Relationships between educational achievement, intelligence, and perfectionism in adolescents with eating disorders

Objective
High performance at school is associated with the risk of eating disorders (EDs), and perfectionism is proposed as an explanatory factor for this association. This study aims to evaluate (a) potential discrepancies between the measured IQ of adolescents with EDs and the IQ that is expected given their educational track, and (b) to what extent perfectionism was associated with educational achievement independent from IQ.

Method
WISC-III Verbal IQ, Performance IQ, and Full Scale IQ of 386 adolescent ED patients were compared with population norms for their educational track, using one-sample t tests. The association between self-oriented perfectionism (Eating Disorder Inventory-2) and educational achievement, adjusted for IQ, was determined with sequential ordinal regression analyses.

Results
Over 50% of the patients received pre-university education, the most complex educational track. For patients receiving education in the second most complex track, IQ-scores were lower than normative data for that track. For patients receiving pre-university education, the verbal IQ was lower than the norm for that track. Self-oriented perfectionism was associated with educational achievement independent from intelligence.

Discussion
This study suggests that high educational achievement is common in adolescents with EDs. Particularly for patients who receive education in the most complex tracks the demands at school may be higher than they can handle, based on their IQ. Self-oriented perfectionism contributed to educational achievement independent from IQ. Our results indicate that treatment for EDs should include awareness for the possibility of a too high target level of patients at school and perfectionism.