Browsing by Author "Katz, Benjamin D."
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- Antecedents and Consequences of Parent Technology Use in Parents of Young ChildrenDevine, Diana Michelle (Virginia Tech, 2024-01-10)The availability of and access to technology has been steadily increasing in recent years. Especially in light of the COVID-19 pandemic, technology use in some form is almost a daily occurrence in the United States (Vargo et al., 2021). A growing body of work has been examining familial technoference, which include interruptions to family interactions due to technology use, and a sub-focus of this research has specifically focused on parent-child relationships and technological interruptions. Using a comprehensive theoretical approach including an update to the process model of parenting (Belsky, 1984; Taraban and Shaw, 2018) and support from both attachment theory (Ainsworth et al., 1978; Bowlby, 1969) and ecological theory (Bronfenbrenner, 1977; Bronfenbrenner and Ceci, 1994), the current research examined the role of technology in parent-child interactions with parents of two-year-old children. In Study 1, constructs of parental technoference were explored in parents of children between 24-26 months of age to evaluate latent factors of parent technology use from 60 indicators and to identify parent and family characteristics that might predict the factors of technology use. A nationally recruited online sample of 323 parents of two-year-old children completed a set of questionnaires online to examine constructs of parental technology use and predictors of those constructs for Study 1. A CFA was conducted to evaluate the model fit of multiple indicators of parent technology use loading onto four predicted latent factors: Problematic Technology Use, Technoference with Child and Family, Social Support through Technology, and Technology Use as Regulation. The hypothesized model had poor fit, and an Exploratory Factor Analysis was conducted. In the final model, only 35 indicators emerged as significant factors to be included in the final model to map onto five latent constructs: Missing Out due to Technology, Problematic Technology Behaviors, Preoccupation with Technology, Positive Parenting through Technology, and Social Support through Technology. The final latent constructs parsed apart the predicted Problematic Technology Use into distinct constructs of thought (Preoccupation with Technology), behavior (Problematic Technology Behaviors), and consequence (Missing Out due to Technology), while items from the predicted Technoference with Child and Family mapped onto the more general Missing Out due to Technology (in various contexts, not just that within the family). Items from the predicted Technology Use as Regulation and Social Support through Technology mapped closely onto the Positive Parenting through Technology and Social Support through Technology constructs, respectively, albeit with fewer significant factor loadings than predicted. Next, predictors of the latent constructs (perceived stress, social support, parenting satisfaction, parenting self-efficacy, and both parent and child effortful control) were examined. SEM was conducted to determine predictors of these constructs of technology use. Perceived stress was a significant predictor of all five latent constructs. Parenting self-efficacy was a significant predictor of Problematic Technology Behaviors, Positive Parenting through Technology, and Social Support through Technology. Parenting satisfaction was a significant predictor of Problematic Technology Behaviors, Preoccupation with Technology, Positive Parenting through Technology, and Social Support through Technology. Social support was not a significant predictor of any latent constructs. Parent self-regulation was a significant predictor of Missing Out due to Technology and Positive Parenting through Technology. Child self-regulation was a significant predictor of Preoccupation with Technology, Positive Parenting through Technology, and Social Support through Technology. These findings demonstrate that there are distinct patterns of parental technology use that are differentially related to parent and family characteristics. This insight into characteristics that are associated with distinct types of technology use can be helpful in the development of targeted intervention for parents seeking to change their technology use behaviors. In Study 2, the impacts of parent technology use on parent behavior during parent-child interactions were examined through a repeated measures analysis of variance (RMANOVA) and Hierarchical Linear Modeling (HLM). In a randomized experimental design, 57 primary caregivers of 30–36-month-old children participated in three 5-minute free play sessions with their child in these conditions: control (no technology), television, and smartphone. Parent engagement with technology was scored in each condition, as well as parental sensitivity and involvement. First, RMANOVAs were conducted to explore differences in proportions of parent involvement with child play by condition and mean differences in parental sensitivity. There were significant differences in proportions of levels of parent involvement by condition; however, there were no differences in mean levels of parent sensitivity by condition. Due to a significant interaction between proportions of levels of involvement and order of condition, an HLM was conducted to control for change over time and isolate influences of condition on parent behavior. When time was controlled, there was significant negative effect of TV and a significant negative effect of smartphones on parental involvement. Overall, the findings from Study 2 demonstrated that caregivers are less involved with child play when technology is present, and especially so when smartphones are involved. Though there was not an overall effect of technology on caregiver sensitivity, further analysis did reveal that caregivers who attended to technology did have lower sensitivity scores than caregivers who did not attend to technology. The findings from this study replicate prior experimental work examining the role of background TV on caregiver-child interactions and extend findings to include the negative effect of smartphones on caregiver-child interactions. Together, the two studies provide further insight into parental technology use, understanding both antecedents and consequences of parent technology use in contribution to the overall knowledge of the mechanisms through which parent technology use relates to parenting and parent-child interactions. The findings from these studies combined can be used to develop targeted interventions for caregivers who are interested in making decisions about technology use within their families that are aligned with healthy developmental outcomes.
- Are Cooking Interventions Effective at Improving Dietary Intake and Health Outcomes? A Systematic ReviewWunderlich, Kayla Marie (Virginia Tech, 2022-09-14)Existing systematic reviews have suggested that cooking interventions can be beneficial for improving dietary intake and health outcomes, with research indicating that the ability to prepare meals at home may prove to be more complex, and involve influencing factors (i.e., cooking self-efficacy, food agency [i.e., one's ability to procure and prepare food with the considerations of their physical, social and economic environment], and nutritional literacy/knowledge) for improving health outcomes. With the average American's diet consisting of about 60% of total energy coming from the consumption of ultra-processed foods, interventions that target increasing cooking skills and the frequency of consuming home-cooked meals may help to reduce reliance on processed foods, improve dietary intake quality, and reduce risk of weight gain, obesity, and related conditions. To date, there are no systematic reviews that have addressed the impact of cooking interventions on processed or ultra-processed food consumption. Therefore, this research systematically reviewed the body of literature focused on cooking interventions and dietary intake including processed food consumption and evaluated intervention's effectiveness at improving dietary intake and physical and mental health outcomes. English and full-text research articles published through January 2021 were obtained through PubMed, CINAHL using EBSCO, Web of Science from Clarivate, Scopus and PsycInfo. Overall, 55 articles were obtained after meeting the inclusion criteria and going through the data extraction process. Outcomes of interests to measure included fruit and vegetable consumption, body mass index (BMI), body weight, waist circumference, blood pressure, physical activity, and if the study measured psychosocial outcomes or processed food consumption. Results indicate that when analyzing the effect sizes for studies that reported mean data for each group (eg, intervention and control/comparison groups), 86% of studies measuring fruit intake found a positive effect size (Average: Cohen's d: 0.65, 95% CI: 0.30, 0.99); 90% of studies measuring vegetable intake found a positive effect size (Average: Cohen's d: 0.80, 95% CI: 0.37, 1.09); 82% of studies measuring BMI found a negative effect size (Average: Cohen's d: -0.20, 95% CI: -0.58, 0.17); 100% of studies measuring body weight had a negative effect size (Average: Cohen's d: -0.27, 95% CI: -0.77, 0.23); and 100% of studies measuring waist circumference had a negative effect size (Cohen's d: -0.16, 95% CI: -0.60,0.24). This systematic review will provide information on recently published studies that were not incorporated in prior reviews that can be utilized in future interventions that aim to improve health outcomes and reduce processed food consumption.
- The effect of weight loss on circulating biomarkers of brain health and executive functionHerra, Lindsay Marie (Virginia Tech, 2020-06-04)Obesity is associated with deficits in cognitive function, particularly within the domain of executive function (EF). EF refers to higher order cognitive processes that regulate our ability to sustain attention, inhibit subconscious tendencies, remember and manipulate information for immediate use, and remain cognitively flexible. Deficits in EF in overweight and obese individuals may impact the success of weight loss and maintenance efforts. Therefore, understanding the biological links between obesity and EF, as well as the ability to reverse EF deficits with weight loss, is imperative. The first study aimed to determine the effect of weight loss in overweight and obese, middle-aged and older adults on serum brain-derived neurotrophic fact (BDNF), S100 calcium binding protein B (S100B), and glial fibrillary acidic protein (GFAP). Serum samples (n=21; 50-75 years, BMI 25-40 kg/m2) were pooled from two prior weight loss studies. Fasting blood measurements were taken before and after 8- or 12-weeks of hypocaloric diet-induced weight loss (1200 or 1500 kcal/d). Body Mass Index (BMI), body weight, waist circumference, and percent body fat (All p<0.001) decreased with weight loss. Serum BDNF (p=0.871), S100B (p=0.898), and GFAP (p=0.506) did not change following weight loss. The second study aimed to determine the correlation between the magnitude of change in serum BDNF, S100B, and GFAP and the magnitude of improvement in EF performance on three computer-based tests. Participants (n=8; 50-75 years, BMI 25-40 kg/m2) completed 4-weeks of hypocaloric diet-induced weight loss (1200 or 1500 kcal/d), followed by 4-weeks of weight maintenance (hypocaloric diet + steps/d goal). Fasting blood and EF measurements were completed at baseline, and weeks 4 and 8. BMI (p=0.001), body weight (p=0.001), waist circumference (p=0.002), and percent body fat (p=0.001) decreased from baseline to week 8. Serum BDNF (p=0.359), S100B (p=0.277), and GFAP (p=0.585) did not change following weight loss. Go/No-Go (GNG) errors of commission (p=0.009) and AX-Continuous Performance Test (AX-CPT) correct response time (p=0.041) decreased following the weight loss. The change in serum GFAP was inversely correlated with GNG errors of omission (r=-0.716, p=0.046) and AX-CPT correct hits (r=-0.737, p=0.037), and positively correlated with AX-CPT correct response time (r=0.859, p=0.006). In conclusion, although weight loss does not influence serum BDNF, S100B, or GFAP levels, it may have a positive effect on inhibitory control in overweight and obese, middle-aged and older adults. Further research is needed to understand the relationship between serum BDNF, S100B, and GFAP and executive function.
- Gut-brain interactions in food rewardBurns, Amber Lynn (Virginia Tech, 2024-01-11)Food choice and preference have been linked to post-ingestive consequences of food consumption. Many ultra-processed foods deliver calories rapidly and are highly rewarding. In literature surrounding substances of abuse, the speed at which a drug reaches the brain affects its abuse potential; this is known as the "rate hypothesis." Here, we test whether the rate hypothesis of addiction may apply to food, specifically whether caloric availability, or the speed at which carbohydrate becomes available for use, contributes to food reward and preference. To do this, we use beverages with novel flavors (conditioned stimulus (CS)) mixed with either a slow metabolizing carbohydrate (maltodextrin and inulin; CS+Slow), a fast-metabolizing carbohydrate (sucrose; CS+Fast), or no carbohydrate (sucralose; CS-). Participants are given each of these drinks 6 times to consume (conditioning period). 2 of these consumption periods occur during in-lab sessions. In one session, blood glucose is measured over one hour post-consumption. In another, we perform indirect calorimetry to assess post-consumption changes in substrate oxidation rates. At the post-testing session, changes in self-reported liking, wanting, and ad libitum intake of each beverage are recorded. Brain response to each flavor cue (without calories) is measured using fMRI at the post-test. We hypothesize the flavor paired with the CS+Fast will be the most liked, wanted, and consumed. We expect greater BOLD (blood oxygenated level dependent) activation to the CS+Fast relative to the CS+Slow and CS- in the nucleus accumbens and hypothalamus. This is an ongoing study and, here, we present our preliminary analysis of the data.
- Individual and Partner Exercise Status and Cognitive Function in Older AdultsRatliff, Kathryn Georgette (Virginia Tech, 2022-06-01)The present study used a linear mixed model analytic approach to assess the association between a combined respondent and spousal exercise score and cognitive outcomes of older adult respondents drawn from a nationally representative dataset, The Health and Retirement Study. Informed by the Scaffolding Theory of Aging and Cognition (STAC), the present study sought to understand the role of both an individual and their spouse's aerobic physical activity in an individual's cognitive outcomes and trajectories. Utilizing longitudinal survey data collected across twelve years (N=3,189), the combined exercise status of a married couple was found to be a significant predictor of cognitive outcomes; when an interaction between time and couple exercise status was included in the model, this was also found to be a significant predictor of four specific cognitive outcomes. The highest cognitive benefit was identified among individuals where both they and their partner participated in the recommended amount of aerobic physical activity, suggesting an additive effect. These findings and their implications are discussed further.
- Ketone Supplementation, Cardiometabolic Health, and Cognition in HumansReid, Glen Robertson (Virginia Tech, 2022-07-06)Cardiovascular disease (CVD) is the leading cause of death in the United States. Age is a primary risk factor for the development of CVD and middle-age is a vulnerable period where risk factors for the disease begin to exceed diagnostic thresholds. Interest has increased for the use of low carbohydrate high fat (LCHF) ketogenic diets due to their reported improvements for cardiometabolic health. Supplementation with exogenous ketone esters (KE) has been shown to increase plasma β-hydroxybutyrate (BHB) and mimic the metabolic effects of LCHF ketogenic diets. Evidence suggests elevated concentrations of plasma BHB may lower blood pressure, improve vascular function, attenuate hyperglycemic responses, and enhance cognitive function. The majority of research has been conducted in preclinical models, and whether exogenous KE supplementation has similar improvements in humans of any ages remains relatively unanswered. To address this we conducted a randomized, placebo controlled, crossover design study in healthy, sedentary, middle to older aged adults who received the exogenous KE (or placebo), and consumed the supplement for 2-weeks (3x/day, 15 minutes prior to each meal; breakfast, lunch, and dinner). Our first hypothesis was to test that KE supplementation would improve vascular function by increasing flow-mediated dilation, reducing arterial stiffness, and lowering blood pressure. Secondly, we hypothesized that KE supplementation would attenuate the glycemic response to an oral glucose tolerance test, improve glycemic variability, and show reductions in postprandial glucose levels. Thirdly, we tested the hypothesis that KE supplementation would improve cognitive performance by showing improvements in processing speed, memory, attention control, and executive functions. In support of our first hypotheses, KE supplementation increased flow-mediated dilation (8.1 ± 1.3 vs. 7.7 ± 1.2%, p = 0.023), but it did not show any difference in arterial stiffness or blood pressure. In contrast to our second hypotheses, following the KE supplementation intervention there were no significant difference from the placebo in terms of glycemic response, variability or mean 2-hour post-meal glucose. In support of our third hypotheses, we found a significant improvement in measures of working memory (7.55 ± 0.93 vs. 7.27 ± 0.29, p = 0.026) and inhibitory control (80 ± 38 vs. 87 ± 32ms, p = 0.035) following the 14-day KE supplementation. More research is needed to elucidate the effects of KE on cardiometabolic health and cognition.
- Let's Come Together: An Intersectionality-Informed Grounded Theory Analysis of How African American Daughters Navigate Family Relationships While Providing Care to a Parent with Alzheimer's DiseaseScott-Poe, Deneisha S. (Virginia Tech, 2023-05-15)Alzheimer's disease impacts many older adults within the United States and African Americans are at a higher risk for developing Alzheimer's disease. Most of their care is provided by their adult daughters, who are often tasked with managing multiple care responsibilities within their families. Prior research has examined one aspect of the caregiving experience for African American caregivers but not how their intersecting identities impact their experiences. As such, this study served to contextualize and highlight the nuances of their caregiving experiences. Using Intersectionality Theory as a guiding theoretical framework, this qualitative study explored how African American adult daughter caregivers navigated their family relationships while caring for a parent with Alzheimer's disease. Semi-structured interviews were conducted with twenty-six African American adult daughters caring for a parent with Alzheimer's disease. Findings revealed that 1) families came together by collaborating on decisions, connecting as a family and speaking regularly, and directly assisting and helping the caregiver, 2) family ideology about African American women and care influenced what the family expected of caregivers and what caregivers expected of themselves, and 3) caregivers are under compounding amounts of stress related to general caregiving strain, time, and racism/discrimination. These findings provide a more contextualized and holistic depiction of African American caregivers and their families. Future research and practical implications are discussed.
- Life's Simple 7 and Global- and Domain-Specific Cognitive Function in an Older Adult PopulationLopez, Kyra Elise (Virginia Tech, 2021-07-23)The American Heart Association Life's Simple 7 (LS7), a metric that classifies cardiovascular health using modifiable risk factors, has been reported to be associated with cognitive function. However, the assessment of cognitive function in prior studies has been limited to relatively crude global measures. We hypothesized that greater LS7 scores at baseline are associated with less cognitive decline and lower incidence of dementia and Alzheimer's. Using data from the core Health and Retirement Study survey (2012-2018), 2013 Health Care and Nutrition Questionnaire and enhanced face-to-face interviews we will evaluate cognitive scores in relation to LS7. The participants included in this analysis (n = 2,753) are greater than 50 years of age without dementia. A global cognitive score was calculated using the combination scores on multiple cognitive tests that include measurements of semantic memory, quantitative reasoning, episodic memory, and executive functioning. Changes in cognitive scores are evaluated based on marginal effects after adjustments for confounding variables. Baseline LS7 scores (0-14) were calculated using information on smoking habits, body mass index, habitual diet, blood pressure, non, physical activity, and hemoglobin a1c. Results were analyzed using linear mixed models fit with random intercepts and the use of Huber-White variance estimates to analyze the results. Knots were introduced to explain non-linear change in respondents. Global cognitive scores in all respondents decreased more between baseline to year two and year two to year four than year four to year six (ΔB-2: -2.796, Δ2-4: -3.362 v. Δ4-6: -1.191). A one unit increase in LS7 score presented a protective effect and slowed the rate of decline by 0.11 unit in global cognitive scores between baseline and year two. The protective effect was lower between year two and four (0.07 units) and non-significant between year four and six. Black respondents did not respond similarly in models than white respondents. A one unit increase in LS7 score increased the rate of decline from baseline to year two and year two to year 4 in black respondents (p<0.001, p<0.05). LS7 scores had no significant interaction with global cognitive scores between year 2 and 6. Serial 7 scores did not significantly change over time in any of the racial categories. A unit increase in LS7 scores showed a marginal protective effect on memory scores from year two to four in all respondents (r=0.03, p<0.001). In white respondents, higher LS7 scores had a protective effect on memory scores (r=0.01, p<0.05). The probability of developing dementia or Alzheimer's over the study period was the highest for males (P = 3.6%) than females (P = 3.3%) and lowest for white, females (P=13%) and highest for black, males (P=15%). Having higher LS7 scores at baseline is associated lower cognitive decline over a 6-year period in white, older adults. LS7 scores at baseline delayed word recall/memory scores over time but not serial 7/executive functioning scores. LS7 scores at baseline are not associated with lower incidence of cognitive impairment and dementia. Findings suggest better habits formed earlier in life have a better protective effect than late-life habits