The Reliability and Validity of the Clinical Perfectionism Questionnaire in Eating Disorder and Community Samples.
BACKGROUND
Clinical perfectionism is a risk and maintaining factor for anxiety disorders, depression and eating disorders.


OBJECTIVE
The aim was to examine the psychometric properties of the 12-item Clinical Perfectionism Questionnaire (CPQ).


METHODS
The research involved two samples. Study 1 comprised a nonclinical sample (n = 206) recruited via the internet. Study 2 comprised individuals in treatment for an eating disorder (n = 129) and a community sample (n = 80).


RESULTS
Study 1 factor analysis results indicated a two-factor structure. The CPQ had strong correlations with measures of perfectionism and psychopathology, acceptable internal consistency, and discriminative and incremental validity. The results of Study 2 suggested the same two-factor structure, acceptable internal consistency, and construct validity, with the CPQ discriminating between the eating disorder and control groups. Readability was assessed as a US grade 4 reading level (student age range 9-10 years).


CONCLUSIONS
The findings provide evidence for the reliability and validity of the CPQ in a clinical eating disorder and two separate community samples. Although further research is required the CPQ has promising evidence as a reliable and valid measure of clinical perfectionism.
Curtin University,Australia.
Sarah J
SJ
Egan
UCL Institute of Child Health,London,UK.
Roz
R
Shafran
University of Reading,UK.
Michelle
M
Lee
Oxford University,UK.
Christopher G
CG
Fairburn
Oxford University,UK.
Zafra
Z
Cooper
Oxford University,UK.
Helen A
HA
Doll
Leicestershire Partnership NHS Trust and University of Leicester,UK.
Robert L
RL
Palmer
Curtin University,Australia,Child and Adolescent Health Service,Perth,Australia,University of North Carolina at Chapel Hill,USA, andThe University of Western Australia,Australia.
Hunna J
HJ
Watson
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015928:Cognitive Behavioral Therapy; D001068:Feeding and Eating Disorders / Q000523:psychology* / Q000628:therapy; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011594:Psychometrics / Q000379:methods* / Q000592:standards*; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires / Q000592:standards; D055815:Young Adult
Perfectionism; eating disorder; reliability; transdiagnostic; validity