The Event-Related Potentials Responding to Outcome Valence and Expectancy Violation during Feedback Processing.

Feedback-related negativity (FRN) is believed to encode reward prediction error (RPE), a term describing whether the outcome is better or worse than expected. However, some studies suggest that it may reflect unsigned prediction error (UPE) instead. Some disagreement remains as to whether FRN is sensitive to the interaction of outcome valence and prediction error (PE) or merely responsive to the absolute size of PE. Moreover, few studies have compared FRN in appetitive and aversive domains to clarify the valence effect or examine PE's quantitative modulation. To investigate the impact of valence and parametrical PE on FRN, we varied the prediction and feedback magnitudes within a probabilistic learning task in valence (gain and loss domains, Experiment 1) and non-valence contexts (pure digits, Experiment 2). Experiment 3 was identical to Experiment 1 except that some blocks emphasized outcome valence, while others highlighted predictive accuracy. Experiments 1 and 2 revealed a UPE encoder; Experiment 3 found an RPE encoder when valence was emphasized and a UPE encoder when predictive accuracy was highlighted. In this investigation, we demonstrate that FRN is sensitive to outcome valence and expectancy violation, exhibiting a preferential response depending on the dimension that is emphasized.

Evaluative distractors modulate attentional disengagement: People would rather stay longer on rewards.

Attentional disengagement is of great significance to individuals adapting to their environment who can benefit from disregarding the attraction of salient and task-irrelevant objects. Previous studies have suggested that, in addition to causing greater financial loss compared with neutral distractors, reward distractors hold attention longer than neutral distractors. However, few studies have directly compared the attentional disengagement differences between reward-associated and loss- or punishment-associated stimuli. In the current study, we used different color singleton stimuli tied to reward or punishment outcomes; the stimuli were present in the center of the screen. Participants were required to respond to a line within the target at a peripheral location. The results showed that the response to the target was slower when the central distractor was associated with a reward than with punishment. This finding reflects that, although participants understand that reward-associated and punishment-associated stimuli have an equal opportunity for the same economic benefit, they still take longer to disengage from a reward distractor compared with a punishment distractor.

[The influence of reward motivation on emotion regulation].

The influence of reward on behavior is one of the hottest research subjects in psychological research. Reward-induced motivation promotes the performance of the participants. In the field of emotional processing, the reward can influence the individual's processing of emotional information, but previous studies have not directly discussed the effect of reward on emotional regulation. The present study focused on whether emotional regulation ability would be improved under the reward condition. Experiment 1 and 2 investigated the effect of reward on negative emotional down-regulation and positive emotional up-regulation respectively. In experiment 1, monetary reward stimulation was introduced on the basis of the classic emotion regulation paradigm, and the subjects were asked to regulate their negative emotion under the condition of reward or non-reward, and evaluate their current affective state subsequently. Similar to experiment 1, experiment 2 required subjects to up-regulate positive emotions under the condition of reward or non-reward. The results of experiment 1 showed that under the reward condition, the negative emotional regulation effect was significantly higher than that under the non-reward condition (P < 0.05). Experiment 2 also showed that compared to non-reward condition, the positive emotion regulation effect was significantly increased under the reward condition (P < 0.05). These results suggested that compared to non-reward condition, participants can regulate their emotion better under the condition of the reward. It is worth noting that the results of Experiment 1 and 2 may be caused by the incentive motivation induced by monetary stimulus, or the positive emotion caused by positive value of money information. Therefore, we carried out experiment 3 and 4 to explore whether the positive emotions induced by money itself can influence the emotional regulation of individuals. In experiment 3, the money pictures were used to induce the positive emotions of subjects, and the subjects were asked to regulate their negative emotion after the presence of money pictures or non-monetary picture, and evaluate their current affective state subsequently. Similarly, experiment 4 required subjects to regulate their positive emotion after the presence of money pictures. The results of experiment 3 and 4 showed that there was no significant difference in the subjects' scores of emotional pleasantness after the presence of money pictures or non-monetary picture (P < 0.05). The results of experiment 3 and 4 excluded the possibility that the positive emotions induced by simple money stimulus pictures could improve individual's emotional regulation ability. To sum up, the improvement of individual's emotional regulation ability was indeed driven by reward motivation in this study, that is, the motivation induced by reward can effectively promote individual's emotional regulation ability.

The impact of extraversion on attentional bias to pleasant stimuli: neuroticism matters.

The present study explored whether neuroticism modulates the impact of extraversion on attention orienting to pleasant and unpleasant pictures of diverse emotional intensities. We measured event-related potentials for highly emotional, mildly emotional, and neutral stimuli in both pleasant and unpleasant blocks, while subjects (16 stable ambiverts, 15 stable extraverts, 17 neurotic ambiverts, and 17 neurotic extraverts) were asked to perform a standard/deviant categorization task, irrespective of the emotionality of the deviants. The results revealed a modulation effect of neuroticism in the impact of extraversion on emotional attention. On the one hand, irrespective of extraversion, emotionally stable samples showed increased N200 amplitudes for highly unpleasant (HN) stimuli relative to mildly unpleasant (MN) and neutral stimuli, while these samples exhibited no significant emotion magnitude effect in the pleasant block. On the other hand, although neurotic samples, both extraverts and ambiverts, showed enhanced N2 amplitudes for HN stimuli than neutral stimuli, neurotic extraverts displayed increased N2 amplitudes for highly pleasant (HP) and mildly pleasant (MP) stimuli than neutral stimuli, which was absent in neurotic ambiverts. These results extend our understanding of the relationship between extraversion and emotion by showing that neuroticism amplifies the positive emotional bias of extraverts.

Task-general or specific: The alertness modulates post-error adjustment.

Previous studies have shown that alertness is closely related to executive control function, but its impact on components of post-error adjustment is unknown. This study applied the Attentional Networks Test and the Four-choice Flanker task with three response stimulus intervals (RSIs) to explore the correlation between alertness and post-error adjustment. The linear mixed-effects model of alertness and RSI on the post-error processing indicators showed a significant negative correlation between the alertness and post-error slowing (PES) under 200 ms RSI , as well as between alertness and post-error improvement in accuracy (PIA) under both 700 ms RSI and 1200 ms RSI. Participants with lower alertness showed larger post-error slowing in the early stages, while those with higher alertness had smaller PIA in later stages. This study revealed the effects of alertness on different processing components of post-error adjustment. The control strategies utilized by individuals with high and low levels of alertness differed in preparation for performance monitoring. Alertness improved post-error response speed in a task-unspecific manner, but not post-error adaptation.

Neural and Behavioral Measures of Stress-induced Impairment in Error Awareness and Post-error Adjustment.

Exposure to stress negatively affects error processing, but the impact of stress on error awareness remains to be determined. In the present study, we examined the temporal dynamics of error awareness and post-error adjustment following acute stress. Forty-nine healthy men were randomly assigned to the control (n = 26) or stress group (n = 23). After stress induction, participants completed the error awareness task, and their brain activity was assessed by electroencephalography. Compared to the control group, the stress group demonstrated lower error awareness accuracy and smaller Pe (error positivity) and ΔPe amplitudes following aware error responses, which indicated impairment of error awareness following stress. Furthermore, the stress group had lower accuracy in post-aware error responses than in post-unaware error responses and the control group, which indicated poor post-error adjustment following stress. Our results showed a stress effect on sequential stages of error processing. Stress induces impaired error identification, which further generates maladaptive post-error performance.

Timing characteristics of reactive and proactive emotion regulation.

The dual mechanisms of control (DMC) framework is important for portraying two temporally distinct modes of cognitive control. In parallel with this model, understanding emotion regulation (ER) from a dual-mechanism perspective becomes plausible since cognitive control is a crucial element of ER. The present study characterized reactive and proactive ER based on a dual mechanisms framework to identify their distinct temporal dynamics using electroencephalography (EEG) recordings. The reappraisal cue, compared with the watch-cue and no-cue conditions, evoked a larger fronto-central P3a magnitude, suggesting that participants could adaptively distribute their attention resources to prepare for strategy use. To track the cognitive effort that supports the ER process, we measured the frontal late positive potential (LPP). The results indicated that the reactive group, compared with the proactive group, used more effort to complete the reappraisal task when participants were subjected to decreased negative-emotional experiences to the same degree. Furthermore, decoding analysis showed that proactive ER starts earlier than reactive ER. These findings highlight the advantages of proactive ER. Further understanding of the modes of ER will help elucidate the control mechanisms underlying ER, which can then be applied to a variety of conditions, such as alcoholism, gambling, and drug addiction, to avert self-regulation failures caused by negative emotions.

Improving adaptive response to negative stimuli through non-emotional working memory training.

People with high working memory (WM) capacity tend to respond proactively and experience a decrease in undesired emotions, implying the potential influence of WM training on emotional responses. Although training emotional WM could enhance emotional control, the training also improves emotional response itself. Thus, the far-transfer effects of non-emotional WM training on emotional responses remain an open question. In the present study, two experiments were conducted to detect these effects. The Preliminary experiment matched the expectations of the gains of the training tasks between the experimental and active control groups (n = 33). In Experiments 1 and 2, participants performed 7-day and 15-day training procedures, respectively. Results indicated that after a 7-day training, non-emotional WM training (n = 17) marginally reduced individuals' emotional responses compared with the active control group (n = 18); importantly, this improvement became significant after a 15-day training (n (WM training) = 20, n (active control) = 18). A combination analysis for Experiments 1 and 2 showed that training gains on WM performance were significantly related to reduced emotional responses (r = -0.359), indicating a dosage effect. Therefore, non-emotional WM training provides a safe and effective way to enhance adaptive emotional responses.

Stress-induced impairment reveals the stage and features of post-error adaptive adjustment.

An increased reaction time often occurs after error responses (post-error slowing, PES). However, the role of top-down regulation in post-error processing remains to be debated. Impairing cognitive control function through acute stress would help to investigate the role and stage of top-down adaptive regulation in post-error processing. Here, we recruited 50 healthy male participants who were randomly assigned to either a stress condition (Trier Social Stress Task, TSST) or a control condition (control version of the TSST). A color-word Stroop task with different response stimulus intervals (RSIs) was used to investigate the effects of acute stress on different stages of post-error processing. The results showed that cortisol, heart rate, perceived stress level, and negative affect were higher in the stress group (n = 24) than in the control group (n = 26), indicating successful stress induction. The accuracy of post-error response in the control group increased with the extension of RSI, and the reaction time decreased. However, the accuracy of 1,200 ms RSI was close to that of 700 ms RSI in the stress group but was significantly lower than that in the control group. The results suggested that acute stress caused the impairment of top-down adaptive regulation after error. Furthermore, our study manifested adaptive adjustment only in the late stages of post-error processing, indicating the phasic and adaptive features of post-error adjustment.

Improving Emotion Regulation Through Real-Time Neurofeedback Training on the Right Dorsolateral Prefrontal Cortex: Evidence From Behavioral and Brain Network Analyses.

We investigated if emotion regulation can be improved through self-regulation training on non-emotional brain regions, as well as how to change the brain networks implicated in this process. During the training period, the participants were instructed to up-regulate their right dorsolateral prefrontal cortex (rDLPFC) activity according to real-time functional near-infrared spectroscopy (fNIRS) neurofeedback signals, and there was no emotional element. The results showed that the training significantly increased emotion regulation, resting-state functional connectivity (rsFC) within the emotion regulation network (ERN) and frontoparietal network (FPN), and rsFC between the ERN and amygdala; however, training did not influence the rsFC between the FPN and the amygdala. However, self-regulation training on rDLPFC significantly improved emotion regulation and generally increased the rsFCs within the networks; the rsFC between the ERN and amygdala was also selectively increased. The present study also described a safe approach that may improve emotion regulation through self-regulation training on non-emotional brain regions.

Error-induced adaptability: Behavioral and neural dynamics of response-stimulus interval modulations on posterror slowing.

Response errors often cause individuals to slow down their subsequent reactions (posterror slowing [PES]). Despite intensive investigations on PES, the adaptive nature of PES remains unresolved. Here, we systematically examined this issue by manipulating response-stimulus intervals (RSIs) and examining their influence on behaviors and neural dynamics of PES. Behavioral and electrophysiological (EEG) measures were recorded while male and female human participants performed a four-choice flanker task as RSIs were manipulated. Behaviorally, PES showed maladaptive features at short RSIs but some adaptive features at long RSIs. EEG results indicated that RSIs did not affect basic error-related processing, indexed by the same pattern in the contrasts between flanker errors and correct responses on the error-related negativity (ERN), error positivity (Pe), or theta band, no matter at short or long RSIs. However, RSIs significantly influenced postflanker error attentional adjustment, motor inhibition, and sensory sensitivity. At short RSIs, compared with postcorrect trials, postflanker error trials elicited larger beta band power and smaller P1 amplitude but did not affect alpha band power, suggesting that motor processing was inhibited, and subsequent sensory processing was impaired, but no attentional adjustment occurred. By contrast, at long RSIs, postflanker error trials led to smaller alpha and beta band power but did not affect P1 amplitude, indicating that attentional adjustment but not motor inhibition occurred, and sensory processing was not impaired. Together with behavioral results, the current study demonstrated that PES was adaptive at long RSIs but maladaptive at short RSIs. We further discuss the role of central resources in the adaptability of PES. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Gender Role, But Not Sex, Shapes Humans' Susceptibility to Emotion.

It is unknown whether the famous sex-related difference in emotion processing is accounted for by biological sex, gender role, or their interaction. To clarify the issue, in Study 1 we recorded event-related potentials in response to negative and positive images of diverse intensities when 47 masculine (26 males) and 47 feminine (22 males) subjects performed a non-emotional task. The occipital P1 and N1 amplitudes were larger in women than in men, while feminine subjects showed larger N1 amplitudes than masculine subjects, regardless of sex. Moreover, feminine subjects showed enhanced frontocentral N2 (210-270 ms) amplitudes for highly and mildly negative than for neutral stimuli, while masculine subjects showed an emotion effect only for highly negative stimuli. The feminine-specific effect for mildly negative stimuli was positively correlated to the feminine score, and this correlation was located to the anterior cingulate and the superior and medial frontal gyri. Furthermore, feminine but not masculine subjects showed enhanced parietal P3 (330-560 ms) amplitudes for highly and mildly positive than for neutral stimuli, an effect positively related to the feminine score and localized to the precuneus, posterior cingulate, and superior temporal gyrus. Machine learning analyses verified that single-trial N2 and P3 amplitudes of feminine subjects reliably discriminated the intensity of negative and positive stimuli, respectively. For ecological considerations, in Study 2 we used an observational approach (n = 300) and confirmed that feminine gender role, rather than biological sex, predicted individual differences in daily experience of emotion-related psychopathological symptoms. These findings provide solid evidence for the critical impact of gender role rather than sex on emotional susceptibility.

The modulation of salience and central executive networks by acute stress in healthy males: An EEG microstates study.

EEG microstate analysis involves the examination of topographies of the scalp potential fields to indicate the temporal dynamics of resting-state networks on a millisecond time scale, through which we can investigate the subsecond brain dynamics of stress in individuals. The present study implemented the EEG microstate method to explore the temporal dynamic changes of the large-scale brain networks induced by acute stress. The participants (n = 51) were randomly exposed to a stress condition (n = 25) (induced by Trier Social Stress Test, TSST) or a control condition (n = 26). Two 4-min blocks of resting EEG data were recorded before and after the stress/control test to reflect the stress effect on temporal dynamics of EEG microstates. The results showed that the stress group had larger occurrences and coverage of microstate class C during the post-test session than during the pre-test session. This pattern was reversed in the control group. Further, the microstate class C showed positive correlations with negative affect and perceived stress levels following acute stress. The transition probability between the microstates C and D was larger during the post-test session than during the pre-test session in the stress group, but not different in the control group. In addition, the microstate pairs C and D were positively correlated with negative affect and perceived stress levels. The proportion and sequence of EEG microstates class C and D reflected deviations of salience and executive functions following acute stress. We further proposed that the coordination between salience and executive functions was promoted by acute stress.

N-Back Task Training Helps to Improve Post-error Performance.

Improved performance on working memory (WM) through training has been widely expected to transfer to other domains. Recent studies have proposed that WM training could enhance the autonomous coordination of WM processes. Based on the shared processes between WM and error processing, our present study explored the transfer effect of 15 days of training on post-error performance, during the n-back task, compared to a simple visual search task. Participants were randomly assigned to either the training (N = 22) or control (N = 18) group. We found that WM training successfully improved WM performance. After training, compared with the control group, the training group showed a significant reduction in post-error slowing (PES); however, post-error accuracy and the flanker effect were not modulated by WM training. Moreover, we observed a significant, negative correlation between the changes in PES and WM from pretest to posttest and classified two groups based on these changes in PES with 70% accuracy. Thus, in our present sample, WM training improved post-error performance. We propose that the skill of controlling information flow, developed during WM training, is transferable to other tasks and discuss the implications of current findings for understanding the generation of PES.

Androgyny eliminates sex differences in emotional reactivity: ERP and network coupling evidences.

The role of gender role in interpreting sex differences in emotion is unknown. The present study examined how gender role moderates sex differences in emotional reactivity. Event-related potentials (ERP) were recorded in sixty-eight subjects with typical or androgynous gender roles when they passively observed neutral and negative pictures. Behaviorally, typical females (feminine females) reported higher emotional rating than typical males (masculine males), while androgynous males and androgynous females reported no significant differences. Electrophysiologically, we found higher late positive potential (LPP) amplitude in typical females compared to typical males, while this pattern of sex difference was absent in androgynous subjects. The network analysis of EEG data indicates that typical males showed enhanced network coupling strengths between frontal/prefrontal and parietal areas than typical females, which was again absent in androgynous subjects. These findings suggest that gender role is an important determinant in the interpretation of sex differences in emotional reactivity.

Suggestion of cognitive enhancement improves emotion regulation.

Cognitive training seems a promising approach to enhance emotion regulation. To establish a causal connection, researchers must compare the training intervention with a control group that accounts for improvements induced by some factors other than the training. Despite this familiar methodology, the influence of expectations on the transfer effects of training remains poorly understood. We tested this possibility in 2 experiments, where a procedure was designed to intentionally induce a placebo effect via the suggestion of cognitive enhancement to evaluate the role of expectation in emotion regulation gains from cognitive training. Both the Placebo and Control groups completed the identical short-term working memory training (20 min) in Experiment 1. New participants were recruited to complete a long-term pseudotraining program (7 days) in Experiment 2. The results from the 2 experiments consistently showed that the Placebo group, who expected benefits from the training, unlike the Control group, showed less negative emotion and better regulatory effects after pseudotraining, irrespective of the duration of the training. Thus, inadequate control of expectation is a fundamental design flaw that potentially undermines any causal inferences. These findings also suggest a novel perspective for optimizing the experimental designs in psychological interventions and advancing the understanding of emotion regulation enhancement. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

The state of memory-matched distractor in working memory influence the visual attention.

Information in working memory (WM) can guide visual attention towards matched features. While recent work has suggested that cognitive control can act upon WM guidance of visual attention, little is known about how the state of memorized items retaining in WM contribute to its influence over attention. Here, we disentangle the role of inhibition and maintenance on WM-guided attention with a novel delayed match-to-sample dual-task. The results showed that active inhibition facilitated searching by diminishing sensory processing and deterring attentional guidance, indexed by an attenuated P1 amplitude and unaffected N2pc amplitude, respectively. By contrast, active maintenance impaired searching by attentional guidance while sensory processing remained unimpaired, indexed by an enhanced N2pc amplitude and unchanged P1 amplitude, respectively. Furthermore, multivariate pattern analyses could sucessfully decode maintenance and inhibition, suggesting that two states differed in modulating visual attention. We propose that remembered contents may play an anchoring role for attentional guidance, and the state of those contents retaining in WM may directly influence the shifting of attention. The maintenance could guide attention by accessing input information, while the inhibition could deter the shifting of attention by suppressing sensory processing. These findings provide a possible reinterpretation of the influence of WM on attention.

Temporal dynamic modulation of acute stress on error processing in healthy males.

Error processing is critical for adaptive behaviors. Acute stress has been found to influence error processing. However, the neural dynamic correlates underlying this modulation remain elusive. To address this issue, we recruited 39 healthy male participants, who performed a two-session task before and after an acute stress test while their behavioral and EEG data were recorded. The participants were randomly exposed to either a stress condition (Maastricht Acute Stress Test) or a control condition. The stress test consisted of several hand immersion tasks (ice-cold water, 2°C) and mental arithmetic tasks. A color-word Stroop task was used to investigate the stress effect on error responses. Based on the level of stress-induced cortisol, the participants in the stress group were further classified as low (N = 13) or high (N = 13) cortisol responders. The results indicated that only in the high cortisol responders, the error-related negativity (ERN) amplitude was reduced after acute stress. In addition, the ∆ERN in the high cortisol responders was significantly smaller than that in the low cortisol responders. These results suggest that acute stress impairs error detection. However, the error positivity amplitudes increased in the stress group compared to the control group, indicating that acute stress leads to greater error assessment. Taken together, these results suggest that acute stress impairs error detection, which is modulated by individuals' response level following acute stress, and leads to more emotional and/or motivational responses to the error signal once the error is consciously realized.

Regulatory effect of implicit acceptance during outcome evaluation: The temporal dynamics in an event-related potential study.

The acceptance of emotion is important for humans' wellbeing and social functioning. Despite its regulatory advantages, the temporal dynamics of acceptance for regulating decision-related emotion remains unclear. For this purpose, Event-related potentials were recorded for outcome presentation, when participants either in explicit or implicit acceptance condition performed a Gambling Task. Results showed that acceptance effectively regulated emotional experiences, irrespective of how it was realized (explicit/implicit). Compared to viewing condition, explicit acceptance increased overall amplitudes of feedback-related negativity (FRN,180-240 ms) at the early stage and reduced P3 amplitude (240-440 ms) in general at the late stage, regardless of feedback valence or magnitude. By contrast, implicit acceptance did not influence the FRN amplitudes but increased the P3 amplitudes globally, an effect unaffected by feedback valence and magnitude. In addition, the P3 amplitude for explicit acceptance was negatively correlated with the ratio of risky choices, regardless of outcome valence. These results suggest that explicit acceptance is associated with cognitive conflict and resource depletion, while these adverse effects are not engendered during implicit acceptance. These regulatory effects are independent of specific feedback valence and magnitude. These findings highlight the role of implicit acceptance in cognitive demanding context, such as decision-making.

Automatic self-focused and situation-focused reappraisal of disgusting emotion by implementation intention: an ERP study.

Detachment (self-focused) and positive reinterpretation (situation-focused) are two important forms of cognitive reappraisal during emotion regulation. Previous research shows situation-focused reappraisal to be more effective than self-focused reappraisal for intentional emotion regulation. How the two differ in emotional consequences as components of automatic emotion regulation is however unclear. In the current study, event-related potentials were recorded to clarify this problem, while participants passively viewed disgusting or neutral scenes or formed implementation intentions based on self-focused or situation-focused reappraisal. Behavioural results showed fewer negative emotions during self-focused reappraisal than during either situation-focused reappraisal or free viewing (which had similar emotion ratings). In addition, self-reported cognitive cost was not enhanced during the two forms of reappraisal compared to passive viewing. Late positive potential (LPP) amplitudes for disgusting stimuli were larger than those elicited for neutral stimuli, at both frontal and posterior-parietal regions. This amplitude enhancement effect, irrespective of whether frontal or parietal LPP were involved, was found to be weaker during self-focused reappraisal than when participants were engaged in situation-focused reappraisal or passive viewing. The latter two conditions showed similar amplitude enhancement. These findings suggest that automatic self-focused reappraisal by implementation intention produces more favourable emotion regulation than situation-focused reappraisal, without enhancing cognitive cost.