Randomized trial of a dissonance-based transdiagnostic group treatment for eating disorders: An evaluation of target engagement.
J Consult Clin Psychol
; 87(9): 772-786, 2019 Sep.
Article
em En
| MEDLINE
| ID: mdl-31403814
ABSTRACT
OBJECTIVE:
Test whether a dissonance-based transdiagnostic eating disorder treatment reduces valuation of the thin beauty ideal and high-calorie binge foods, the intervention targets, and eating pathology relative to waitlist controls.METHOD:
Women with Diagnostic and Statistical Manual of Mental Disorders-5 eating disorders (N = 100) were randomized to an 8-week group-implemented Body Project Treatment (BPT) redesigned to encourage rapid symptom reduction or a waitlist control condition, completing functional MRI paradigms assessing neural response to thin models and binge foods, questionnaires, and diagnostic interviews at pretest and posttest.RESULTS:
Compared to controls, BPT participants showed greater reductions in responsivity of regions involved in reward valuation (ventromedial prefrontal cortex, dorsolateral prefrontal cortex, caudate) to thin models but not binge foods, pursuit of the thin ideal (d = .72), palatability ratings of binge foods (d = .78), and greater increases in attractiveness ratings of average-weight models (d = .44), the intervention targets. BPT participants also showed significantly greater reductions in body dissatisfaction (d = .83), negative affect (d = .76), and eating disorder symptoms (d = .59), and marginally greater abstinence from binge eating and compensatory behaviors (39% vs. 21%) than controls.CONCLUSIONS:
Results provide novel evidence that BPT affected the hypothesized intervention targets and reduced variables that are putatively secondary to pursuit of the thin ideal, including body dissatisfaction, negative affect, and eating disorder symptoms. Symptom reductions were smaller than in past trials, suggesting that it may be optimal to reduce valuation of the thin ideal before asking participants to reduce disordered eating behaviors that are used to pursue this ideal. (PsycINFO Database Record (c) 2019 APA, all rights reserved).
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Psicoterapia de Grupo
/
Recompensa
/
Transtornos da Alimentação e da Ingestão de Alimentos
/
Núcleo Caudado
/
Córtex Pré-Frontal
/
Dissonância Cognitiva
Tipo de estudo:
Clinical_trials
/
Guideline
/
Prognostic_studies
Limite:
Adult
/
Female
/
Humans
Idioma:
En
Revista:
J Consult Clin Psychol
Ano de publicação:
2019
Tipo de documento:
Article