulation of situational variables also accounted for a portion of the variance in the number of drinks consumed and exit BAC. One environmental determinant at this party was the nature of drink delivery (i.e., self-serve vs. bartender). Male and female beer drinkers assigned to the Self-Serve condition drank at a higher rate and consumed more of their preferred beverage type than did those drinkers served by a bartender, or by those consuming mixed drinks in the self-serve condition. This increase was highest for male partiers. Male and female mixed drink consumers assigned to the Self·Serve condition drank at the lowest rate and consumed the least amount of their preferred beverage type.
A Behavioral and Educational Treatment to Improve Adolescent Mothers Supervision and Home Safety Practices With Their Young Children
Gulotta, Charles S. III (Virginia Tech, 1998-03-26)
Injury is the leading cause of death and disabilityamong American children, and most injuries to children aged 1-5 years occur at home. Factors associated with increased risk for unintentional injury to young children include an overcrowded home environment, low SES, and living with a mother who is young, less educated, more emotionally overwhelmed, and less protective in her supervision, attributes characteristic of many adolescent mothers. Previous research suggests that teaching parents basic child behavior management techniques can reduce child dangerous behavior (Mathews, et al., 1987; Powers & Chapieski, 1986), but these interventions have not addressed the lack of knowledge about child development common among adolescent parents. The current study employed a multiple-baseline design across subjects to assess the impact of a 6-week in home educational and behavioral treatment. Observable home hazards, supervisory skill, maternal efficacy, parenting stress, and cognitive readiness to parent were examined in four adolescent mothers (aged 16-19), in addition to the dangerous behavior of their children (aged 16-24 months). Mothers received education about child development and sensitive parenting, as well as training in home safety and child behavior management. Child dangerous behavior and maternal supervisory skill and positive behavior were assessed in weekly 20-minute videotaped mother-child interactions. Pre- and post- measures of parenting stress, cognitive readiness to parent, and maternal efficacy related to parenting and child safety were assessed by self-reports. Treatment resulted in improvements in mother positive behavior and knowledge of child development and in reductions of parenting stress, observable home hazards, and child dangerous behavior. A 2-month follow-up revealed some minimal maintenance of treatment gains suggesting additional booster sessions are needed for longer-term gains of reduced injury risk.
Bulimic Symptomatology in College Women: To What Degree are Hypnotizability, Dissociation, and Absorption of Relevance?
Galper, Daniel I. (Virginia Tech, 1999-04-08)
Bulimia is often viewed as an extreme expression of eating concerns and body image disturbances that afflicts many adolescent and adult women. The cognitive strategies employed by individuals to inhibit eating and facilitate bingeing and purging are thought to include disattending internal sensations of hunger and satiety while sustaining attention on food, distorted beliefs, and interoceptive experiences (e.g., Heatherton & Baumeister, 1991). To the extent that these attentional and perceptual shifts mediate bulimic symptomatology, individuals with bulimic tendencies should exhibit certain cognitive attributes. Because hypnotizability, dissociation, and absorption have each been invoked (either directly or indirectly) as explanatory constructs for clinical and subclinical bulimia, the present study evaluated the absolute and relative effects of these factors on bulimic symptomatology in a large sample of undergraduate women (N = 309) using structural equation modeling. Following 2 assessments of hypnotic susceptibility (Harvard Group Scale of Hypnotic Susceptibility, Form A [Shor & Orne, 1962] & Group Stanford Hypnotic Susceptibility Scale, Form C [Crawford & Allen, 1982]), participants completed measures of eating disorder symptomatology (Eating Disorders Inventory-2 [Garner, 1991]; Three Factor Eating Questionnaire [Stunkard & Messick, 1985]), dissociation (Dissociative Experiences Scale [Carlson & Putnam, 1986]; Dissociation Questionnaire [Vanderlinden et al., 1993]), and absorption (Tellegen Absorption Scale [Tellegen & Atkinson, 1974]; Differential Attentional Processes Inventory [Crawford, Brown, & Moon, 1993; Grumbles & Crawford, 1981]). A final model including the latent constructs Hypnotizability, Dissociation, Absorption, and Bulimic Symptomatology provided a very good fit to the data (X 2 (58, N = 309) = 31.09, NFI = .932, CFI = .967, & RMSEA = .053). As hypothesized, dissociation was found to a have moderate effect (Standardized coefficient = .32, p < .01) on Bulimic Symptomatology when controlling for Hypnotizability and Absorption. Moreover, contrary to past research, the path between Hypnotizability and Bulimic Symptomatology and the path between Absorption and Bulimic Symptomatology were not significant. Based on these finding, we can now speak with increased confidence of a meaningful link between dissociation and the continuum of bulimic symptomatology. A pathological dissociative style appears to contribute to the development of bulimia.
Cardiovascular reactivity in men as a function of masculine gender role stress, Type-A behavior, and hostility
Skidmore, Jay Robert (Virginia Polytechnic Institute and State University, 1987)
Previous research on the construct and measurement of Masculine Gender Role Stress (MGRS) validates the assumption of sex differences in the appraisal of stressful situations. The present study was designed to extend the validity of the construct, MGRS, by examining its association with a set of physiological responses known as cardiovascular reactivity. Generally, such reactivity is measured in terms of systolic blood pressure (SBP), diastolic blood pressure (DBP), and heart rate (HR). Cardiovascular hyper-reactivity has been implicated as the major pathogenic mechanism through which psychological variables such as Type-A behavior and hostility may increase one's risk of coronary heart disease. A major underlying assumption of the dissertation is that the same gender-role socialization which leads to MGRS may also underlie development of Type-A behavior and hostility, and most importantly, cardiovascular hyper-reactivity. Forty-eight male undergraduate students volunteered to complete questionnaires measuring MGRS, Type-A behavior, and hostility, and participated in a one-hour laboratory session in which cardiovascular reactivity was assessed. Measures of SBP, DBP, and HR were obtained during consecutive phases of the assessment: (1) relaxation baseline, (2) the first stressor, (3) relaxation baseline, (4) the second stressor. All subjects were exposed to both stressors, a Cold Pressor Task (CPT) and a structured Masculine Threat Interview (MTI) in counter-balanced order. Subjects were divided into equal groups representing lower, middle, and upper thirds of MGRS. Results indicated that MGRS scores were significantly related to cardiovascular reactivity, specifically the SBP response. Thus, higher levels of MGRS were associated with proportionate increases in SBP reactivity. Within-subjects comparisons demonstrated no difference between stressors, the CPT versus the MTI, for SBP reactivity. Regression analyses indicated that MGRS scores were a better predictor of SBP reactivity than either Type-A behavior or hostility. Together, all three psychological variables accounted for 20% of the variance of systolic reactivity; however MGRS alone accounted for 17% of that variance. These findings add considerable support to the theoretical assumption that gender role socialization plays an important role in men's appraisal of psychological stress, and that such stress has measurable (harmful) effects on cardiovascular physiology.
Co-variation of blood pressure and mood in the natural environment
Southard, Douglas R. (Virginia Polytechnic Institute and State University, 1985)
Current clinical diagnostic procedures may lead to an V over-identification of hypertension. The lack of a comprehensive assessment may also lead to difficulty in timing cognitive-behavioral interventions to coincide with periods when blood pressure is most elevated. The goals of the current study were (a) to determine if a laboratory relaxation procedure would be capable of discriminating those individuals who generally have elevated blood pressure from those who react with increased blood pressure specifically to laboratory assessment, and (b) to identify "markers" of emotional states which would enable individuals to determine when their blood pressure was elevated. Fifty-one undergraduate students at Virginia Tech volunteered to participate in a two-hour laboratory session consisting of baseline blood pressure measurements, a relaxation procedure and a battery of psychological questionnaires assessing anger, anxiety and Type A. This was followed by a two-day self-monitoring period consisting of approximately twelve self-reports of mood state concurrent with blood pressure measured by a portable, semi-automatic monitor. Results suggested that blood pressure response to the laboratory relaxation procedure was associated with the difference between average ambulatory blood pressure and laboratory blood pressure for diastolic A blood pressure only. Anger arousal and anger expression were unrelated to either average ambulatory blood pressure or high versus low ambulatory blood pressure readings. Perceptions of the environment as hostile and demanding did discriminate between high versus low systolic blood pressure and diastolic blood pressure readings. A cluster of negative moods discriminated between high and low systolic blood pressure readings. A cluster of moods characteristic of the Type A behavior pattern also discriminated high versus low systolic blood pressure readings as well as high versus low heart rate readings. One of the clearest findings of the study was the relationship between the type of analysis used and the probability of finding an association between psychological variables and blood pressure. In general, across subject analysis yielded fewer significant relationships than analyses emphasizing within subject variation. Exploring this further, two case studies are presented which illustrate statistical procedures for analyzing the relationship between blood pressure and mood in single case designs.
Colon Cancer Survivorship Experiences
Kelleher, Sarah A. (Virginia Tech, 2010-12-07)
The purpose of this project is to explore potential social cognitive and psychosocial predictors of lifestyle changes, including diet and physical activity behaviors, in a sample of colorectal cancer survivors who are at high risk of developing a second colorectal cancer. Participants, recruited from Georgetown University's Lombardi Comprehensive Cancer Center, are colorectal cancer survivors from families at high or confirmed risk of having a hereditary colorectal cancer syndrome. Results indicate that, at the bivariate level, many of the psychosocial and social cognitive variables of interest are significantly associated with one another as well as with various health behaviors and health behavior changes. Correlational data indicate that lower distress is associated with higher psychosocial functioning, self-efficacy, and self-regulatory ability. In addition, the data also suggest that individuals with higher self-efficacy display higher self-regulation and more positive outcome expectations related to health behaviors. Overall, participants were more likely to increase healthy behaviors or remain consistent with moderately healthy lifestyles practiced prior to their colorectal cancer diagnosis and treatment, and decrease unhealthy behaviors. Implications and directions for future research are discussed within the paper.
A Comparison of Feedforward versus Feedback Interventions for Safety Self-Management in Mining Operations
Hickman, Jeffrey S. (Virginia Tech, 2002-04-12)
This quasi-experimental field study examined the efficacy of a safety self-management intervention to increase safety-related work practices in mining operations. A total of 15 male miners participated in the study while engaging in their normal work practices at the Virginia Tech Quarry, located in Blacksburg, Virginia. The study had two groups, Feedforward (n=8)--participants self-recorded their intentions to engage in specific percentages of safety-related work behaviors before starting their shift for the day, and Feedback (n=7)--participants self-recorded their percentages of safety-related work behaviors after their shift for the day. After a seven-week Baseline, miners participated in a safety training presentation. Immediately following this training, participants from each group were instructed to complete one self-monitoring form each day on their self-intentions (Feedforward) or actual (Feedback) safety performance for four weeks. Participants were paid $1.00 for each completed self-monitoring form. All completed forms were entered into a raffle for a cash prize of $50.00 at the end of the Intervention phase. During Withdrawal (four weeks) miners did not complete any self-monitoring forms. Trained research assistants made a total of 10, 905 obtrusive behavioral observations on three target behaviors (ear plugs, dust mask, and safety glasses) and five non-target behaviors (gloves, hard hat, boots, knee position during lifts, body position during lifts) across phases. Results showed the safety self-management intervention significantly increased safety performance across both target and non-target behaviors during the Intervention phase.
A comparison of the efficacy of a group versus an individualized "job club" job search training format
Ax, Robert Kirk (Virginia Polytechnic Institute and State University, 1983)
Psychologists have begun to assess the effectiveness of interventions focused on assisting unemployed subjects to find work. One of the most comprehensive of these is the Job Club (i.e., Azrin et al., 1980, 1981), a multi-component treatment package which has proven effective in helping various populations to gain employment. The present study utilized three treatment groups to assess the efficacy of the group component of the Job Club program. Subjects (N=32), present or former psychiatric patients, were assigned to either a Job Club (group), a Job Bank (individualized Job Club), or a Standard Treatment (control) condition. It was hypothesized that Job Club condition subjects would show the greatest improvements over treatment on self-report measures of job-hunting assertiveness, self-efficacy, anxiety, depression, and hostility, on measures of interview skills, and on job-finding and rehospitalization related outcome measures. The Job Club condition was also predicted to be the most cost-effective. The Standard Treatment group was hypothesized to show the least improvement on the self-report, interview, and outcome measures and to be least cost-effective. It was predicted that Job Bank condition results would be intermediate between those of the other two groups on these measures. Finally, it was hypothesized that attendance at Job Club or Job Bank sessions would correlate positively with job-finding. Partial support was found for the hypothesis that Job Club subjects would show the greatest improvements in interview behavior. None of the other hypotheses was supported. Possible reasons for the present findings were discussed, including constraints external to the program itself, indicating the importance of a systems analysis approach to interventions such as this. It was concluded that future research should.focus on developing an assessment methodology so that treatment programs appropriate to particular situations may be formulated.
Computer mediated communication for health behavior change
Walker, William Bruce (Virginia Polytechnic Institute and State University, 1987)
A computer-mediated communication (CMC) system oriented towards changing health-related behavior was developed and evaluated. Stress management training was used to demonstrate the basic technology. Formative research and pilot-testing was conducted, to identify psychological and communication variables that are potentially critical to facilitating behavior change through the CMC medium. The resulting system was used to compare two forms of CMC training with face-to-face intervention: CMC Intensive Intervention (CII) and CMC Non-Intensive Intervention (CNI), with 9 matched subjects per treatment condition. CII subjects used their personal computers and modems to exchange messages with a therapist (the author), as well as to interact with automated system functions. Such functions included cognitive/behavioral assessment, l recording of self-monitored progress in applying specific and general coping strategies to managing stress, and instantaneous graphic and verbal feedback on such progress. The CNI form of intervention relied primarily on message exchanges with the therapist, and presentation of general information on stress management. The face-to-face (FFI) treatment was a "traditional" stress management workshop, comprising weekly one-hour sessions over a six-week period. FFI subjects’ assessment, information presentation, self-monitoring, and feedback were analogous to their CII counterparts. Major findings were that the CII treatment was as effective as the FFI treatment, while the CNI intervention was less effective than the other two treatments, through 3 months follow-up. This finding suggests that active involvement of subjects in practicing specific coping strategies may be critical to efficacious intervention through the CMC medium. Other findings were that: (1) The CMC message-exchange function can establish a "client-therapist relationship", which potentially overcomes a limitation of "computerized treatment" identified by previous researchers. (2) CMC-based intervention, at least for stress management-related problems, appears to be more cost-effective than face-to-face intervention, for individual treatment but not for group treatment. Implications for extensions to other types of behavior-change intervention and research are discussed.
Construct validation of the type A behavior pattern in children: the importance of anger and achievement striving
Yaeger, Nancy J. (Virginia Polytechnic Institute and State University, 1988)
The validity of the Type A construct for children was empirically examined in the present study. The multi-trait, multi-method construct validation strategy was used to determine if the convergent, concurrent, and discriminant validities of the Type A construct would be supported. Constructs used as comparisons included anger, achievement-striving, and depression. Type of measures used included self-report, teacher-rating, and behavior observations. Subjects were 132 boys and girls in the fifth grade in elementary schools in Southwestern Virginia. Additional multiple regression analyses were employed to determine the best predictors of assessed levels of Type A behavior in children. Results indicated that different methods of measuring Type A behavior in children were significantly intercorrelated, thereby supporting the convergent validity of Type A in children. In addition, Type A was significantly and positively correlated with anger and achievement-striving, but more ambiguously related to depression. Type A did not achieve consistent discriminant validity from anger and achievement-striving, however, it was discriminantly valid when contrasted with depression. It was concluded the Type A behavior pattern for children did not achieve consistent construct validity. The implications of these findings for future research in the area of Type A behavior were discussed.

Browsing by Author "Winett, Richard A."

Results Per Page

Sort Options