M.Comm. (Industrial Psychology) / The objective of this study is to examine the construct validity of the Openness scale in the South African Personality Inventory (SAPI). The SAPI project aims to develop a personality questionnaire that is applicable in the multicultural South African context. A total of 891 students and working adults, of different race groups (White, Black, Indian and Coloured), with a minimum of Grade 12 or equivalent and speaking eleven different languages participated in the study. A cross sectional design was used to collect data using paper and pencil questionnaires administered in English. The Openness scale consisted of 23 items. A hierarchical Schmid-Leiman factor solution was used to investigate if a strong general Openness factor could be retrieved from participants’ responses. Tucker’s phi coefficient was used to determine factor congruence across language groups. The results suggest that more work is needed to improve validity and reliability of the current SAPI Openness scale, as it failed to produce a general Openness factor. Results show that it is difficult to attach meaningful psychological interpretations to scores on the Openness scale can be made.

M.Comm. (Industrial Psychology) / The purpose of the South African Personality Inventory (SAPI) project is to develop a personality measure that can be used within the South African context and that can account for the diversity that exists within the South Africa. This study is intended at validating the Conscientiousness scale of the SAPI as well as considering how well the measure replicated across language groups (Germanic, Nguni and Sotho) in South Africa. The data utilised in this study was collected from working individuals from a number of different organisations in South Africa (N = 890). The Conscientiousness scale consists of 36 items that yielded a five factor structure namely, Dedication, Discipline, Commitment, Orderliness, Organised. It was found that the Conscientiousness scale is a valid and reliable measure of the personality trait Conscientiousness scale. The results indicated that the general factor, Conscientiousness replicated well across the different language groups in South Africa, but the five factor solution did not yield conclusive results. Furthermore, the results of the Differential Test Functioning (DTF) analysis revealed that the scale had a significant effect size and upon further investigation it was shown that two of the items that had significant Differential Item Functioning (DIF) effect sizes could be removed in order to obtain a non-bias measure of Conscientiousness on the SAPI.

This thesis is a constructive attempt to unravel the dilemma posed by Mischel's (1968) work with trait and state theories of personality, through the use of a novel design. Mischel found a failure to predict behavior incrementally from inferences about underlying traits (personalities) and states (situations). This impasse is demonstrated in attribution theory by the difference between Kelley's (1967) emphasis on environmental cues (i.e., consistency, consensus, and distinctiveness) in attributional situations, and Russell's (1982) search for an attributional style (specific to the individual). This thesis shows the relative influence of the situation and one's personality in attributions to a successful subordinate. Subjects were 527 psychology students at Florida International University (FIU). They completed James' (1957) Internal-External (I-E) Locus of Control Scale, to distinguish between internal, mid-range, and external personalities. Each subject read one of the vignettes about an army event that varied according to Kelley's (1967) (1) internal, (2) ambiguous, and (3) external patterns, and was asked to make an attribution about the depicted event (i.e., they completed the locus of causality subscale of the Causal Dimension Scale [CDS]). These attribution making scores constitute a major dependent variable of interest. The degree of attributional difficulty experienced by the subject and the evaluative disposition of the subject toward the actions in the vignette were tapped as opportunistic dependent variables. Afterwards, subjects indicated their willingness to complete evaluative forms on the subordinates in the vignettes. This measured the subject's willingness to reward the subordinate, and constitutes another dependent variable of major interest in this study. MANOVA was used to account for the variance in the dependent variables (i.e., attribution making, attributional difficulty, evaluative disposition, and evaluative behavior). The 3 X 4 (personality X situation) MANOVA showed that the situation significantly accounted for the variance in all four dependent variables, while the subjects' personality significantly accounted for attributional difficulty and evaluative disposition. I discuss the possibility that personality distinguished the more private cognitions (since those analyses were significant) from the more public cognitions (which were not significant). I conclude that the strong situational influence supports Mischel's findings. Future researchers would do well to utilize an integrated research design (as this study has done) with processes involving personality and situation antecedents.

Personality plays an important role in various aspects of our daily life. It is being used in many application scenarios such as i) personalized marketing and advertisement of commercial products, ii) designing personalized ambient environments, iii) personalized avatars in virtual world, and iv) by psychologists to treat various mental and personality disorders. Traditional methods of personality assessment require a long questionnaire to be completed, which is time consuming. On the other hand, several works have been published that seek to acquire various personality traits by analyzing Internet usage statistics. Researchers have used Facebook, Twitter, YouTube, and various other websites to collect usage statistics. However, we are still far from a successful outcome. This thesis uses a range of divergent features of Facebook and LinkedIn social networks, both separately and collectively, in order to achieve better results. In this work, the big five personality trait model is used to analyze the five traits: openness to experience, conscientiousness, extroversion, agreeableness, and neuroticism. The experimental results show that the accuracy of personality detection improves with the use of complementary features of multiple social networks (Facebook and LinkedIn, in our case) for openness, conscientiousness, agreeableness, and neuroticism. However, for extroversion we found that the use of only LinkedIn features provides better results than the use of only Facebook features or both Facebook and LinkedIn features.

In a small, owner-managed, knowledge work firm, assessments were completed on the owners as a method to complete job analysis—surfacing tacit knowledge such as personal characteristics, cognitive style, values and philosophy that contributed to success. Business strategy is often strongly influenced by the tacit knowledge and competencies of the owners, and their unique perspective on the company and marketplace.

Leary has proposed a method of estimating overt interpersonal behavior from MMPI indices. However, subsequent investigations have only been able to validate a portion of this assessment technique at best. Thirty adults were individually given the MMPI to obtain estimates of interpersonal vertical (Dom) and horizontal (Lov) scores. Two raters described the subjects using the Interpersonal Checklist (ICL). The mean of theses two ratings produced the interpersonal vertical and horizontal scores. The Pearson Product Moment statistic was applied to the paired sets of vertical and horizontal scores. The results showed no correlation along the vertical or horizontal dimensions. Several possible explanations for these findings were discussed. It was concluded that Leary's Level I-M assessment method was not a valid estimate of overt interpersonal behavior.

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