Is poor global processing a transdiagnostic feature of Body Dysmorphic Disorder and Anorexia Nervosa? A meta-analysis.

Katie Lang; Jess Kerr Gaffney; John Hodsoll; Amita Jassi; Kate Tchanturia; Georgina Krebs

doi:10.1016/j.bodyim.2021.01.012

Is poor global processing a transdiagnostic feature of Body Dysmorphic Disorder and Anorexia Nervosa? A meta-analysis.

Katie Lang, Jess Kerr Gaffney, John Hodsoll, Amita Jassi, Kate Tchanturia, Georgina Krebs

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Abstract

Body dysmorphic disorder (BDD) and anorexia nervosa (AN) are characterised by body image disturbance. It has been suggested that poor global integration in visual processing may underlie distorted body image, but empirical studies have yielded mixed results. The current study involved two meta-analyses aimed at examining the extent to which poor global processing is evident in BDD and AN. Studies were identified through a systematic literature search up to October 2020. The BDD search yielded 16 studies and the AN search yielded 18 studies. Random-effect models demonstrated a small pooled effect size for BDD (g = −0.44, 95 % CI −0.70, −0.17, p < 0.001) and a moderate pooled effect size for AN (g = −0.63, 95 % CI −0.77, −0.49, p < .001), with no evidence of significant publication bias for either. The results provide evidence that poor global processing is a transdiagnostic feature of both BDD and AN, although effects may be more pronounced in AN. Our findings highlight the possibility that interventions aimed at promoting global visual processing could prove beneficial in disorders characterised by distorted body image.

Original language	English
Pages (from-to)	94-105
Number of pages	12
Journal	Body Image
Volume	37
Early online date	12 Feb 2021
DOIs	https://doi.org/10.1016/j.bodyim.2021.01.012
Publication status	Published - Jun 2021

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title = "Is poor global processing a transdiagnostic feature of Body Dysmorphic Disorder and Anorexia Nervosa? A meta-analysis.",

abstract = "Body dysmorphic disorder (BDD) and anorexia nervosa (AN) are characterised by body image disturbance. It has been suggested that poor global integration in visual processing may underlie distorted body image, but empirical studies have yielded mixed results. The current study involved two meta-analyses aimed at examining the extent to which poor global processing is evident in BDD and AN. Studies were identified through a systematic literature search up to October 2020. The BDD search yielded 16 studies and the AN search yielded 18 studies. Random-effect models demonstrated a small pooled effect size for BDD (g = −0.44, 95 % CI −0.70, −0.17, p < 0.001) and a moderate pooled effect size for AN (g = −0.63, 95 % CI −0.77, −0.49, p < .001), with no evidence of significant publication bias for either. The results provide evidence that poor global processing is a transdiagnostic feature of both BDD and AN, although effects may be more pronounced in AN. Our findings highlight the possibility that interventions aimed at promoting global visual processing could prove beneficial in disorders characterised by distorted body image.",

author = "Katie Lang and {Kerr Gaffney}, Jess and John Hodsoll and Amita Jassi and Kate Tchanturia and Georgina Krebs",

note = "Funding Information: Dr Georgina Krebs is funded by a UK Medical Research Council Clinical Research Training Fellowship (MR/N001400/1). Professor Kate Tchanturia and Dr Jess Kerr-Gaffney are supported by the MRC/MRF. Professor Kate Tchanturia would also like to thank the Maudsley Charity for their support. The Maudsley Charity is an independent NHS mental health charity which works in partnership with patients and families, clinical care teams and researchers at the South London and Maudsley NHS Foundation Trust, and community organisations, with a common goal of improving mental health, to support innovation, research and service improvement. Funding Information: Dr Georgina Krebs is funded by a UK Medical Research Council Clinical Research Training Fellowship ( MR/N001400/1 ). Professor Kate Tchanturia and Dr Jess Kerr-Gaffney are supported by the MRC/MRF . Professor Kate Tchanturia would also like to thank the Maudsley Charity for their support. The Maudsley Charity is an independent NHS mental health charity which works in partnership with patients and families, clinical care teams and researchers at the South London and Maudsley NHS Foundation Trust, and community organisations, with a common goal of improving mental health, to support innovation, research and service improvement. Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

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AU - Tchanturia, Kate

AU - Krebs, Georgina

N1 - Funding Information: Dr Georgina Krebs is funded by a UK Medical Research Council Clinical Research Training Fellowship (MR/N001400/1). Professor Kate Tchanturia and Dr Jess Kerr-Gaffney are supported by the MRC/MRF. Professor Kate Tchanturia would also like to thank the Maudsley Charity for their support. The Maudsley Charity is an independent NHS mental health charity which works in partnership with patients and families, clinical care teams and researchers at the South London and Maudsley NHS Foundation Trust, and community organisations, with a common goal of improving mental health, to support innovation, research and service improvement. Funding Information: Dr Georgina Krebs is funded by a UK Medical Research Council Clinical Research Training Fellowship ( MR/N001400/1 ). Professor Kate Tchanturia and Dr Jess Kerr-Gaffney are supported by the MRC/MRF . Professor Kate Tchanturia would also like to thank the Maudsley Charity for their support. The Maudsley Charity is an independent NHS mental health charity which works in partnership with patients and families, clinical care teams and researchers at the South London and Maudsley NHS Foundation Trust, and community organisations, with a common goal of improving mental health, to support innovation, research and service improvement. Publisher Copyright: © 2021 Elsevier Ltd Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

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N2 - Body dysmorphic disorder (BDD) and anorexia nervosa (AN) are characterised by body image disturbance. It has been suggested that poor global integration in visual processing may underlie distorted body image, but empirical studies have yielded mixed results. The current study involved two meta-analyses aimed at examining the extent to which poor global processing is evident in BDD and AN. Studies were identified through a systematic literature search up to October 2020. The BDD search yielded 16 studies and the AN search yielded 18 studies. Random-effect models demonstrated a small pooled effect size for BDD (g = −0.44, 95 % CI −0.70, −0.17, p < 0.001) and a moderate pooled effect size for AN (g = −0.63, 95 % CI −0.77, −0.49, p < .001), with no evidence of significant publication bias for either. The results provide evidence that poor global processing is a transdiagnostic feature of both BDD and AN, although effects may be more pronounced in AN. Our findings highlight the possibility that interventions aimed at promoting global visual processing could prove beneficial in disorders characterised by distorted body image.

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ER -

Is poor global processing a transdiagnostic feature of Body Dysmorphic Disorder and Anorexia Nervosa? A meta-analysis.

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