Long-Term Retest Reliability of Interpersonal Dependency Inventory Scores in College Students

Abstract

Eighty undergraduate students (40 women and 40 men) completed the Interpersonal Dependency Inventory (IDI) twice, with the two testing sessions separated by an 84-week interval. Retest reliability coefficients for IDI whole-scale scores, r = .71, and subscale scores ( rs ranged from .60 to .72) were similar to those obtained in IDI retest reliability studies that used shorter intertest intervals. Gender differences in IDI scores in the present sample paralleled those obtained in previous investigations involving clinical and nonclinical participants. Implications of these results for the construct validity of the IDI as a measure of interpersonal dependency are discussed.