The Inventory of Altered Self-Capacities (IASC): a standardized measure of identity, affect regulation, and relationship disturbance.

This article describes the Inventory of Altered Self-Capacities (IASC), a 63-item standardized measure of disturbed functioning in relation to self and others. The seven scales of the IASC are Interpersonal Conflicts, Idealization-Disillusionment, Abandonment Concerns, Identity Impairment, Susceptibility to Influence, Affect Dysregulation, and Tension Reduction Activities. The psychometric properties of the IASC were examined in general population, clinical, and university samples. The IASC was found to have internal consistency/reliability and validity in all three samples. Generally as predicted, IASC scales were associated with existing measures tapping borderline and antisocial personality features, depression, suicidality, substance abuse, somatization, and dysfunctional sexual behavior