Doris Keye

Individual differences in conflict-monitoring: testing means and covariance hypothesis about the Simon and the Eriksen Flanker task

Conflict and context slow-down have been proposed as indicators of a conflict-monitoring system that initiates cognitive control to resolve conflicts in information processing. We investigated individual differences in conflict-monitoring and their associations with working memory (WM) and impulsivity. A total of 150 adults completed a Simon and an Eriksen flanker task, together with measures of WM and impulsivity. On both tasks, responses were slower and less accurate on incompatible than on compatible trials (conflict effect), and the conflict effect was larger when the preceding trial was compatible than when it was incompatible (context effect). Stimulus repetition did not explain the context effect. Individual differences could be attributed to three separable factors for each task: general speeded performance, conflict effect, and context effect. Evidence for across-task generality of these factors was sparse. Associations of these factors with impulsivity were weak at best. WM was correlated with general speed, and also with some but not all factors reflecting conflict-related processes.

Individual differences in response conflict adaptations

Conflict-monitoring theory argues for a general cognitive mechanism that monitors for conflicts in information-processing. If that mechanism detects conflict, it engages cognitive control to resolve it. A slow-down in response to incongruent trials (conflict effect), and a modulation of the conflict effect by the congruence of the preceding trial (Gratton or context effect) have been taken as indicators of such a monitoring system. The present study (N = 157) investigated individual differences in the conflict and the context effect in a horizontal and a vertical Simon task, and their correlation with working memory capacity (WMC). Strength of conflict was varied by proportion of congruent trials. Coherent factors could be formed representing individual differences in speeded performance, conflict adaptation, and context adaptation. Conflict and context factors were not associated with each other. Contrary to theories assuming a close relation between working memory and cognitive control, WMC showed no relation with any factors representing adaptation to conflict.

Structure and Correlates of the German Version of the Brief UPPS Impulsive Behavior Scales

The article proposes a shortened German version of the UPPS impulsive behavior scales. In Study 1, 149 high-school students completed the UPPS questionnaire, a Big-Five questionnaire, additional established self-report scales to measure conscientiousness and impulsivity, as well as tests of working memory capacity, reasoning, and clerical speed. Measurement models were applied to the full translated UPPS scales using confirmatory factor analysis. A satisfactory measurement model could be established only by removing many of the initial items. The remaining items correlated as expected with other self-report and ability measures: Substantial correlations with impulsivity and conscientiousness contrasted with zero correlations with working memory and reasoning ability. The association between impulsivity factors and perceptual speed was primarily a result of the number of solved items rather than the number of mistakes in the speed tasks. In Study 2 the reduced item set from Study 1 was administered to 246 ...

Which Aspects of a Semistructured Interview, Besides Cognitive Ability Tests, Contribute Incrementally to Predicting the Training Success of Air Traffic Controller Trainees?

This study examined whether a semistructured interview is valid in predicting training performance in theoretical and simulation examinations and overall training success; which aspects of the interview show incremental validity over cognitive ability tests; and whether additional variables enhance the prediction from the interview. The sample involved data from 337 trainees of the German Air Navigation Service Provider selected by the German Aerospace Center and 657 (interview) and 6,885 (cognitive ability) candidates being the corresponding reference samples. Findings indicate incremental validity of the interview over the cognitive ability tests. Additional variables contributed only to the prediction of theoretical examination performance. Attention, general motivation, and social competence predicted the criteria best, particularly the theoretical examination performance and overall training success.