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Performance Errors (performance + error)
Selected AbstractsSwitching between spatial stimulus,response mappings: a developmental study of cognitive flexibilityDEVELOPMENTAL SCIENCE, Issue 4 2004Eveline A. Crone Four different age groups (8,9-year-olds, 11,12-year-olds, 13,15-year-olds and young adults) performed a spatial rule-switch task in which the sorting rule had to be detected on the basis of feedback or on the basis of switch cues. Performance errors were examined on the basis of a recently introduced method of error scoring for the Wisconsin Card Sorting Task (WCST; Barcelo & Knight, 2002). This method allowed us to differentiate between errors due to failure-to-maintain-set (distraction errors) and errors due to failure-to-switch-set (perseverative errors). The anticipated age differences in performance errors were most pronounced for perseverative errors between 8,9 years and 11,12 years, but for distraction errors adult levels were not reached until 13,15 years. These findings were interpreted to support the notion that set switching and set maintenance follow distinct developmental trajectories. [source] On the positive side of error processing: error-awareness positivity revisitedEUROPEAN JOURNAL OF NEUROSCIENCE, Issue 7 2009Shani Shalgi Abstract Performance errors are indexed in the brain even if they are not consciously registered, as demonstrated by the error-related negativity (ERN or Ne) event-related potential. It has recently been shown that another response-locked potential, the error positivity (Pe), follows the Ne, but only in those trials in which the participants consciously detect making the error (,Aware Errors'). In the present study we generalize these findings to an auditory task and investigate possible caveats in the interpretation of the Pe as an index of error awareness. In an auditory Go/No-Go error-awareness task (auditory EAT) participants pressed an additional ,fix error' button after noticing that they had made an error. As in visual tasks, the Ne was similar for aware (,fixed') and unaware (,unfixed') errors, while the Pe was enhanced only for Aware Errors. Within subjects, the Ne and Pe behaved in similar fashions for auditory and visual errors. A control condition confirmed that the awareness effect was not due to the requirement to report error awareness. These results reinforce the evidence in favor of the Pe as a correlate of conscious error processing, and imply that this process is not modality-specific. Nevertheless, single-trial analysis suggested that the Pe may be a delayed P3b related to stimulus processing rather than to response monitoring. [source] Comparison of closed loop vs. manual administration of propofol using the Bispectral index in cardiac surgeryACTA ANAESTHESIOLOGICA SCANDINAVICA, Issue 3 2009J. AGARWAL Background: In recent years, electroencephalographic indices of anaesthetic depth have facilitated automated anaesthesia delivery systems. Such closed-loop control of anaesthesia has been described in various surgical settings in ASA I,II patients (1,4), but not in open heart surgery characterized by haemodynamic instability and higher risk of intra-operative awareness. Therefore, a newly developed closed-loop anaesthesia delivery system (CLADS) to regulate propofol infusion by the Bispectral index (BIS) was compared with manual control during open heart surgery. Methods: Forty-four adult ASA II,III patients undergoing elective cardiac surgery under cardiopulmonary bypass were enrolled. The study participants were randomized to two groups: the CLADS group received propofol delivered by the CLADS, while in the manual group, propofol delivery was adjusted manually. The depth of anaesthesia was titrated to a target BIS of 50 in both the groups. Results: During induction, the CLADS group required lower doses of propofol (P<0.001), resulting in lesser overshoots of BIS (P<0.001) and mean arterial blood pressure (P=0.004). Subsequently, BIS was maintained within ± 10 of the target for a significantly longer time in the CLADS group (P=0.01). The parameters of performance assessment, median absolute performance error (P=0.01), wobble (P=0.04) and divergence (P<0.001), were all significantly better in the CLADS group. Haemodynamic stability was better in the CLADS group and the requirement of phenylephrine in the pre-cardiopulmonary bypass period as well as the cumulative dose of phenylephrine used were significantly higher in the manual group. Conclusion: The automated delivery of propofol using CLADS was safe, efficient and performed better than manual administration in open heart surgery. [source] Switching between spatial stimulus,response mappings: a developmental study of cognitive flexibilityDEVELOPMENTAL SCIENCE, Issue 4 2004Eveline A. Crone Four different age groups (8,9-year-olds, 11,12-year-olds, 13,15-year-olds and young adults) performed a spatial rule-switch task in which the sorting rule had to be detected on the basis of feedback or on the basis of switch cues. Performance errors were examined on the basis of a recently introduced method of error scoring for the Wisconsin Card Sorting Task (WCST; Barcelo & Knight, 2002). This method allowed us to differentiate between errors due to failure-to-maintain-set (distraction errors) and errors due to failure-to-switch-set (perseverative errors). The anticipated age differences in performance errors were most pronounced for perseverative errors between 8,9 years and 11,12 years, but for distraction errors adult levels were not reached until 13,15 years. These findings were interpreted to support the notion that set switching and set maintenance follow distinct developmental trajectories. [source] Procrastination as self-regulation failure of performance: effects of cognitive load, self-awareness, and time limits on ,working best under pressure'EUROPEAN JOURNAL OF PERSONALITY, Issue 5 2001Joseph R. Ferrari Effects of cognitive load, objective self-awareness and time limits on the self-regulation of performance speed and accuracy were investigated between procrastinators and non-procrastinators. In experiment 1 chronic procrastinators completed fewer items (slow speed) and made more errors (less accuracy) than non-procrastinators under high but not low cognitive load conditions when the time span was limited and brief. In experiment 2 chronic procrastinators performed slower than non-procrastinators under a 2 second, but not under no limit, 1 second, or 4 second time limit conditions. Chronic procrastinators compared to non-procrastinators also performed more slowly and made more performance errors under objective self-awareness conditions regardless of the length of time. These experiments indicate that chronic procrastinators regulate ineffectively their performance speed and accuracy when they ,work under pressure' (defined by high cognitive load, objective self-awareness, and imposed time limitations). Copyright © 2001 John Wiley & Sons, Ltd. [source] Age Bias in the Workplace: The Impact of Ageism and Causal Attributions,JOURNAL OF APPLIED SOCIAL PSYCHOLOGY, Issue 6 2006Deborah E. Rupp This study considers the roles of managerial ageism and causal attributions in the age bias process. Specifically, we predicted that employee age and manager ageism would interact in predicting the severity of recommendations made about an employee's performance errors, such that ageist managers would be more likely to engage in age bias. Second, we proposed that age bias is caused partially by differential attributions made about the performance errors of older vs. younger workers. Results indicated that older employees received more severe recommendations for poor performance than did their younger counterparts. Also, some ageist attitudes moderated the relationship between age and performance recommendations. Stability attributions mediated the relationship of employee age on endorsement of the more punitive recommendations. [source] The effect of interpersonal competition on monitoring internal and external error feedbackPSYCHOPHYSIOLOGY, Issue 2 2010Catharina S. Van Meel Abstract The present study examined the effect of the social context on early emotional appraisal of performance errors and negative feedback reflected by the error-related negativity (ERN), feedback-related negativity (FRN), and P300. Participants performed a probabilistic learning task in which they received valid and invalid performance feedback. During one half of the task they were led to believe that they were competing online against another participant. As expected, the ERN following response errors was enhanced in the competition compared to the neutral condition. The FRN was more negative following negative compared to positive feedback and valid compared to invalid feedback, but only during competition. The P300 was larger to false positive than false negative feedback, which was independent of the social context. In conclusion, ERN and FRN, but not P300, may be sensitive to affective distress elicited by expectation violations during social interaction. [source] To PE or not to PE: A P3-like ERP component reflecting the processing of response errorsPSYCHOPHYSIOLOGY, Issue 3 2009K. Richard Ridderinkhof Abstract ERP studies have highlighted several electrocortical components that can be observed when people make errors. We propose that the PE reflects processes functionally similar to those reflected in the P3 and that the PE and P3 should covary. We speculate that these processes refer to the motivational significance of rare target stimuli in case of the P3 and of salient performance errors in case of the PE. Here we investigated whether PE amplitude after errors in a Simon task is correlated specifically to varying target,target intervals in a visual oddball task, a factor known to parametrically affect P3 amplitude. The amplitude of the PE, but not the NE, was observed to covary with the effect of target,target interval on P3 amplitude. The specificity of this novel finding supports the notion that the PE and P3 reflect similar neurocognitive processes as possibly involved in the conscious processing of motivationally significant events. [source] Alpha power is influenced by performance errorsPSYCHOPHYSIOLOGY, Issue 2 2009Joshua Carp Abstract Error commission evokes changes in event-related potentials, autonomic nervous system activity, and behavior, presumably reflecting the operation of a cognitive control network. Here we test the hypothesis that errors lead to increased cortical arousal, measurable as changes in electroencephalogram (EEG) alpha band power. Participants performed a Stroop task while EEG was recorded. Following correct responses, alpha power increased and then decreased in a quadratic pattern, implying transient mental disengagement during the intertrial interval. This trend was absent following errors, which elicited significantly less alpha power than correct trials. Moreover, post-error alpha power was a better predictor of individual differences in post-error slowing than the error-related negativity (ERN), whereas the ERN was a better predictor of post-error accuracy than alpha power. These findings imply that changes in cortical arousal play a unique role in modulating post-error behavior. [source] | ||||||||||