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Assessment of Stress Effects on Cognitive Flexibility using an Operant Strategy Shifting Paradigm
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Cognitive flexibility and clinical severity in eating disorders
Kate Tchanturia1, Amy Harrison, Helen Davies
1Institute of Psychiatry, Psychological Medicine, King's College London, London, United Kingdom. kate.tchanturia@kcl.ac.uk
Plos One
|June 24, 2011
Summary
People with Anorexia Nervosa (AN) exhibit significantly impaired cognitive flexibility, a thinking style that may be a trait rather than solely a symptom of illness severity.
Area of Science:
- Neuroscience
- Psychiatry
- Cognitive Psychology
Background:
- Cognitive flexibility is crucial for adaptive functioning.
- Eating disorders, particularly Anorexia Nervosa (AN), are associated with cognitive impairments.
- The relationship between illness characteristics and cognitive flexibility in AN requires further elucidation.
Purpose of the Study:
- To investigate cognitive flexibility in individuals with eating disorders compared to healthy controls.
- To examine the influence of patient characteristics, such as body mass index (BMI) and illness duration, on cognitive flexibility.
Main Methods:
- Utilized the Brixton Spatial Anticipation Test, a measure of conceptual shift.
- Included a large cohort of 601 participants: 215 with AN (inpatients and outpatients), 69 with Bulimia Nervosa (BN), 29 with Eating Disorder Not Otherwise Specified (EDNOS), 72 in recovery from AN, and 216 healthy controls (HC).
Main Results:
- Anorexia Nervosa (AN) and EDNOS groups demonstrated significantly higher error rates on the Brixton Test compared to other groups.
- Effect sizes indicated a large decrement in cognitive flexibility for inpatient AN patients and a moderate decrement for outpatient AN patients relative to HC.
Conclusions:
- Findings confirm impaired cognitive flexibility in patients with Anorexia Nervosa (AN).
- Illness severity, as indicated by length of illness, does not fully account for the observed inflexibility.
- The results suggest that cognitive inflexibility may represent a trait characteristic in individuals with AN.
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