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Browsing by Author "Williams, Neville Farley"

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    Facilitating Self-As-Context: A Treatment Component Study
    Williams, Neville Farley (Virginia Tech, 2015-07-31)
    A crucial step in assessing the scientific basis of a psychotherapeutic intervention is examining the individual components of the treatment to determine if they are additive or important to treatment outcomes. The construct of self-as-context (S-A-C), a central process in the acceptance and commitment therapy (ACT) approach, has not yet been studied in a component analysis. A previous dismantling trial, however, has shown this process has an additive effect as part of an ACT package (Williams, 2006). The current study is a preliminary trial of feasibility and efficacy to determine a) the practicality of assessing S-A-C in isolation in a laboratory setting, and b) the impact of manipulating S-A-C on theoretically related variables, including theorized mechanisms of change in various clinical approaches. 68 participants (55 female, 13 male) were randomly assigned to receive either a brief S-A-C intervention employing a common therapeutic metaphor (the chessboard metaphor), or the control condition, which involved discussing a mildly positive topic with the researcher. Results from the main analyses showed that there was no group-by-time interaction on measures to assess immediate impact on the construct, previously validated therapeutic mediation measures, or symptom measures. Several possible explanations for the failure to identify significant findings are discussed, including limitations of construct measurement. When analyses were repeated using only those participants whose scores were in the mild range or higher for stress, anxiety, or depression, time by condition interactions were significant for stress and approached significance for depression, with participants in the S-A-C group doing better than those in the control group, offering tentative support for the utility of this process among individuals with clinical difficulties. Implications for future studies are reported.
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    Promoting a Reduction in Meat Consumption: An Initial Study on the Efficacy of a Commitment Strategy
    Williams, Neville Farley (Virginia Tech, 2010-10-15)
    The current study employed an ABA design with a control group to assess the effectiveness of a commitment strategy in reducing meat consumption among university students (n=70). Participants who were randomly assigned to the commitment condition did not consume significantly less meat than participants in the control group, t (48)=.74, p=.47. 79% (n=19) of participants in the control group decreased their meat consumption from baseline to treatment phase, compared with 96% (n=27) of participants in the treatment group. Additionally, when both groups were collapsed, all participants reduced meat consumption from baseline to treatment phase t (51)=8.6, p<.001. Participants' scores on the Motivation Towards the Environment Scale, a measure of self-determined motivation towards environmental behavior, were not significant predictors of meat consumption behavior before or during the intervention, t(67)= -.26, p=.80, t(51)=.53, p=.60. Implications and directions for future research are discussed within the paper.