Reliability and Validity of the Coolidge Axis II Inventory: A New Inventory for the Assessment of Personality Disorders

Abstract

This group of studies describes the development of a 200 item, self-report, 4-point true-false inventory (Coolidge Axis II Inventory [CATI]) to assess personality disorders according to the criteria established in the Diagnostic and Statistical Manual of Mental Disorders (3rd ed., rev. [DSM-III-R]; American Psychiatric Association, 1987). The 13 personality disorder scales of the CATI had a mean test-retest reliability of .90 and a median internal consistency (Cronbach's alpha) of .76. There was a 50% concordance rate with clinician's diagnosis for 24 personality disordered patients. The median concurrent validity (raw score sums) between the CATI and the Millon Clinical Multiaxial Inventory-II for the 13 personality disorder scales was .58. Preliminary studies also support the reliability and validity of Depression, Anxiety, and Brain Dysfunction scales.

The 5-Dimensional Personality Test (5DPT): Relationships With Two Lexically Based Instruments and the Validation of the Absorption Scale

“…Hence, we might expect that the 5DPT scales for S, A, and G manifest stronger relationships with abnormal personality than the FFM dimensions Agreeableness, Openness, and Conscientiousness. Evidence supporting this possibility in relation to S and G can be derived from a study by Coolidge et al (2008), in which the 5DPT was correlated with the Coolidge Axis II Inventory (CATI; Coolidge & Merwin, 1992). In that study, all correlations of S and G with the 10 CATI DSM-IV personality disorder scales turned out to exceed the mean personality disorder correlations for the corresponding FFM scales listed by Saulsman and Page (2004).…”

A Review of the Measures Designed to Assess DSM-5 Personality Disorders

“…The Coolidge Axis-II Inventory (CATI; Coolidge, 1984) is a 225 item self-report scale, measuring DSM-III-R PDs (13 PDs) alongside three axis-I disorders (anxiety, depression and brain dysfunction). Coolidge and Merwin (1992) found an average test-retest reliability of .90 and a Cronbach Alpha level of .71 suggesting that this instrument is highly reliable in its efficacy to predict PDs. Watson and Sinha (1996) did find some gender bias regarding the antisocial PD scale and age biases for younger respondents (17 -24 years old) in comparison to older respondents (25 -57 years old).…”

“…The PDQ-R showed high sensitivity and moderate specificity for most axis II disorders (Hyler et al,1992) The (Coolidge & Merwin, 1992). …”

An Empirical Investigation of a New Measure to Assess Abrasive Personality Disorder Traits

“…Coolidge Axis II Inventory: Participants were asked to complete the 250-item, significant-other form of the Coolidge Axis II Inventory (CATI; Coolidge, 2015;Coolidge, Burns, & Mooney, 1995;Coolidge & Merwin, 1992). The CATI assesses 10 personality disorders from DSM-5, 2 personality disorders from the appendix of DSM-IV-TR (passive-aggressive and depressive), and 2 personality disorders from DSM-III-TR (sadistic and self-defeating), for a total of 14 personality disorder scales.…”