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Using the PAI with an eating disordered population: scale characteristics, factor structure, and differences among
Giorgio A Tasca1, Jo Wood, Natalie Demidenko
1Department of Psychology, University of Ottawa and Ottawa Hospital, Ontario, Canada.
Journal of Personality Assessment
|November 12, 2002
Summary
The Personality Assessment Inventory (PAI) is a valid tool for assessing individuals with eating disorders. It effectively differentiates between diagnostic groups, aiding in treatment understanding.
Area of Science:
- Psychology
- Clinical Psychology
- Psychometrics
Background:
- Eating disorders are complex mental health conditions requiring accurate assessment tools.
- The Personality Assessment Inventory (PAI) is a widely used psychometric measure.
- Its utility within specific clinical populations, like those with eating disorders, warrants investigation.
Purpose of the Study:
- To evaluate the psychometric properties of the Personality Assessment Inventory (PAI) in a treatment-seeking sample of individuals with eating disorders.
- To examine differences in PAI scores among various eating disorder diagnostic groups.
Main Methods:
- The study involved 238 individuals diagnosed with an eating disorder seeking treatment.
- Psychometric properties including alpha coefficients, item-total correlations, and interitem correlations were analyzed.
- Factor structure analysis was conducted, comparing findings to existing literature.
- Differences in PAI cluster scores were compared across diagnostic groups (BED, BN, AN).
Main Results:
- The PAI demonstrated acceptable psychometric properties (reliability and validity) within the eating disorder sample.
- The factor structure of the PAI was largely consistent with prior research, with an identified additional factor related to interpersonal distance.
- Individuals with binge eating disorder (BED) reported less general distress and fewer problems compared to other eating disorder groups.
- Significant differences were found between BED/bulimia nervosa (BN) groups and anorexia nervosa (AN) groups on specific PAI clusters.
Conclusions:
- The PAI is a psychometrically sound instrument for use with individuals experiencing eating disorders.
- The PAI can effectively differentiate between various eating disorder diagnostic groups, offering clinical utility.
- Findings support the PAI's application in understanding the psychological profiles of individuals within different eating disorder diagnoses.