Identification of random responding on the MMPI-A

Although substantial research literature on the effects of random responding on the MMPI-2 exists, there is very limited data available on this issue with the MMPI-A. The purpose of this study was to evaluate the utility of selected MMPI-A validity scales in detecting differences in response patterns between protocols produced by 354 adolescents assessed in clinical settings and a group of 354 randomly produced MMPI-A protocols. Results indicate that MMPI-A validity and basic clinical scales differ significantly between random and clinical groups and that MMPI-A validity Scales F, F1, F2, and VRIN appear to be most useful in correctly identifying protocols from actual clinical participants versus randomly generated response patterns. Findings are discussed in terms of the dramatic effects of the sample base rate for random responding on overall classification accuracy results. Furthermore, it was noted that the optimal cutting scores for MMPI-A Scales F, F1, F2, and VRIN were largely consistent with interpretive recommendations found in the test manual (Butcher et al., 1992) when the relative frequency of random response protocols to clinical protocols was evaluated at a ratio of 1:10. Finally, future recommendations for evaluation of the F1-F2 difference score and the TRIN scale are offered in terms of the most relevant research designs to evaluate these measures.     

MMPI-A validity scale uses and limitations in detecting varying levels of random responding

Although there is a substantial research literature on the effects of random responding on the MMPI-2 (Butcher, Dahlstrom, Graham, Tellegen, & Kaemmer, 1989), there are very few studies available on this topic with the MMPI-A (Butcher et al., 1992). Archer and Elkins (1999) found that MMPI-A validity scales F and VRIN were particularly useful in detecting entirely random profiles from those derived standardly in clinical settings but noted that "all random" protocols could not be used to evaluate the usefulness of the T-score difference between the first half (F1) and the second half (F2) of the MMPI-A test booklet. Following up on this issue, this study extended the methodology of previous research by examining the hit rate, positive predictive power, negative predictive power, sensitivity, and specificity of VRIN, F, F1, F2 and the absolute value of the T-score difference between F1 and F2 (denoted as IF1-F21) in 5 samples varying in the degree of protocol randomness. One of the samples consisted of 100 adolescent inpatients administered the MMPI-A under standard instructions, and another sample consisted of 100 protocols randomly generated by computer. The additional 3 samples of 100 protocols each contained varying degrees of computer-generated randomness introduced in the latter half of the MMPI-A item pool. Over- all, the results generally indicate that several MMPI-A validity scales are useful in detecting protocols that are largely random, but all of these validity scales are more limited in detecting partially random responding that involves less than half the total item pool located in the second half of the test booklet. Clinicians should be particularly cautious concerning validity inferences based on the observed T-score difference that occurs for the F1 and F2 subscales and current findings do not support the clinical usefulness of this index.     

Detection of back random responding: effectiveness of MMPI-2 and Personality Assessment Inventory validity indices

Two experiments examined the detection and effects of back random responding (BRR) on the Minnesota Multiphasic Personality Inventory--2 (MMPI-2) and the Personality Assessment Inventory (PAI). Experiment 1 revealed that MMPI-2 Clinical and Content scales were relatively resistant to the effects of BRR. Fb--F > or = 20T was the most effective index for identifying invalid protocols. Experiment 2 revealed greater susceptibility of the PAI interpretive scales to the effects of BRR and less successful detection of BRR. The most effective PAI validity index was the combined indicator, ICN > or = 73T or INF > or = 75T. Clinical and empirical implications of these findings are discussed, and tentative modifications to the MMPI-2 interpretative guidelines are provided.     

Efficiency of a strategy for detecting back random responding on the personality assessment inventory

The efficiency of a new strategy to identify back random responding (BRR) on the Personality Assessment Inventory (L. C. Morey, 1991) was studied using random manipulations of item responses from community (904 adult nonpatients) and clinical (1,079 adult patients) respondents. The strategy involved a comparison of short-form and full-instrument T scores on 2 scales found to be particularly sensitive to BRR in a recent study. This strategy was found to be reasonably sensitive and specific to even relatively low levels of BRR.     

Item-Level and Scale-Level Factor Structures of the MMPI-A

The Minnesota Multiphasic Personality Inventory-Adolescent (MMPI-A) is a 478-item test that represents a substantial revision of the original form of the MMPI. This investigation sought to identify the item-level factor structure of the MMPI-A and also examined the scale-level factor structure of the 69 scales and subscales of this instrument. The study utilized the 1,620 normal adolescents (805 boys and 815 girls) of the normative sample for the MMPI-A. These adolescents ranged in age from 14 to 18 inclusive, with a mean age of 15.54 for boys and 15.60 for girls. A principal factor analysis of item-level responses resulted in extraction of 14 factors that were subjected to promax (oblique) rotation procedures. These 14 factors incorporated 81% of the total MMPI-A item pool and accounted for 44% of the total item-level response variance. For the scale-level analysis, 8 factors were selected for extraction and submitted to promax rotation procedures. These eight factors accounted for a total of 93.5% of the total variance in MMPI-A scale and subscale raw scores, Item-level results were discussed in terms of areas of congruence and dissimilarities from previously reported MMPI factor analyses in adolescent and adult samples, and scale-level factor results were presented in terms of clinical implications for the interpretation of MMPI-A scales and subscales.     

Interpretation of MMPI-A Scale 5 with female patients

The present report describes clinical data useful in interpreting the meaning of elevations of Scale 5 of the MMPI-A with adolescent girls. Previous commentaries on the clinical significance of such scores have been ambiguous. The present findings suggest that scores which are elevated but still below a T value of 65 on this scale will be associated with acting out in treatment settings.     

Psychometric Stability of MMPI-A Item Modifications

The 478-item Minnesota Multiphasic Personality Inventory-Adolescent (MMPI-A) is a revision of the original test instrument for use in the assessment of adolescents. As part of the MMPI-A development, process, 70 items were modified from their appearance in the original test instrument to eliminate obsolete or sexist language, reduce awkward phrasing, increase item clarity, or improve item relevancy to adolescents' life experiences. If these modifications in the original item pool resulted in substantial differences in the frequency of respondents' endorsements of these lest items, such differences could pose a threat to the generalizability of research findings from the original form of the MMPI to the MMPI-A. This study examined the psychometric stability of modified items by comparing item endorsement frequency and item test-retest correlations in a group of 265 adolescents evaluated in repeated administrations design. Results of item analyses indicate that item modifications designed to improve the content or grammatical structure of these 70 items did not result in significant changes in response patterns.     

Detecting and Discriminating Between Random Responding and Overreporting on the MMPI-A

The utility of traditional validity scales in detecting random responding and overreporting on the MMPI-A and in discriminating between these two response sets was investigated in a sample of 89 clinical and nonclinical adolescents aged 14 to 17 years. The overreporting group consisted of 24 nonclinical adolescents instructed to complete the MMPI-A as if they were trying to create an impression of psychological disturbance. The random group included 20 nonclinical adolescents instructed to complete the MMPI-A answer sheet without access to the test booklet. Clinical (n = 20) and nonclinical (n = 25) standard groups completed the MMPI-A under the standard instructions. Results showed that validity scales designed to detect random responding and overreporting on the MMPI-A were quite effective in doing so. Significant differences between groups and high classification rates were noted. In addition, the VRIN scale was found to be sensitive only to random responding, whereas Scale F was sensitive to both random responding and overreporting. Scale L also was found to be sensitive to random responding, and support for the utility of the F - K index in identifying overreported adolescent profiles was obtained.     

Are critical items "critical" for the MMPI-A

This article examines one aspect of the potential usefulness of critical items to the: Minnesota Multiphasic Personality Inventory -Adolescent (MMPI-A). Endorsement frequency data are presented on the Koss-Butcher (1973) and the Lachar-Wrobeli (1979) critical items for Minnesota Multiphasic Personality Inventory-2 (MMPI-2) adult normative and clinical samples and for MMPI-A adolescent normative and clinical samples. Adolescents in both normal and clinical samples endorse critical items with a higher frequency than do normal adults. Further, results demonstrated that significant differences were uniformly found between the endorsement frequencies for normative versus clinical subjects for the MMPI-2 samples, whereas similar comparisons for the MMPI-A samples typically showed that adolescents in clinical setting did not endorse critical items more frequently than normal adolescents. These findings indicate that it may be difficult to construct critical item lists for adolescents based on the type of empirical methodology used with adults in which items are selected based on endorsement frequency differences found between comparison group. Beyond the issue of the technical difficulty in creating a critical item list for adolescents, several conceptual concerns are raised regarding the application of critical items to the MMPI-A. It was noted that the concept of "critical items" has not been we11 defined, and both the reliability and validity of critical items may be limited in adolescent populations.     

Scale 5 of the MMPI and MMPI-A: evidence of disparity

Scale 5 of the MMPI and MMPI-A was compared in a repeated measures design. Participants for the study were 43 adolescents classified as emotionally disturbed in a public school system and 17 inpatients at a residential treatment center. The MMPI Scale 5 mean score was substantially higher than that of the MMPI-A. The alternate-form reliability between Scale 5 of the two forms was surprisingly low, suggesting that the deletion of 16 items and rewording of 6 additional items changed the scale on the MMPI-A to an extent that may have significantly altered the underlying construct. The authors discuss factors that could be associated with the findings, including: (a) the diminished ability to express feminine interest on the MMPI-A, and (b) general changes in attitudes among adolescents over the 3 or more decades since the MMPI norms were developed.     

MMPI-A performance of African and Mexican American adolescent first-time offenders

54 African and Mexican American adolescent first-time offenders were examined with the MMPI-A to evaluate ethnic differences. Multivariate analyses by ethnicity and MMPI-A scales (validity, clinical, content, and supplementary scales) were not significant; however, there was a significant univariate difference where African American adolescents scored significantly higher on the Repression scale than the Mexican American group. A greater percentage of within-normal-limits profiles were African American (50%) than Mexican American (25%). Research and clinical implications for using the MMPI-A with these groups are discussed.     

Development of an Infrequency-Psychopathology scale for the MMPI-A: the Fp-A Scale

This article describes the development and initial validation of the Infrequency-Psychopathology scale, Fp-A, for the MMPI-A (Butcher et al., 1992). The scale parallels the Infrequency-Psychopathology scale, F(p), that has been developed for the MMPI-2 (Butcher, Dahlstrom, Graham, Tellegen, & Kaemmer, 1989). Results demonstrated that the 40-item Fp-A scale is superior to the F scale at discriminating between faking-bad and accurate reports of psychopathology, although the improvement over F was modest, particularly when compared to the improvement found for the F(p) scale. The difference seemed to reflect the superiority of the MMPI-A F scale to the MMPI-2 F scale. Even so, the findings suggest that the identification of overreporting on the MMPI-A could potentially be enhanced by using Fp-A as an adjunct to the F scale.     

MMPI-A structural summary characteristics of male juvenile delinquents

The Minnesota Multiphasic Personal Inventory-Adolescent Structural Summary factor scores for 655 male juvenile delinquents were determined. These Structural Summary scores were compared to the Structural Summary scores in the normative sample of boys. Elevations on Factor 2 (Immaturity) were most characteristic, with half of delinquents' scores being elevated by at least one standard deviation. Discriminant analyses suggested that linear combinations of the Structural Summary scores are as capable of distinguishing between the normative and delinquent samples as were linear combinations of the clinical scales. Furthermore, use of Structural Summary scores provided incremental validity in distinguishing between the two samples, increasing positive predictive power by 20% to 40% as compared to use of only the clinical, content, and supplementary scales.     

MMPI-A in the inpatient assessment of adolescents with eating disorders.

The MMPI-A (Butcher et al., 1992), like the older MMPI (Hathaway & McKinley, 1983), distinguishes between anorexia and bulimia. In this study, 245 adolescent girls diagnosed with anorexia, bulimia, or eating disorder not otherwise specified completed the MMPI-A. Multivariate analyses revealed significant differences between anorexia and bulimia on the MMPI-A's validity, clinical, content, and supplementary scales, particularly suggesting multiple impulse control problems among bulimic patients. However, profiles were also more homogeneous across eating disorder groups than in studies using the older MMPI, with high points involving some combination of Scales 1, 2, 3, and 0 for two thirds of the patients in this study. Implications are considered for understanding the common and differential psychopathology of eating disorders.     

Incremental validity of the MMPI-A content scales in the prediction of self-reported symptoms

The incremental contribution of the MMPI-A (Butcher et al., 1992) content scales to the prediction of scores on self-report measures of psychopathology was examined in a sample of 62 adolescents in inpatient treatment and 59 adolescents from the community. All participants completed the MMPI-A and a battery of criterion measures. A series of hierarchical regression analyses was conducted in which the MMPI-A clinical and content scales served as the independent variables and the criterion measures as the dependent variables. The content scales were found to have incremental validity beyond the clinical scales in predicting variance in the criterion measures. Similarly, the clinical scales also demonstrated incremental validity over the content scales in making these predictions. Both sets of scales made independent contributions to the prediction of sample membership (clinical vs. nonclinical). Findings suggest that both the clinical and content scales of the MMPI-A make significant contributions to the assessment of adolescents' psychological functioning.     

A factor structure for the MMPI-A: replication with male delinquents

The Minnesota Multiphasic Personality Inventory-Adolescent (MMPI-A) Structural Summary was developed as a means of simplifying the interpretation of the 69 scales and subscales of this test instrument by organizing findings around eight primary factor dimensions. The current study examined the scale-level factor structure of the MMPI-A in a large sample of 1,610 male juvenile delinquents to assess the potential usefulness of this factor structure in a delinquency population. In this attempt to replicate the MMPI-A scale-level factor structure identified by Archer, Belevich, and Elkins in the MMPI-A normative sample and by Archer and Krishnamurthy in a clinical sample, a correlation matrix of all MMPI-A scale raw scores was created for a principal factor analysis. Results from the factor analysis produced a seven-factor solution that was largely consistent with the dimensions of the MMPI-A Structural Summary. Results were also reported in terms of the frequency of elevations on Structural Summary dimensions, with particular evidence of the importance of the Immaturity factor in describing this male juvenile delinquent sample.     

Incremental validity of the MMPI-A content scales in a residential treatment facility

The current study explores the incremental validity of the Minnesota Multiphasic Personality Inventory-Adolescent (MMPI-A) content scales. Participants were 335 adolescents (250 boys and 85 girls) between the ages of 13 and 18 who were receiving mental health services from a residential treatment facility. Regression analyses were conducted to identify the amount of additional variance accounted for by the content scales over the clinical scales in predicting scores on a clinician rating form of psychological symptomatology. Several of the MMPI-A content scales demonstrated significant incremental validity above the clinical scales in predicting clinician ratings of adolescents' behavior and personality characteristics. The clinical scales also demonstrated incremental validity in reference to the content scales, indicating then that the two sets of scales provide complementary information. Magnitude of the additional criterion variance predicted was modest.     

Detection of auditory signals presented at random times

One hundred msec tones of 1000 Hz at four intensities were presented according to two Poisson schedules in a background of wide band noise and as increments to a 1000 Hz tone. Each 15 minute test session was run under fixed conditions and one of three instructions to detect the signals; the two Ss were free to respond at any time. The data analyzed were several inter-response and signal-response distributions, and they were compared with a theory due to Luce. Discrepancies between the theory and data indicate needed modifications of both the theory and the procedure.     

A replication of the MMPI-A PSY-5 scales and development of facet subscales

McNulty, Harkness, Ben-Porath and Williams recently developed Personality Psychopathology Five (PSY-5) scales for the Minnesota Multiphasic Personality Inventory-A (MMPI-A). This study examined these new scales in a sample of 545 adolescents receiving inpatient psychiatric treatment. Item-level principal components analyses were employed to determine the internal structure of each PSY-5 scale and to aid in the creation of facet subscales for each PSY-5 scale. Results suggest that the MMPI-A PSY-5 scales display adequate internal consistency and our findings generally replicate the original work of McNulty et al. but also extend this work by showing that several of the PSY-5 scales may also be subdivided into meaningful lower level dimensions. These facet subscales for each of the MMPI-A PSY-5 scales are offered for further study.     

Incremental validity of selected MMPI-A content scales in an inpatient setting

To date, relatively few studies have been published evaluating the validity or incremental validity of the content scales from the adolescent version of the Minnesota Multiphasic Personality Inventory (MMPI-A; J. N. Butcher et al., 1992). A sample of 629 psychiatric inpatient adolescents who had completed the MMPI-A was used to evaluate the ability of selected clinical and content scales to predict conceptually related clinical variables. Criteria were based on clinician ratings, admission and discharge diagnoses, and chart reviews. Results from hierarchical multiple and logistic regression analyses indicated the content scales offered incremental validity over the clinical scales and supported the use of the content scales as an adjunct to the traditional clinical scales.