A new approach was taken to identify a specific construct or dimension being measured by a video-based situational judgment test (VBSJT). Appropriate exertion of control was specifically explored in relation to a VBSJT test designed for entry-level selection of law enforcement officers. Ratings from ten law enforcement experts were utilized to identify this construct. The VBSJT items scored toward overexertion of control were significantly related to performance (r = .23) in a sample of 334 incumbent police officers, capturing a large portion of the effective variance of the test which had an overall validity of r = .34. Situational variables within the items were then compared to ratings of exertion of control within a sample of 5426 applicants. General provocation toward overexertion of control and ethnicity significantly affected appropriate exertion of control. Gender and likeability also had significant impact on appropriate exertion, but the practical significance was limited. Specific character manipulations (i.e., rudeness, aggressiveness, pleasantness, cooperativeness, sympathy, and suspiciousness) also had a significant impact on appropriate exertion of control. Specific information manipulations (i.e., warrants, complaints, contemptible crimes and laws being broken) also had an impact on appropriate exertion of control. Some unexpected findings suggest that the character manipulations may actually override the effect of other provocation. The overexertion of control scale was also applied to test hypotheses about the likely behavior of police officers. It was found that the location of the organization had an affect on overexertion of control. Contrary to the hypothesis, suburban locations had more overexertion of control than urban locations. Length of tenure for police officers did not have an effect on overexertion of control. This difference did not affect validity across organizations. Implications and further research are discussed. / Ph. D.

The dual influence of person characteristics and situational contexts on behaviour has long been debated on by personality and social psychologists alike. Traditionally, personality traits have been emphasised, whilst the assessment of situational influences has received limited attention. As a result, there has been little progress in understanding how situational contexts impact individuals' daily organisational behaviour – a key imperative of organisational psychology. This study leverages recent developments in situation assessment to investigate the extent to which personality traits and situational characteristics independently, and in combination, predict workrelevant behaviour. Survey response data from 256 South African participants within the International Situations Project (ISP; Baranski et al., 2017) were analysed. Sets of multiple regression analyses were conducted with each of seven work-related behaviours as criteria, using the Big Five personality traits and DIAMONDS situational characteristics as predictors. Next, barebones meta-analysis (Hunter & Schmidt, 1990) of the resulting multiple correlation coefficients was conducted to estimate the relative predictive power of traits vs. situations, averaged across target behaviours. The results revealed that the combination of personality traits and situational characteristics explained more variance in work-related behaviour than their independent effects. Although situational characteristics independently predicted all work-related behaviours, personality traits were not strong predictors of particular behaviours. These findings highlight the importance of integrating knowledge of both traits and situations to enhance our understanding of why people behave the way they do. Practically, results further suggest that organisations may increase the ability to predict employee behaviour on the job by incorporating measures of situations, in combination with traits, into human resource management applications (e.g., personnel selection and assessment).

The dual influence of person characteristics and situational contexts on behaviour has long been debated on by personality and social psychologists alike. Traditionally, personality traits have been emphasised, whilst the assessment of situational influences has received limited attention. As a result, there has been little progress in understanding how situational contexts impact individuals' daily organisational behaviour – a key imperative of organisational psychology. This study leverages recent developments in situation assessment to investigate the extent to which personality traits and situational characteristics independently, and in combination, predict workrelevant behaviour. Survey response data from 256 South African participants within the International Situations Project (ISP; Baranski et al., 2017) were analysed. Sets of multiple regression analyses were conducted with each of seven work-related behaviours as criteria, using the Big Five personality traits and DIAMONDS situational characteristics as predictors. Next, barebones meta-analysis (Hunter & Schmidt, 1990) of the resulting multiple correlation coefficients was conducted to estimate the relative predictive power of traits vs. situations, averaged across target behaviours. The results revealed that the combination of personality traits and situational characteristics explained more variance in work-related behaviour than their independent effects. Although situational characteristics independently predicted all work-related behaviours, personality traits were not strong predictors of particular behaviours. These findings highlight the importance of integrating knowledge of both traits and situations to enhance our understanding of why people behave the way they do. Practically, results further suggest that organisations may increase the ability to predict employee behaviour on the job by incorporating measures of situations, in combination with traits, into human resource management applications (e.g., personnel selection and assessment).