The neo pi-r,inwald personality inventory,and mmpi-2 in the prediction of police academy performance: A case for incremental validity

The utility of personality inventories for predicting successful police officer performance is an important issue in the law enforcement employment selection process. The purpose of the present study is to evaluate the incremental validity of the Minnesota Multiphasic Personality Inventory (MMPI-2), the Inwald Personality Inventory (IPI), and the Revised NEO Personality Inventory (NEO PI-R) for predicting police academy performance of 79 recruits. Results indicate that each inventory contributes significantly to prediction of academic performance in the academy, while only the NEO PI-R predicts physical performance. The addition of the NEO PI-R to selection processes that already incorporate the MMPI-2 and IPI may be useful for enhancing prediction of police officer performance.     

Associations between MMPI-2-RF (Restructured Form) and Inwald Personality Inventory (IPI) Scale Scores in a Law Enforcement Preemployment Screening Sample

The MMPI-2 is widely used in assessments of police officer candidates. The MMPI-2-RF, composed of 338 of the 567 MMPI-2 items, is designed to measure the core clinical constructs assessed by the MMPI-2, but in a more psychometrically sound and efficient manner (Ben-Porath and Tellegen 2008/2011). Law enforcement comparison group data are embedded in the scoring software for the inventory, and reported in the User’s Guide for the MMPI-2-RF Police Candidate Interpretive Report (PCIR; Corey and Ben-Porath 2014). In the present concurrent validity study, conceptually based hypotheses regarding associations between MMPI-2-RF scales and scores on the Inwald Personality Inventory (IPI, Inwald et al. 1982; Hilson Research 2006), a test specifically designed to screen law enforcement officers, were tested with a sample of 277 male, full-time police officer candidates from four separate police departments of varying sizes examined after a conditional offer of employment was tendered. The majority of participants were Caucasian (69%), followed by African-American (27%), or Other/Mixed ethnicity (4%). Our hypotheses were largely borne out, lending support to the construct validity of the MMPI-2-RF and the ability of scores on the inventory to assess variables relevant to police candidate evaluations.     

The MMPI-2 and statisfactory police academy performance: Differences and correlations

The Minnesota Multiphasic Personality Inventory (MMPI) and its later revision (MMPI-2) have been the most frequently employed psychological instrument in the selection of law enforcement officers (Bartol, 1996). In this study, state police trooper cadets were given a broad number of measures including the MMPI-2 prior to academy admission. Their performance at the police academy was then analyzed and related to their performance on the MMPI-2. Using step-wise multiple linear regression. Hy3 and Sc4 scores produced significant negative correlation’s with academy final grade point average. Student’s unpaired 1-tests between successful and unsuccessful cadets revealed differences between the groups for several MMPI-2 subscales including, but not limited to, K, MA, and SI, Lastly, logistic regression revealed no single subscale, or combination of subscales, which significantly predicted classification of the cadets as either successful or unsuccessful based on their MMPI-2 scores alone. Author Note: Elements of this article have been presented at the 27^th Annual Conference of the Society of Police and Criminal Psychology in Portland, OR, October 1998.     

A study of the interrelationships of several validity scales used in police selection

Validity scale data have received attention recently as providing valuable information about potential problematic police officer candidates. In this study, validity scale data from a number of selection instruments were obtained using 42 state police officer candidates. The scale used were the MMPI-2 L scale, the MMPI-2 K scale, the PAI Positive Impression Scale (PIM), the PAI Defensiveness Index (DI), the IPI Guardedness scale, the Hilson Life Adjustment Profile Lack of Candor scale, and the Inwald Survey 2 Denial of Shortcomings scale. Intercorrelations among the scales were developed and a factor analysis was performed. Factor analysis revealed two factors to be present. One is associated with the Hilson scales and is appropriately named guardedness or defensiveness. The other is associated with the MMPI-2 K scale and the PAI scales and is appropriately named social desirability. The MMPI-2 L scale loaded significantly on both factors and seemed to be the most general of the validity scales in terms of its characteristics. Implications of these analyses for police selection are discussed.     

A survey of pre-employment psychological evaluation tests and procedures

Current tests and procedures commonly employed in criminal justice system pre-employment psychological screenings in the southeastern United States were surveyed. Twenty complete data sets were obtained at the 2005 annual meeting of the Consortium of Police Psychologists. Survey respondents provide pre-employment psychological evaluations for 478 federal, state, and local law enforcement agencies. Approximately 55 percent of the psychologists used semi-structured/structured interview forms/questionnaires completed by the applicant. The Minnesota Multiphasic Personality Inventory (Hathaway & McKinley, 1991), the Inwald Personality Inventory (Inwald, 1979), and the California Personality Inventory (Gough, 1994) are used at more than 50 percent of the agencies. The Wonderlic Personnel Test (Wonderlic, 1992) is used at 49 percent of the agencies.     

Prediction of police officer performance with the inwald personality inventory

The Inwald Personality Inventory (IPI) was administered to police officer applicants during pre-employment psychological screening. Scores were used to predict applicant performance, as rated by supervisors, after one year of active duty and change in performance over a 10-month period. Performance was significantly predicted by IPI scales, including Family Conflicts, Guardedness, and Driving Violations. These findings support the predictive validity of the IPI and identify specific characteristics of applicants that may influence performance in the field. Author's Note: Paul Detrick, PhD, Florissant Psychological Services; John T. Chibnall, PhD, Department of Psychiatry, Saint Louis University School of Medicine. The authors thank Sarah Crank, Mariann Luther, and Dinah Michael for their helpful assistance with this project. Special thanks to Captain John Roach of the St. Louis Conty Police Department for his valuable support and contributions. Correspondence concerning this article should be addressed to Paul Detrick Florissant Psychological Services     

An investigation into the usefulness of the MMPI and MMPI-2 in municipal and state police candidate selection

The Minnesota Multiphasic Personality Inventory (MMPI) and the later revision (MMPI-2) have been two of the most frequently employed instruments in the selection of law enforcement officers (Bartol, 1996). In this study, the following three sets of data were collected and analyzed: municipal law enforcement officer candidates tested with the MMPI, municipal law enforcement officer candidates tested with the MMPI-2, and state police trooper candidates tested with the MMPI-2. These three data sets were evaluated for their effectiveness at predicting “pass/fail” status on police candidate interview using multiple linear regression. A combination of subscales were found to be associated with classification as either pass or fail on interview.     

Police corruption and psychological testing: a strategy for preemployment screening

The prediction, control, and prevention of police corruption represent pervasive and enduring problems. Researchers have suggested that intervention at the preemployment screening stage may be the best solution. However, investigators have acknowledged that existing assessment practices are flawed. This article proposes a strategy for the preemployment screening of law enforcement personnel. In particular, it examines the utility of the Inwald Personality Inventory and the Revised-NEO Personality Inventory in relation to assessing antisocial behavioral tendencies and conscientious personality traits, respectively, and argues that their combined use, appropriately administered in a testing situation, represents a reliable and valid predictor of good job performance. The article speculatively comments on this strategy for purposes of psychological testing, future research in the field, and law enforcement administration practices.     

Does the stereotypical personality reported for the male police officer fit that of the female police officer

This research, using the content, validity and clinical scales found in the MMPI-2, investigates the differences in the psychological makeup of male versus female police recruits. The research design involves testing of police recruits on the first day of their academy experience. The literature on the police personality suggest that there exists a stereotype for male officers, a finding replicated in this study. The findings of this research also suggest that female officers do not generally fit the stereotype found in the study of male officers. An earlier version of this paper was present at the 1996 Annual Meeting of the Academy of Criminal Justice Sciences, March 12–16, 1996, Las Vegas, Nevada.     

Validation of police officer recruit candidates' self-reported drug use

Three hundred and fifty-nine Chicago Police Department recruit candidates submitted urine specimens as part of a drug-screening program. Candidates were tested in two groups about a week apart. About 20% of the recruit candidates in each group evidenced drug, primarily marijuana use. As part of a psychological screening test battery all the candidates also took the Inwald Personality Inventory (IPI). The IPI contains a self-report Drug Use Scale. Drug-Positive and Drug-Negative candidates' Drug Use Scale scores were matched by age, sex, and racial/ethnic group and compared to evaluate the accuracy of self-reported drug use when screening police recruit candidates. Results showed that Drug-Positive candidates' self-reported drug use was consistently higher than that of Drug-Negative candidates. Item-level analyses showed which drug use items best discriminate between Drug-Positive and Drug-Negative candidates. Implications are drawn for use of self-report as part of a police candidate screening process.     

The effects of tenure on police officer personality functioning

The study compared pre-employment and current MMPI/MMPI-2 Basic Scale scores of small- and mid-size city Texas municipal police officers to assess longitudinal personality change. Participants had at least five years continuous, “street level” police experience. Twenty-three veteran police officers from a mid-size city and 19 small-city police officers volunteered to participate. Pre-employment MMPI/MMPI-2 information was obtained from police department records. Current MMPI-2 data was collected in small group or individual administrations. Significant increases in K-corrected T-Scores occurred on Scale F and eight of the Basic Scales; L and K decreased significantly. Mean scores remained within the normal range. Mid-size city officers produced higher K and 5 scores than small-city officers. Authors' Note: We gratefully acknowledge the assistance of Rick Bradstreet, Ph.D., and E. S. Collins, Chief of Police, in the data collection process. The results of this study were presented at the Annual Convention of the American Psychological Society in Denver, Colorado, in June 1999.     

A Meta-Analytic Review of Minnesota Multiphasic Personality Inventory—2nd Edition (MMPI-2) Profile Elevations Following Traumatic Brain Injury

Psychologists often use the Minnesota Multiphasic Personality Inventory (MMPI) and, more recently, its successor, the MMPI-2, to assess personality and psychological disturbances following traumatic brain injury (TBI). The present meta-analysis examined the pattern of mean Hedges’ d values on MMPI-2 validity (L, F, K) and clinical (1–4, 6–0) scales in individuals with TBI. Database keyword searches yielded ten studies providing post-TBI MMPI-2 profiles. Studies were required to include a pure TBI sample, individuals who were ≥18 at injury, and means and standard deviations for most MMPI-2 clinical scales. Analyses showed large effects for MMPI-2 scales F, 1, 2, 3, 7, and 8. Using Q statistics, moderating effects were found for TBI severity on scale 7 and for compensation-seeking/litigation status on scales 1, 2, 3, and 7. No significant effects were found for time post-injury. The available information was insufficient to examine the effect of lesion location, pre-injury personality and psychopathology, or time post-injury for samples with differing injury severities on MMPI-2 profiles. Results suggest that individuals with TBI report significant levels of psychopathology that may be moderated by TBI severity and compensation-seeking/litigation status. Discussion includes a literature critique given the meta-analytic findings and implications for future study of personality following TBI.     

An Investigation of Mental Health and Personality in Swedish Police Trainees upon Entry to the Police Academy

This study aimed at personality and mental health status of Swedish police trainees considering gender differences; and at relationships between personality and mental health. 103 individuals were investigated by means of the SCL-90-R and the Temperament and Character Inventory (TCI) upon entry to the police academy. By contrast, the police trainees were mentally much healthier than individuals from the general population. They reported low Harm Avoidance and their character dimensions were more developed in terms of strength, responsibility and reliability. Harm Avoidance (positively) and Self-Directedness (negatively) were found to be associated with all facets of psychopathology. The good mental health and mature personality characteristics reported by trainees, particularly the females, suggest that they have the strength to master the stressful situations which they will face in their professional lives. In order to prevent possible psychological disturbances later in life, due to the high level of distress in their work, the development of trainees’ personality in terms of particular coping skills should be regarded as an integral part of their professional training at the police academy.     

Using the good cop/bad cop profile with the MMPI-2

The Minnesota Multiphasic Personality Inventory (MMPI) has been widely used in a variety of ways to screen candidates for law enforcement positions. This study extends the use of the MMPI Good Cop/Bad Cop (GC/BC) profile (Blau, Super, & Brady, 1993) to the MMPI-2. The MMPI-2 profiles of 39 veteran police officers were used to predict their performance (No Apparent Problems, Borderline, or Serious Problems Possible), and these predictions were compared with supervisors’ ratings of the officers’ actual performance. The MMPI-2 predictions were accurate for 46% of the officers, a rate that was significantly better than chance (p=.024). Based on the current data, the best selection outcome would be obtained by accepting officers whose MMPI-2 profiles place them in the No Apparent Problems or Borderline groups, and rejecting officers whose profiles suggest Serious Problems Possible. This could be accomplished simply by rejecting any officer who obtained a score above 65T on any of the clinical scales. This selection strategy would have resulted in the acceptance of 22 officers, 19 of whom were highly rated by their supervisors, and the rejection of 17 officers, 11 of whom were rated as borderline or poorer by their supervisors. It would also result in the erroneous rejection of 6 officers who were highly rated by supervisors. AUTHOR NOTE: An earlier version of this paper was presented at the 1994 annual meeting of the Society for Police and Criminal Psychology, in Roswell, New Mexico. The authors wish to thank Jim Herndon, Ph.D., for this comments on this study.     

Predicting Police Aggression: Comparing Traditional and Non-Traditional Prediction Models

Psychologists can help to reduce inappropriate aggressive behavior through careful screening of police officer candidates. The purpose of this study was to identify whether the IAT Reasoning Test (IAT), a measure of trait aggression, and a Monetary Delay Discounting Task (MDDT), a measure of behavioral control, could predict on-the-job police aggression better than the MMPI-2. We administered the MMPI-2, the IAT, and the MDDT to 85 police officers. Three prediction models were created using scores on the IAT and the MDDT, and scales from the MMPI-2. Model 1 included the IAT and the MDDT. Model 2 included MMPI-2 scales Hostility (HO), Overcontrolled Hostility (OH), and Anger (ANG). Model 3 included MMPI-2 scales Frequency (F), Hysteria (HY), and Psychopathic Deviate (PD). We found that Model 1 was the only predictor of supervisors?? ratings of on-the-job aggression, however, the predictive utility of this model was attributable primarily to the MDDT predictor. Based on these findings, we suggest that using measures of behavioral control during preemployment screening may help to identify potentially aggressive police officer candidates.     

Comparison of the MMPI-2 and Niederhoffer Cynicism Scales for a Sample of police academy trainees

This study compared the Niederhoffer Cynicism Scale, as a less costly alternative, to the MMPI-2 measure of cynicism. Data were collected on both scales from a sample of male and female police academy trainees to compare reliability and construct validity. Subgroup analyses by race and sex yielded comparable Cronbach alpha estimates for minority (.71) and majority (.83) males to MMPI-2 norms. The Niederhoffer reliability values were marginally smaller (.73 to .77) but within the acceptable range. Construct validity correlations between both scales were significant for minority and majority males. However, sample size was too small for both minority and majority females groups to use appropriate statistical techniques to determine reliability or validity. Continued use of the Niederhoffer is recommended for minority and majority males. Author's Note: This paper was presented at the 44^th Annual Meeting of the Western Social Science Association in Albuquerque, NM, in April of 2002.     

Detection of Malingered ADHD Using the MMPI-2-RF

This study examined the utility of the Minnesota Multiphasic Personality Inventory—2 Restructured Form (MMPI-2-RF) validity scales for detecting feigning and exaggeration of attention-deficit/hyperactive disorder (ADHD) among college students. Under a simulation study design, participants with and without ADHD were assigned to perform honestly or to feign or exaggerate deficits related to ADHD while completing self-report symptom inventories. Participants instructed to feign produced symptom profiles similar to honest clinical profiles and more severe than honest nonclinical profiles. Participants with ADHD instructed to exaggerate produced less severe profiles than those instructed to feign and more severe profiles than clinical controls. MMPI-2-RF scale Fp-r showed potential for use in malingered ADHD detection at a revised cut score, which was significantly lower than the cut score suggested in the test manual; use of the revised cut score will require further validation. Scales F-r, Fs, and FBS-r did not classify well, but should be assessed in future studies of malingered ADHD. Detection of exaggeration was consistently poorer than detection of feigning.     

Personality differences between women police recruits, their male counterparts, and the general female population

Presently police manager and their recruiting staff are using an increasing number of screening tools including psychological testing during the hiring processes. Prior research suggests that gender is often ignored in the review of testing results. This could lead to problems in the interpretation of results. This research investigates the existence, if any, in the pre-socialization personality differences between male and female police recruits as well as between female police recruits and the general population of females. Subjects (N=104) were from a multi-agency training facility in a southern state. Subjects completed the MMPI-2 at the beginning of their police academy training to control for any socialization effects the training may have. The diagnostic clinical scales, the content scales, and the gender scales of the MMPI-2 were subjected to independent discriminant function analyses to determine if differences between male and female recruits exist. Scale 5 (Mf), GM, and GF were analyzed via t-tests to determine if differences between the female recruits and women in the normative sample exist. All discriminant functions were significant at the .05 level. Scales that differentiated male and female recruits were: Ma (Scale 9), ASP, FRS, BIZ, Mf (Scale, 5), and GF. Female recruits differed from the female normative sample on only GF (recruits were lower). It is suggested that future research focus on the predictive power of the content scales for continuation in the police field. It is also suggested that future research investigate the flexibility of the gender constructs throughout the policing career. Author Notes: Send all enquires to Larry A. Gould, Ph.D., Dept. of Criminal Justice, Northern Arizona Univerity, Box 15005, Flagstaff, AZ 86011-5005. 1. A special thank you is given to Northern Arizona University for providing the funding of the parent project from which this research was accomplished. I also wish to extend my gratitude to those whose time and effort went into the collection and computer entry of the data—Dr. Larry Gould and Rachel Rowland. In addition, I would like to thank Dr. Clay Moore for the statistical “chats”.     

Scale 8 Elevations on the MMPI-2 among Women Survivors of Childhood Sexual Abuse: Evaluating Posttraumatic Stress, Depression, and Dissociation as Predictors

This paper investigated elevations on Scale 8 of the Minnesota Multiphasic Personality Inventory-2 (MMPI-2) in women survivors of childhood sexual abuse (CSA) in order to assess whether symptoms of posttraumatic stress disorder, depression, or dissociation account for such elevations. Participants were 73 women seeking outpatient treatment for CSA after-effects at a university-based community mental health center. A stepwise multiple regression analysis was conducted, including measures of commonly reported symptoms in CSA survivors: depression, posttraumatic stress, and dissociation. Regression analyses revealed that the Beck Depression Inventory (BDI) and Dissociative Experiences Scale (DES) accounted for the most variance in Scale 8 scores (59%), with the BDI as the best predictor. The Impact of Event Scale (IES) did not predict Scale 8 scores significantly above that achieved by the model above. Cross-validation results indicated good generalizability. Results suggest that depression and dissociation contribute most to scores on Scale 8. Implications of these findings for the clinical and empirical use of the MMPI-2 with CSA survivors are discussed.     

Association of the MMPI-2 Restructured Form (MMPI-2-RF) Validity Scales with Structured Malingering Criteria

The current study examined the validity scales of the Minnesota Multiphasic Personality Inventory-2 Restructured Form (MMPI-2-RF; Ben-Porath and Tellegen 2008) in relation to the structured malingering criteria developed to assess malingered neurocognitive dysfunction and pain-related disability. These criteria examined a sample of 251 individuals undergoing compensation-seeking evaluations, who completed a battery of response bias measures. The MMPI-2-RF over-reporting scales yielded large effect sizes in contrasting those in the probable/definite malingering groups from the incentive only groups. The largest effects were found for the Infrequent Responses and Gervais et al. (Assessment, 14, 196–208, 2007) Response Bias Scale, an experimental scale that can be scored on the MMPI-2-RF. Classification analyses were also utilized to examine various cut scores for the individual validity scales, as well as their use in combination. These results suggest that the MMPI-2-RF validity scales can be used to screen for malingering, as they exhibited good sensitivity at lower cutoffs. The implications of these results and their use in forensic evaluations are discussed.