Minnesota Multiphasic Personality Inventory-Adolescent-Restructured Form (MMPI-A-RF) characteristics of ADHD in a Korean psychiatric sample.

Global rates of attention-deficit/hyperactivity disorder (ADHD) have risen. In Korea, ADHD is associated with functional impairments and comorbidity with other psychological disorders. This study examined the correlates of ADHD in a psychiatric sample of Korean adolescents on the Minnesota Multiphasic Personality Inventory-Adolescent-Restructured Form (MMPI-A-RF). In a clinical sample of 247 adolescents, MMPI-A-RF scores from 46 patients diagnosed with ADHD were compared to the remainder of the clinical sample and to the Korean MMPI-A-RF norms. Results demonstrated significantly different scores for the ADHD group on scales indicating externalizing concerns and behavior dysfunction compared with the clinical group with other disorders and to a normative sample. Notable differences were also observed between clinical groups on scales reflecting interpersonal functioning. Relative risk ratio analyses demonstrated that an MMPI-A-RF T-score of 55 was generally most effective for predicting risk for an ADHD diagnosis in the clinical sample.

Evaluating the Measurement Invariance of MMPI-2-RF Restructured Clinical Scale 4 (Antisocial Behavior) between American and Korean Clinical Samples: Exploring Cultural and Translation Issues Affecting Item Responding.

Establishing the cross-cultural measurement invariance of psychometric scales is considered an essential step before scale means are compared across cultures. Although the MMPI instruments have been extensively researched, few studies have examined the measurement equivalence of MMPI scales in cross-cultural research. This study examined the measurement invariance of MMPI-2-RF Restructured Clinical Scale 4 (RC4; Antisocial Behavior) using multi-group confirmatory factor analysis with American and Korean clinical samples by (a) comparing a rationally-derived four-factor model (School Problems, Substance Abuse, Family Problems, and Violation of Social Norms) with a one-factor model, and (b) examining the measurement invariance of the RC4 four-factor model. After adjusting for age and gender, partial scalar invariance was achieved, and six non-invariant items were identified, most of which centered around substance abuse. Results support the generalizability of the four factors across cultures; however, special attention is needed when using substance abuse items with Korean clinical populations. Plausible sources of item non-invariance were explored in the context of translation challenges and observed patterns of relationship with external measures.

A comparative evaluation of Korean MMPI-A and MMPI-A-RF Substance Abuse Scales.

OBJECTIVE: The purpose of the present study was to compare psychometric properties of the Substance Abuse (SUB) Scale on the Korean Minnesota Multiphasic Personality Inventory-Adolescent-Restructured Form (MMPI-A-RF) with those on the Korean MMPI-A (the Alcohol/Drug Problem Acknowledgment Scale [ACK]), the Alcohol/Drug Problem Proneness Scale [PRO], and the MacAndrew Alcoholism Scale-Revised Scale [MAC-R]). METHOD: Participants consisted of 237 Korean adolescent psychiatric patients whose scores on these measures were compared in terms of internal consistency and predictive validity. RESULTS: Scores on SUB exhibited superior internal consistency to that of the MMPI-A substance abuse scales. Further, scores on SUB predicted substance abuse more accurately than did the optimal combination of scores on the MMPI-A substance abuse scales. CONCLUSION: Results provide strong support for the use of the Korean MMPI-A-RF SUB scale when assessing substance abuse in Korean youth.

Development and validation of culture-specific Variable Response Inconsistency and True Response Inconsistency scales for use with the Korean MMPI-2.

In response to the concern that Minnesota Multiphasic Personality Inventory-2 (MMPI-2; J. N. Butcher, W. Dahlstrom, J. R. Graham, A. Tellegen, & B. Kaemmer, 1989; J. N. Butcher et al., 2001) Variable Response Inconsistency (VRIN) and True Response Inconsistency (TRIN) score invalidity criteria recommended for use with American samples results in an excessive number of exclusions in Asian samples (F. M. Cheung, W. Z. Song, & J. X. Zhang, 1996), we examined the cross cultural equivalence of the original VRIN and TRIN scales, and developed and validated Korean-specific VRIN and TRIN scales with Korean adult normative, clinical, and college samples. Although the results from item pair correlation analyses suggested the superiority of the Korean VRIN and TRIN over the original VRIN and TRIN, the mean comparison results and classification accuracy statistics using data with varying degrees of randomly inserted true and/or false responses did not reveal a strong advantage of one version over the other. We present and discuss plausible causes of the findings.