Overweight and Obesity Clinical Trial
Official title:
Acceptance-based Behavior Treatment: An Innovative Weight Control
This project compares gold standard cognitive-behavioral therapy (based on LEARN, Diabetes
Prevention Program, LOOK Ahead) used in both research and clinical settings, with
acceptance-based behavioral therapy for weight loss. Standard behavior treatment (SBT)
focuses on modifying eating, thinking, and activity levels. Participants limit their daily
caloric intake, keep food records, increase physical activity, and practice weight control
behaviors, such as stimulus control, cognitive restructuring, alternative coping skills, and
distinguishing hunger from cravings. The acceptance-based approach (ABT) incorporates the
behavioral and nutritional components, but replaced the cognitive and motivational
components with components that are consistent with an acceptance-based approach, such as
acceptance and willingness to experience cravings, cognitive defusion, mindfulness training
to interrupt automatic eating, and values work. These components are drawn from Acceptance
and Commitment Therapy (ACT; Hayes, Strosahl, & Wilson, 1999), a cognitive-behavioral
therapy that has been gaining increasing attention and empirical support (Bach & Hayes,
2002; Bond & Bunce, 2000; Hayes et al. 2004). Though relatively new, acceptance-based
strategies have demonstrated effectiveness in helping individuals to respond to unwanted
thoughts and feelings (Hayes, Rissett, Korn, Zettle, Rosenfarb, Cooper, & Grundt, 1999,
Keogh, Bond, Hanmer, & Tilston, 2005) and offer a novel alternative to control-based
strategies (such as distraction and confrontation).
Participants in this study will be randomly assigned to either the traditional behavioral
therapy condition (SBT) or the acceptance-based behavioral therapy condition (ABT). Both
conditions are delivered in group format. A total of 30, 75 minute sessions will take place
over the course of 40 weeks.
Specific Aims
1. To evaluate the feasibility and acceptability of the treatment, and its short and
moderate-term effectiveness relative to the current gold standard behavioral treatment
(SBT).
2. To evaluate the effectiveness of ABT with novice clinicians and with weight control
experts.
3. To evaluate the effectiveness of ABT would be moderated by mood disturbance, emotional
eating, disinhibition or susceptibility to food stimuli.
n/a
Allocation: Randomized, Intervention Model: Parallel Assignment, Masking: Double Blind (Investigator, Outcomes Assessor), Primary Purpose: Treatment
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