Bias and error in multiple-choice tests

A formula for estimating real scores on a multiple-choice test from a knowledge of raw scores is derived. This formula does not involve the assumption of a binomial distribution of real scores as does the Calandra formula. Other important formulas derived show: the variance of real scores in terms of the variance of raw scores and the correlation between real scores and raw scores. If the variance of real scores (or of raw scores also) is binomial, the regression of real scores on raw scores is linear; but, otherwise the regression is curvilinear. Yet the linear estimating formula is a close approximation to the curvilinear relationship. Factors affecting the regression of real scores on raw scores and the correlation coefficient are: (1) the number of choices per question; (2) the number of questions answered; (3) the ratio of the average group raw score to the variance of raw scores.     

TRAINING PROGRAMS FOR OBSERVERS OF BEHAVIOR: A REVIEW1

This review covers the past 25 years of research literature on training observers of behavior, specifically in the areas of interviewing, reducing rater bias, interpersonal perception and observation as a research tool. The focus is on training procedure (i.e., the various training designs and their components). An attempt is made to organize and systematize the research and to answer two important questions. Which approach(es) used to train observers of behavior has (have) been most successful? What are the theoretical or empirical bases for the development of those training programs?     

EFFECT OF TEMPORARY CONTRACTS ON PERCEIVED WORK CHARACTERISTICS AND JOB STRAIN: A LONGITUDINAL STUDY

This longitudinal study investigates differences in perceived work characteristics and job strain as a function of employment status. The study examines the effects of a change from involuntary temporary to permanent status ( N = 75) compared to staying permanent ( N = 257), as well as comparing temporary contract and permanent contract employees at Time 1 and a second-wave comparison that included new temporary contract employees ( N = 92) and new permanent contract employees ( N = 34). Results suggest that temporary employment status is associated with negative and positive consequences. On the negative side, temporary status reduced perceptions of job security and participative decision making, which had deleterious effects on job strain. On the other hand, temporary employees had fewer strain-inducing role demands (in particular, lower role overload). The net effect was that temporary employees had lower job strain, which analyses suggested was due to indirect effects of the lower role demands.     

Artists' vulnerability to psychopathology: Towards an integrative cognitive perspective

A relationship is commonly reported between high levels of artistic creativity and mental health problems (e.g., depression or psychosis), and it is now becoming clearer that the divergent cognitive style associated with creativity has commonalities with some of the processes involved in the development and maintenance of some psychological difficulties. Our aim was to investigate the nature of this cognitive style. More specifically, we considered the profile of probabilistic reasoning and associated problem solving abilities, as both of these mechanisms have been found to be integral to major forms of clinical dysfunction. We assessed levels of creative potential, mood, probabilistic reasoning, and problem solving abilities in 66 arts and 85 science undergraduate volunteers. As predicted, art students showed higher levels of creative potential and experienced lower levels of mood than their science peers. Differences in probabilistic reasoning were observed which are in keeping with the pattern reported to be present in those suffering with psychosis in that they tended to ‘jump to conclusions’. Art students also displayed both poorer problem solving abilities and self‐appraisal of their problem solving skills. Our results extend previous findings associated with the mediating role of cognitive processes in the relationship between creativity and some forms of psychopathology. Implications for the prevention and treatment of psychological difficulties in the creative are highlighted.     

Imputation as Attribution: Union with Christ, Reification and Justification as Declarative Word

Calvin's integration of the christological features of the eucharistic controversy with soteriological questions in his refutation of Andreas Osiander marks a critical development in Reformed theology. In this article, that development is extended further in reconsideration of the nature of imputation as a linguistic action. It is argued that imputation is a soteriological corollary of the christological idea of attribution. Imputation thus conceived clarifies not only how it is located within the doctrine of union with Christ, but how that union and imputation provide clarity in ongoing discussions about reification of sin and righteousness as well as the nature of justification as a declarative word.     

RACIAL DIFFERENCES IN EMPLOYEE RETENTION: ARE DIVERSITY CLIMATE PERCEPTIONS THE KEY?

Given considerable racial differences in voluntary turnover ( Bureau of Labor Statistics, 2006 , Table 28), the present study examined the influence of diversity climate perceptions on turnover intentions among managerial employees in a national retail organization. The authors hypothesized that pro-diversity work climate perceptions would correlate most negatively with turnover intentions among Blacks, followed in order of strength by Hispanics and Whites (Hypothesis 1), and that organizational commitment would mediate these interactive effects of race and diversity climate perceptions on turnover intentions (Hypothesis 2). Results from a sample of 5,370 managers partially supported both hypotheses, as findings were strongest among Blacks. Contrary to the hypotheses, however, White men and women exhibited slightly stronger effects than Hispanic personnel.