Relaibility and Validity of the Codependent Questionnaire

The validity and reliability of the Codependent Questionnaire (CdQ), a new measure of codependence, wis examined. In Study 1, using 48 undergraduate students, the CdQ total score displayed high levels of internal consistency (al ha = 36) and test-re-test reliability (r = 30). In Study 2 the CdQ 6 was administered to forty-two outpatient psychotherapy clients. Client CdQ scores correlated 5 3 with therapists' ratings of their clients' codependence, demonstrating criterion related validity. Convergent and discriminant validity was examined by correlating CdQ scores with the Mil- Ion Clinical Multiaxial Inventory (MCMI). The CdQ correlated positively with clinical disorders sharing common characteristics with codependence (borderline, dysthymia, anxiety, passive-aggressive) and had a non-significant or negative correlation with disorders reflecting characteristics incompatible with codependent behaviors (anti-social, narcissistic).