Alterations in error-related brain activity and post-error behavior over time

This study examines the relation between the error-related negativity (ERN) and post-error behavior over time in healthy young adults (N=61). Event-related brain potentials were collected during two sessions of an identical flanker task. Results indicated changes in ERN and post-error accuracy were related across task sessions, with more negative ERN associated with greater improvements in post-error accuracy. This relationship was independent of any cross-sectional relationships between overall task performance, individual difference factors, including personality and self-efficacy, and indices of self-regulatory action monitoring. These results indicate that the relation between ERN and post-error accuracy remains intact and consistent regardless of variation in this set of individual difference factors previously associated with both of these indices of self-regulatory action monitoring, providing support for the strength, robustness, and persistence of this relationship in the process of adaptively controlling behavior to enhance task performance.     

Modulatory effects of happy mood on performance monitoring: Insights from error-related brain potentials

Goal-adaptive behavior requires the rapid detection of conflicts between actions and intentions or goals. Although many studies have focused in the past on the influence of negative affect on this cognitive control process (and more specifically, on error monitoring), little is known about the possible modulatory effects of positive affect on it. To address this question, we used a standard (positive) mood induction procedure (based on guided imagery) and asked participants to carry out a speeded go/no-go task while high-density electroencephalography was recorded concurrently. As a control condition, we used a group with neutral mood. Event-related potential results showed that the error-related negativity (ERN) component, reflecting early error detection within the dorsal anterior cingulate cortex, was not influenced by happy mood. In contrast, the subsequent error positivity (Pe) component, related to the appraisal of the motivational significance of errors, was reliably smaller in the happy than in the neutral mood group. Complementing source localization analyses showed that this effect was explained by decreased activation within the posterior cingulate and insular cortices. These results were obtained in the absence of group differences regarding behavioral performance and tonic arousal. These findings suggest that happy mood likely decreases and changes the motivational significance of worse-than-expected events (Pe), while leaving their earlier automatic detection (ERN) unaltered. We discuss these new results in terms of dynamic changes in the complex interplay of performance monitoring with motivation.     

Confidence judgments in real classroom settings: monitoring performance in different types of tests

During testing, students have a valuable opportunity to exercise and improve their self-regulatory skills. However, the extent to which they profit from those experiences may vary according to some personal, test-related, and environmental factors. This study investigated the effects of metacognitive skills and test types on students' test performances, confidence judgments, and on the accuracy of those judgments. A sample of 129 psychology undergraduate students (50 men and 79 women, mean age = 18.9 years) were categorized according to their metacognitive skills (high vs average vs low) and had their test performances and monitoring processes in two different types of tests (i.e., multiple-choice and short-answer tests) compared throughout one academic term. Their test preparation practices, along with their attributional and regulatory processes during test-taking, were also compared by using open-ended questions. The results showed that: (1) high-metacognitive students presented more effective test preparation practices, better test performances, and superior attributional, regulatory, and monitoring processes than their counterparts; (2) differences in performance and judgment accuracy were significantly larger in the short-answer tests than in the multiple-choice tests; and (3) over time, students' performances and confidence levels varied in specific patterns according to the type of test being taken. The results are discussed, focusing on the educational implications of the interactions observed and on how they may determine what students can learn from test-taking experiences. In addition, based on the results obtained, specific suggestions on how to increase the metacognitive awareness of university students through instruction and on how to improve their academic assessment are provided.     

Performance monitoring and the causal attribution of errors

The present study investigated the role of causal attribution for performance monitoring in the medial frontal cortex. To this end, we compared internally and externally-caused errors in a selective attention task with respect to error-related EEG activity and error-induced adjustments of speed and attentional selectivity. Both error types evoked early negativities and later positivities in the response-locked event-related potential. However, whereas internally-caused errors caused posterror slowing, externally-caused errors were followed by reduced attentional selectivity. Moreover, the amount of reduced attentional selectivity was related to the amplitude of the early negativity on externally-caused errors. This suggests that posterror adjustments are initiated on the basis of perceived causality and, thus, causal attribution of errors.     

Integrating multiple perspectives on error-related brain activity: The ERN as a neural indicator of trait defensive reactivity

In the past 20 years, research concerning the error-related negativity (ERN), a negative-going deflection in the event-related brain potential (ERP) following an erroneous response, has flourished. Despite a substantial body of research, debate regarding its functional significance persists. In what follows, we selectively review literature on the ERN, and outline several prominent cognitive theories related to the generation and significance of the ERN. Cognitive theories predict that the size of the ERN should relate to variation in behavior, although there is substantial evidence that the ERN and behavioral measures are at least partially dissociable. Moreover, individual difference measures, psychopathology, and motivational factors all appear to impact basic mechanisms that generate the ERN to moderate the magnitude of the ERN, suggesting a need to integrate alternative perspectives into models of ERN amplitude. Insofar as errors prompt the mobilization of defensive responses, we view variation in the ERN in terms of error detection in the service of protecting the organism. Based on data indicating that the ERN is highly stable over time, heritable, and related to broad dimensions of personality, we propose that the ERN is a neural index of a neurobehavioral trait and variation in its amplitude is related in part to individual differences in defensive reactivity. Implications and future directions are considered.     

Response monitoring, the error-related negativity, and differences in social behavior in autism

Children with autism not only display social impairments but also significant individual differences in social development. Understanding the source of these differences, as well as the nature of social impairments, is important for improved diagnosis and treatments for these children. Current theory and research suggests that individual differences in response monitoring, a specific function of the anterior cingulate cortex (ACC), may contribute to social-emotional and social-cognitive impairments and individual differences in autism. To examine this hypothesis, we used a modified flanker task to assess an ERP index of response monitoring, the error-related negativity (ERN), in a sample of higher function children with autism (HFA) and an IQ-matched control sample. The results revealed a significant Diagnostic group by Verbal IQ interaction on ERN amplitude indicating that the most verbally capable HFA children displayed significantly larger ERN amplitudes than did the control children. Within the HFA sample, greater ERN amplitude was also related to parent reports of fewer symptoms of social interaction impairments, fewer internalizing problems, but more externalizing problems, although these associations were reduced to nonsignificance when medication status was controlled. The latter results complement previous observations from imaging studies of a significant association between ACC activity and social symptoms and impairments in autism. The implications of these results for future research on brain-behavior relations, as well as treatment related research with children with autism are discussed.     

The neural basis of error detection: conflict monitoring and the error-related negativity

According to a recent theory, anterior cingulate cortex is sensitive to response conflict, the coactivation of mutually incompatible responses. The present research develops this theory to provide a new account of the error-related negativity (ERN), a scalp potential observed following errors. Connectionist simulations of response conflict in an attentional task demonstrated that the ERN--its timing and sensitivity to task parameters--can be explained in terms of the conflict theory. A new experiment confirmed predictions of this theory regarding the ERN and a second scalp potential, the N2, that is proposed to reflect conflict monitoring on correct response trials. Further analysis of the simulation data indicated that errors can be detected reliably on the basis of post-error conflict. It is concluded that the ERN can be explained in terms of response conflict and that monitoring for conflict may provide a simple mechanism for detecting errors.     

Speed and accuracy in comparative judgments of line length

The paper presents an extension of Henmon’s (1906) finding that RT decreases as the difficulty of discriminating a difference between two line segments decreases. It is shown that, when an E RT deadline is imposed on the experimental task, RT remains constant with respect to changes in discrimination difficulty, but that correct response probability increases with increasing difference between two line segments. The data are examined in terms of current theories for the speed-accuracy trade-off.     

Fact and fantasy: the roles of accuracy and variability in confusing imaginations with perceptual experiences

In Experiment 1, pictures were presented to subjects two, five, or eight times, and subjects were asked to imagine each pciture two, five, or eight times. Subsequently, subjects estimated the number of times each picture had been presented. Their estimates of the frequency of these external events were influenced by imagination trials; this effect was greater for good imagers than for poor imagers. Experiment 2 involved a similar design in which subjects were asked either to imagine the same referent for a word or to imagine a different referent for a word on successive imagination trials. Consistency (same referent) did not increase the influence of imaginations on immediate judgments of external frequency. Thus, the results of Experiment 1 were attributed to the greater accuracy (as opposed to greater consistency) of good imagers' internal generations of the stimuli. Furthermore, variation (imagining different referents), like greater accuracy, increased the effects of imagination trials on immediate but not on delayed judgments of frequency. Possible mechanisms underlying these effects are discussed. In general, the two studies show that qualitative characteristics of completely covert generations influence their impact on estimates of the frequency of external events.     

Two effects of repetition: Support for a dual-process model of know judgments and exclusion errors

In three experiments, aremember/know recognition test (Experiments 1–2) and an exclusion test (Experiments 2–3) were used to examine effects of repeated study presentations. An effect of study repetition was obtained for remember but not know judgments, similar to results reported by Gardiner, Kaminska, Dixon, and Java (1996). Experiment 2 demonstrated the similarity between know responses and exclusion errors; neither was affected by repeated study presentations. In Experiment 3, a response deadline procedure was used to show that exclusion errors are the product of two opposing processes—recollection and familiarity—both of which are influenced by repetition. The interpretation of exclusion errors and know responses is shown to require a dual-process model that includes an assumption about the relationship between processes.     

The influence of delaying judgments of learning on metacognitive accuracy: a meta-analytic review

Many studies have examined the accuracy of predictions of future memory performance solicited through judgments of learning (JOLs). Among the most robust findings in this literature is that delaying predictions serves to substantially increase the relative accuracy of JOLs compared with soliciting JOLs immediately after study, a finding termed the delayed JOL effect. The meta-analyses reported in the current study examined the predominant theoretical accounts as well as potential moderators of the delayed JOL effect. The first meta-analysis examined the relative accuracy of delayed compared with immediate JOLs across 4,554 participants (112 effect sizes) through gamma correlations between JOLs and memory accuracy. Those data showed that delaying JOLs leads to robust benefits to relative accuracy (g = 0.93). The second meta-analysis examined memory performance for delayed compared with immediate JOLs across 3,807 participants (98 effect sizes). Those data showed that delayed JOLs result in a modest but reliable benefit for memory performance relative to immediate JOLs (g = 0.08). Findings from these meta-analyses are well accommodated by theories suggesting that delayed JOL accuracy reflects access to more diagnostic information from long-term memory rather than being a by-product of a retrieval opportunity. However, these data also suggest that theories proposing that the delayed JOL effect results from a memorial benefit or the match between the cues available for JOLs and those available at test may also provide viable explanatory mechanisms necessary for a comprehensive account.     

The influence of group discussion on performance judgments: rating accuracy, contrast effects, and halo

The authors investigated the effect of group discussion, such as may occur formally in panel interview scenarios, assessment centers, or 360-degree feedback situations, on judgments of performance. Research on group polarization suggests that the effect of group discussion combined with raters' preexisting impressions of ratees or interviewees should result in an extremitization of impressions. Thus, the authors hypothesized that group discussion would (a) make ratings less accurate, (b) polarize impressions that were already good or poor as reflected by greater contrast effects, and (c) increase positive halo. Results indicated that group discussion resulted in less accurate ratings and greater contrast effects. Additional analyses suggested that group discussion increased positive halo. The authors discuss implications for research on group or panel judgments.     

Speech errors, disfluencies, and self-repairs of stutterers in two accuracy conditions

The purpose of the present study was to see whether the covert repair hypothesis, which views normal disfluencies as the by-products of covert self-repairing of internal speech (programming) errors, applies to habitual stutterers. To this end, we examined the effects of emphasis on speech accuracy in stutterers on three sorts of incidents: speech errors, disfluencies (also including stuttering), and self-repairs. In a condition in which they performed a speech task under instructions stressing the accuracy of speaking, stutterers made considerably fewer speech errors, than in a condition in which speech accuracy could be ignored. On the other hand, disfluency and self-repair rates remained about the same. They did increase, however, relative to speech error rates with accuracy emphasis. A control group of normal speakers performed in a similar way. Apparently, disfluencies behaved like self-repairs. These results support the covert repair hypothesis of disfluency, both for stutterers and for normal speakers.     

Low accuracy in judgments of others' psychological well-being as seen from a phenomenological perspective

The generally low degree of agreement between self-ratings on personality traits and ratings by others may be interpreted from the viewpoint that self-reports reflect people's experience of themselves but not necessarily their behaviors. A detailed analysis of self and other ratings on subjective well-being as a central dimension of human experience is consistent with this phenomenological view. Ratings of well-being were not significantly correlated with rated behaviors either in self-ratings or in ratings by others. Screening subjects in terms of avowed consistency and observability on a trait did not improve self-other agreement for well-being, nor did it replicate the individual trait effects reported by Kenrick and Stringfield (1980). Judgments by others were found to have poor interjudge reliability and to reflect biases associated with projection of own well-being and a halo effect organized around the subject's perceived friendliness or likability. It was demonstrated that pooling the judgments of several observers should not and does not lead to accurate prediction of the phenomenal personality, and that accuracy may generally depend on the level of self-disclosure.     

On being sad and mistaken: mood effects on the accuracy of thin-slice judgments

A series of studies explored how sadness impacts the accuracy of social judgments. In Study 1, induced sadness led to reduced accuracy in judgments of teacher effectiveness from brief samples of nonverbal behavior (thin slices). In Study 2, sad participants showed reduced accuracy in judging relationship type from thin slices as well as diminished judgmental efficiency. Study 3 revealed that higher Beck Depression Inventory scores were associated with diminished accuracy on the Profile of Nonverbal Sensitivity. Finally, Study 4 tested the possibility that sadness impairs accuracy by promoting a more deliberative information-processing style. As expected, accuracy was higher among participants in a sad mood condition who completed the judgment task while simultaneously performing a distracting cognitive load task.     

Delayed judgments of learning cause both a decrease in absolute accuracy (calibration) and an increase in relative accuracy (resolution)

A version of the PRAM methodology that permits an analytical evaluation of judgment of learning (JOL) accuracy was used for the first time to assess absolute accuracy (specifically, calibration). Results are reported from a new experiment in which Swahili-English translation equivalents were studied, followed sometime later (either immediately, approximately 1 min, or approximately 8 min) by pre-JOL recall and JOLs, and followed eventually by final recall. The calibration accuracy for predicting final recall decreased as the delay between study and JOL increased, with the decrease being most dramatic when only items that were recalled at the time of the JOL were considered. In contrast, relative accuracy (as measured by an overall gamma) improved as the delay between study and JOL increased. Participants appear insensitive to the combined effects of the recallability of the items at the time of the JOLs and of the delay between JOL and testing on the accuracy of JOLs.