In a statistical comparison of orthogonal normalized varimax factor analytic solutions for the MMPI-168 including and excluding invalid protocols of psychiatric inpatients, at least one factor reflection was observed. Factors identified were Psychotic Distortion (Absence of Distress), Somaticism, Depression, Extroversion, Masculinity-Femininity, and Low Morale. Factors obtained, and representative clinical scales, were consistent with those obtained by others in investigations of both abbreviated and standard MMPI forms. Statistical comparison of factors identified by the two analyses indicated congruence. Possible sources of factor distortion were discussed.

Since women in the Women's Rights Movement (Feminists) tend to be educated, career- or goal-oriented, and typically middle-class it was anticipated that these aspects would be reflected in an elevation on the ego strength (Es) scale of the Minnesota Multiphasic Personality Inventory (MMPI). This anticipated elevation was felt to be functionally related not only to career- or goal-oriented behavior and intelligence, but to active participation on an autonomous basis in the Women's Rights Movement as well. Because of the different activities of various Feminist organization, i.e., women's studies programs, consciousness raising, investigations of inequities to women, confrontations with establishment hierarchies, and participation in career and other self-fulfilling activities, it was hypothesized that women who are active Feminists would score significantly higher on the Es scale than a similar group of active women who are not Feminists.

Thesis (Ph.D.)--University of Tulsa, 1992. / Bibliography: leaves 73-78.

The purpose of this study was to analyze the factor structure of items pertaining to health on the Minnesota Multiphasic Personality Inventory (MMPI2) for chronic back pain patients in comparison to a control group. The results may be used as groundwork for developing an MMPI2 subscale to describe this population. The groups differed in the sequence of the resulting factors and the percentage of variance accounted for by each factor. The factors extracted when evaluating the control group were titled in order: Poor Physical Health, Digestive Difficulties, Equilibrium, Depression/Malaise, and Multiple Somatic Complaints. Resulting factors for the pain group were: Depression/Malaise, Digestive Difficulties, Multiple Somatic Complaints, Headaches/Dizziness, and Neurological Reaction/Poor Physical Health.

This study was undertaken to help determine the usefulness of the Minnesota Multiphasic Personality Inventory (MMPI) for providing information regarding a person's object relations. Subjects were 136 college students (56 males, 80 females) ranging in age from 18 to 48. Subjects were administered the Rorschach, the Self Object Scale (SOS), and the MMPI. The Rorschach was scored using Blatt, Brenneis, Schimek, and Glick's (1976a) manual for scoring the level of object relations (Developmental Analysis of the Concept of the Object Scale-DACOS), the SOS scored as Blatt, Chevron, Quinlan, and Wein's manual (1981) directs, and the MMPI scored in the standardized manner using college-age norms. MANOVA's on the SOS and the DACOS resulted in significant effects for sex on MMPI scales 6, 7, and 8. Sex differences on MMPI scales 6 and 4 were obtained for high/low level of object relations on the DACOS. Pearson correlations showed positive correlations for males between level of object relations on the SOS and MMPI scale 5, and negative correlations on MMPI scale 5 for females. For males positive correlations between the DACOS and MMPI scale 4 and negative correlations on MMPI scale 10 were noted. These results were discussed as pertaining to the socialization of males and females. The most puzzling finding was the lack of correlation between the DACOS and the SOS. This was discussed as possibly being a result of the effect of the Rorschach, which measures psychopathology, whereas the SOS may be a purer measure of object relations. The paucity and weakness of the results was attributed to the restricted variance of the population. Implications for future research included obtaining a larger sample from a normal population, establishing clear norms for object eolations measures, obtaining correlations between a measure of current functioning and the object relations measures as a step toward establishing cut-off scores for groups on the measures, and further exploration of the weights in the scoring categories "of Blatt's DACOS scale.

The Minnesota Multiphasic Personality Inventory (MMPI) is the most frequently used psychological measure in the assessment of chronic pain. Since the introduction of the MMPI-2 in 1989 only two published studies have focused on cluster analysis of chronic pain patients. This study investigated MMPI-2 cluster solutions of chronic low-back pain patients. Data was collected from 2,051 chronic low-back pain patients from a multidisciplinary pain clinic in the southwestern United States. A hierarchical clustering procedure was performed on K-corrected T-scores of the MMPI-2 using the three validity and ten clinical scales. Four relatively homogeneous subgroups were identified for each sex with the MMPI-2. In general, these results replicated the findings of previous researchers using both the MMPI and MMPI-2.

Call number: LD2668 .T4 1955 S44 / Master of Science

Personality psychology became an identifiable discipline in the social sciences in the 1930s when Allport (1937) published an article on the psychological interpretation of personality. The field of personality traditionally emphasised the study of the whole person, the dynamics of human motivation and the identification and measurement of individual differences (McAdams, 1997). Since the publication of Allport’s article, personality has been extensively researched and several theories exist that attempt to organise and explain the differences in human behaviour. Personality instruments are based on personality theories and aim to assist psychologists with the prediction of human behaviour. Psychologists use personality instruments as part of a selection battery to assist organisations with the screening and selection of individuals who have the potential to be successful within a specific work environment. The Basic Traits Inventory (BTI), a personality instrument that is based on the Five-Factor model, was developed in South Africa by Taylor and De Bruin (2006). The BTI is a valid and reliable personality instrument as indicated by results from research by Taylor (2004), Taylor and De Bruin (2006) and Taylor (2008) on its utility within the multicultural and multilingual environment of South Africa. Taylor (2008) nevertheless identified some problematic items when she analysed the construct, item, and response bias of the BTI across cultures for three language groups – Afrikaans, English and indigenous African languages – and consequently indicated the need for further research in this regard. The current study therefore explores the possible bias of the items of the BTI, and uses a sample large enough to analyse each of the eleven of the official languages of South Africa separately. The study focuses on the impact of the eleven official languages of South Africa on assessment of the Big Five personality factors with the BTI. The actual sample consisted of 105 342 respondents, resulting in the sub-samples per official language group being larger than 1 000. Each of the eleven official South African language groups could therefore be analysed separately, which has not been possible in previous studies. Analysis of the responses of the total sample to the BTI items generally yielded high reliability in terms of Cronbach alpha coefficients (α) and the Person Separation Index (PSI). The results were reported as follows: Extraversion (α=.86; PSI=.85); Neuroticism (α=.89; PSI=.86); Conscientiousness (α=.93; PSI=.88); Openness to experience (α=.90; PSI=.84); Agreeableness (α=.94; PSI=.86); and Social desirability (α=.72; PSI=.70). MANOVA results indicated statistically significant differences between the mean values of each of the BTI factors for the different language groups. Rasch analysis methods were used to further analyse the differences in terms of item responses for each of the eleven official language groups in South Africa. Respondents generally interpret and endorse the items of a personality instrument according to their intrinsic personality characteristics and their interpretation of the words used in the items of the personality instrument. In order to assess the respondents’ understanding of the administration language, English, two English proficiency tests were administered together with the BTI. The combined English proficiency scores were used to differentiate between respondents who understood English very well (top 25% – high English proficiency group) and those who struggled to understand English terminology (bottom 25% – low English proficiency group). Rasch analysis techniques were used to analyse the data for the whole sample as well as for the high and low English proficiency groups. Some items showed statistically significant differences for the language groups, indicating item bias in the BTI. Contrary to expectation, a larger number of biased items were indicated for the higher English proficiency group than for the total group or for the low English proficiency group. Due to the number of biased items for the high English proficiency group, it was concluded that the differences between the eleven official language groups may be a result of the differences in the intrinsic personality characteristics of the respondents, rather than measurement errors or item bias of the BTI instrument. Further research in this regard was recommended. The current study confirms that home language and English proficiency, as indicators of the level of understanding of the language in which the personality instrument was administered, undeniably influence the individual’s response pattern. Far fewer items indicated bias than those identified in Taylor’s (2008) study, where a smaller sample was used and language groups were combined. Despite some BTI items showing bias, the conclusion was reached that this personality instrument can be used with confidence to assess personality traits in persons speaking any of the eleven official South African languages. / Industrial & Organisational Psychology / D. Comm. (Industrial and Organisational Psychology)

Previous research suggests as more scores are interpreted, there is a coinciding increase in the chance significant scores will be obtained. Interpretation of the MMPI-2 can involve the analysis of as many as 98 or more separate scores, suggesting the measure has a strong proclivity for producing a high frequency of seemingly abnormal scores amongst normal healthy adults. In the current study the incidence of elevated MMPI-2 scores was simulated for the normal population using Monte Carlo methodology. Interscale correlations from the MMPI-2 restandardization sample were obtained to determine the percentage of the population with N or more seemingly abnormal scores. Simulations were conducted for all scales combined, and for the Clinical, Harris-Lingoes, Content, Content-Component, and Supplementary scales separately at varying T-score cutoffs. 36.8% of normal adults are expected exhibit at least one elevated score on the Clinical scales at 65T. The normal incidence of at least one seemingly abnormal score was 38.3% on the Content, and 55.1% on the Supplementary scales. When all scale groups are considered together, approximately 50% of the normal population has three or more significant scores, and at least seven seemingly meaningful scores are found for one out of five normal persons. These results imply that consideration of a large number of MMPI-2 scales should be conducted with caution, and that high T-score cut-points may optimally increase confidence in the absence of corroborative test scores and extra test data.

The purpose of the study was to investigate the relationship between hypnotic suggestibility and personality among a group of delinquent and non-delinquent adolescent females. Also, an effort was made to determine if there is an adequate predictor of delinquency and non-delinquency which can be derived from the MMPI Validity, Clinical, and New Scales; or from the BSS Objective and Subjective Scales. Five hypotheses were presupposed and tested.