A Variable Response Inconsistency scale and a True Response Inconsistency scale for the Millon Adolescent Clinical Inventory.

Variable Response Inconsistency (M-VRIN) and True Response Inconsistency (M-TRIN) scales were developed for the Millon Adolescent Clinical Inventory using 104 male and 78 female delinquents, ages 13-17 years. M-VRIN efficacy was assessed by comparing nonrandom protocols of 76 male and 34 female delinquents, ages 13-17 years, with 100 computer-generated random protocols. Nonrandom protocols were screened using a matched-pair Minnesota Multiphasic Personality Inventory-Adolescent or Jesness Inventory. M-TRIN efficacy was assessed by comparing protocols with 160 simulated acquiescent and nonacquiescent protocols. Specificities of .95 or higher showed sensitivities up to .89 for M-VRIN, and .90 and .79 for M-TRIN. Predictive power and overall effectiveness are reported for several base rates. Small relationships may exist between M-VRIN and race, and between M-TRIN and gender.