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Targeting binge eating in bulimia nervosa and binge eating disorder using inhibitory control training and implementation intentions: a feasibility trial

Published online by Cambridge University Press:  27 July 2020

Rayane Chami ,
Valentina Cardi Open the ORCID record for Valentina Cardi [Opens in a new window] ,
Natalia Lawrence ,
Pamela MacDonald ,
Katie Rowlands ,
John Hodsoll  and
Janet Treasure
Rayane Chami
Affiliation:
Section of Eating Disorders, Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
Valentina Cardi*
Affiliation:
Section of Eating Disorders, Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK Department of General Psychology, University of Padova, Padova, Italy
Natalia Lawrence
Affiliation:
School of Psychology, University of Exeter, Exeter, UK
Pamela MacDonald
Affiliation:
Section of Eating Disorders, Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
Katie Rowlands
Affiliation:
Section of Eating Disorders, Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
John Hodsoll
Affiliation:
Biostatistics and Health Informatics, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
Janet Treasure
Affiliation:
Section of Eating Disorders, Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
*
Author for correspondence: Valentina Cardi, E-mail: valentina.cardi@kcl.ac.uk
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Abstract

Background

This trial examined the feasibility, acceptability, and effect sizes of clinical outcomes of an intervention that combines inhibitory control training (ICT) and implementation intentions (if-then planning) to target binge eating and eating disorder psychopathology.

Methods

Seventy-eight adult participants with bulimia nervosa or binge eating disorder were randomly allocated to receive food-specific, or general, ICT and if-then planning for 4 weeks.

Results

Recruitment and retention rates at 4 weeks (97.5% and 79.5%, respectively) met the pre-set cut-offs. The pre-set adherence to the intervention was met for the ICT sessions (84.6%), but not for if-then planning (53.4%). Binge eating frequency and eating disorder psychopathology decreased in both intervention groups at post-intervention (4 weeks) and follow-up (8 weeks), with moderate to large effect sizes. There was a tendency for greater reductions in binge eating frequency and eating disorders psychopathology (i.e. larger effect sizes) in the food-specific intervention group. Across both groups, ICT and if-then planning were associated with small-to-moderate reductions in high energy-dense food valuation (post-intervention), food approach (post-intervention and follow-up), anxiety (follow-up), and depression (follow-up). Participants indicated that both interventions were acceptable.

Conclusions

The study findings reveal that combined ICT and if-then planning is associated with reductions in binge eating frequency and eating disorder psychopathology and that the feasibility of ICT is promising, while improvements to if-then planning condition may be needed.

Keywords

Binge eatingeating disordersfeasibilitygoal planningif-then planninginhibitory control trainingtrial
Type
Original Article
Information
Psychological Medicine , Volume 52 , Issue 5 , April 2022 , pp. 874 - 883
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Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press

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Footnotes

*

Joint first authors.

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