The contribution of judgment scale to the unskilled-and-unaware phenomenon: How evaluating others can exaggerate over- (and under-) confidence

The unskilled-and-unaware phenomenon occurs when low performers tend to overestimate their performance on a task, whereas high performers judge their performance more accurately (and sometimes underestimate it). In previous research, this phenomenon has been observed for a variety of cognitive tasks and judgment scales. However, the role of judgment scale in producing the unskilled-and-unaware phenomenon has not been systematically investigated. Thus, we present four studies in which all participants judged their performance on both a relative scale (percentile rank) and an absolute scale (number correct). The studies included a variety of performance tasks (general knowledge questions, math problems, introductory psychology questions, and logic questions) and test formats (multiple-choice, recall). Across all tasks and formats, the percentile-rank judgments were less accurate than the absolute judgments, particularly for low and high performers. Furthermore, in Studies 1–3, the absolute judgments were highly accurate, even when the percentile-rank judgments were not. Thus, differences in the accuracy of percentile-rank judgments across skill levels do not always represent differences in self-awareness, but rather they may arise from difficulties that performers have at evaluating how well others are performing. Most importantly, the unskilled-and-unaware phenomenon on a relative scale does not guarantee inaccurate self-evaluations of absolute performance.     

A test of the micro‐expressions training tool: Does it improve lie detection?

The purpose of the study was to examine the effectiveness of the micro‐expressions training tool (METT) in identifying and using micro‐expressions to improve lie detection. Participants (n = 90) were randomly assigned to receive training in micro‐expressions recognition, a bogus control training, or no training. All participants made veracity judgements of five randomly selected videos of targets providing deceptive or truthful statements. With the use of the Bayesian analyses, we found that the METT group did not outperform those in the bogus training and no training groups. Further, overall accuracy was slightly below chance. Implications of these results are discussed.     

Effects of a Psychologically Based Management System on Work Motivation and Productivity

Introducing group work as a principle of work organisation to increase productivity in organisations operating in a globalising economy requires new methods of measuring performance in groups. This study describes the introduction of a measurement instrument as part of a participative productivity management (PPM) system in a medium sized factory producing rubber compounds. Using a simple quasi-experimental design, the PPM intervention was found to produce an increase in productivity and was also related to goal clarity, but not to higher group cohesion. It is concluded that PPM helps to increase productivity mainly by increasing task and goal clarity, and that increases in productivity can only be reached reliably when no competing system of performance appraisal exists besides PPM.     

Cardiovascular and neurohumoral responses to behavioral challenge as a function of race and sex

Cardiovascular and hormonal responses to a structured interview, an electronic video game, a cold pressor test, and exercise on a bicycle ergometer were assessed in eighty-three 25- to 44-year-old normotensive Black and White men and women. Blacks showed significantly greater diastolic blood pressure (DBP) responses than Whites during the cold pressor test, which were not accounted for by an increase in plasma catecholamines. Exercise produced reliably greater systolic blood pressure (SBP) increases in Black women than in Black men or White women. Men showed significantly greater SBP and DBP changes than women during the video game. These findings suggest that the pattern of physiological reactivity elicited by challenge is related to the race and sex of the subjects.