Objective
The aim of this randomized controlled trial with a parallel design was to evaluate the effect of brief, cognitive remediation therapy (CRT) for anorexia nervosa (AN) on set‐shifting.
Method
Two hundred seventy‐five inpatient adults and adolescents with AN (mean age = 23.1; SD = 12.7) were randomly assigned (using simple randomization procedures) to either a CRT or control condition. All participants received treatment as usual; however, the CRT condition completed five CRT group sessions in lieu of other group therapies provided on the unit. Set‐shifting abilities were evaluated by: (a) neuropsychological measures and (b) experimental cognitive behavior therapy thought records. Blinding of group assignment occurred during baseline assessment and ended following group commencement.
Results
Data from 135 CRT and 140 control condition participants were analyzed. On all neuropsychological measures, results revealed no between group condition effects, but did show statistically significant time effects, with medium to large effect sizes. Thought record analysis revealed a significant condition by age interaction effect where adults in the CRT condition generated significantly more alternative thoughts and had stronger believability of alternative thoughts than children, a trend that was not found in the control condition. This yielded moderate to large effect sizes of.0.56 and 0.72, respectively.
Discussion
Based on traditional neuropsychological measures, these findings do not suggest a differential effect of CRT for AN in the format applied. However, results suggest that CRT may have some increased beneficial cognitive effect for adults, as compared to children, based on thought record analysis.
Anorexia nervosa (AN) is a difficult-to-treat mental illness associated with dangerous behavioral symptomatology. Interventions that augment the outcomes of existing inpatient and outpatient protocols for AN are critically needed. In-home treatments that address environmental change as a means to further promote behavior change have been applied for the care of multiple behaviorally based psychiatric illnesses, but not for eating disorders. The present study outlines the pilot application of a posthospitalization, four-session in-home relapse prevention treatment for a woman with a long history of AN. Over a 1-, 3-, and 6-month follow-up period, the patient exhibited substantial improvements in eating disorder symptomatology, sustained a healthy body mass index, and maintained positive environmental changes made by the end of treatment. The treatment was feasible and readily accepted by the patient. These positive findings suggest that more formalized research to further evaluate this novel adjunctive treatment for AN is warranted.
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