scholarly journals Neural substrates of intrinsically motivated perseverance in adolescents and adults

2020 ◽  
Author(s):  
Sarah M. Tashjian ◽  
Adriana Galván
Keyword(s):  
Negative Feedback ◽  
Performance Feedback ◽  
Relevant Information ◽  
Neural Substrates ◽  
Value Systems ◽  
Neural Systems ◽  
Adolescents And Adults ◽  
The Face ◽  
Human Participants ◽  
Multivariate Pattern

Perseverance decisions rely on the ability to motivate behavior despite failure. Although perseverance is widely recognized to confer psychological and achievement benefits, there is a dearth of understanding regarding neural systems underpinning intrinsically motivated perseverance. This study elicited perseverance decisions in 99 human participants ages 13-30 (61 females) using a new task and fMRI. Perseverers (versus non-perseverers) evinced increased neural response in the medial prefrontal cortex (mPFC) to goal-relevant information (performance feedback versus monetary reward) and positively valenced information (positive versus negative performance feedback). Multivariate pattern analysis revealed representation of positive and negative feedback were more similar for perseverers, but representation of positive feedback and money did not distinguish the groups. Younger participants were less likely to persevere and recruited the superior frontal gyrus (SFG) to a greater extent after negative feedback. These findings suggest perseverance targets motivational and value systems important for propelling action in the face of failure.

Neuropsychological impairment in patients with major depressive disorder: the effects of feedback on task performance

2003 ◽  
Vol 33 (3) ◽  
pp. 455-467 ◽  
Author(s):  
F. C. MURPHY ◽  
A. MICHAEL ◽  
T. W. ROBBINS ◽  
B. J. SAHAKIAN
Keyword(s):  
Working Memory ◽  
Negative Feedback ◽  
Performance Feedback ◽  
Visual Discrimination ◽  
Negative Reinforcement ◽  
Spatial Working Memory ◽  
Memory Task ◽  
Depressive Illness ◽  
Reversal Task ◽  
Depressed Patients

Background. Recent evidence suggests that an abnormal response to performance feedback may contribute to the wide-ranging neuropsychological deficits typically associated with depressive illness. The present research sought to determine whether the inability of depressed patients to utilize performance feedback advantageously is equally true for accurate and misleading feedback.Method. Patients with major depression and matched controls completed: (1) a visual discrimination and reversal task that featured intermittent and misleading negative feedback; and (2) feedback and no-feedback versions of a computerised test of spatial working memory. In the feedback version, negative feedback was accurate, highly informative, and could be used as a mnemonic aid.Results. On the Probability Reversal task, depressed patients were impaired in their ability to maintain response set in the face of misleading negative feedback as shown by their increased tendency to switch responding to the ‘incorrect’ stimulus following negative reinforcement, relative to that of controls. Patients' ability to acquire and reverse the necessary visual discrimination was unimpaired. On the Spatial Working Memory task, depressed patients made significantly more between-search errors than controls on the most difficult trials, but their ability to use negative feedback to facilitate performance remained intact.Conclusions. The present results suggest that feedback can have different effects in different contexts. Misleading, negative feedback appears to disrupt the performance of depressed patients, whereas negative but accurate feedback does not. These findings are considered in the context of recent studies on reinforcement systems and their associated neurobiological substrates.

scholarly journals Information-based taste maps in insular cortex are shaped by stimulus concentration

2019 ◽  
Author(s):  
E Porcu ◽  
KM Benz ◽  
F Ball ◽  
C Tempelmann ◽  
M Hanke ◽  
...  
Keyword(s):  
Complex Function ◽  
Insular Cortex ◽  
Population Level ◽  
Ingestive Behavior ◽  
Current Evidence ◽  
High Concentration ◽  
Potential Harm ◽  
Taste Processing ◽  
Human Participants ◽  
Multivariate Pattern

AbstractTaste processing is an essential ability in all animals signaling potential harm or benefit of ingestive behavior. Although the peripheral taste coding is well understood, current evidence for central taste processing remains contradictory. To address this issue, human participants judged pleasantness and intensity of low and high-concentration tastes (salty, sweet, sour, bitter) in two fMRI-experiments. High-resolution fMRI and multivariate pattern analysis were used to characterize taste-related informational content in human gustatory cortex (GC). Clusters within GC were narrowly tuned to specific tastants consistently across tasks. Importantly, taste concentrations completely altered the spatial layout of putative taste-specific maps with distinct, non-overlapping patterns for each taste category at different concentration levels. Together, our results point at population-level representations in human GC as a complex function of taste category and concentration.

scholarly journals Dissociation of early and late face-related processes in Autism Spectrum Disorder and Williams syndrome

2021 ◽  
Author(s):  
Alice Gomez ◽  
Guillaume Lio ◽  
Manuela Costa ◽  
Angela Sirigu ◽  
Caroline Demily
Keyword(s):  
Williams Syndrome ◽  
Autism Spectrum ◽  
Neural Signals ◽  
Face To Face ◽  
Face Features ◽  
Early Signal ◽  
Reverse Pattern ◽  
The Face ◽  
Evoked Activity ◽  
Multivariate Pattern

Abstract Williams syndrome (WS) and Autism Spectrum Disorders (ASD) are psychiatric conditions associated with atypical but opposite face-to-face interactions patterns: WS patients overly stare at others, ASD individuals escape eye contact. Whether these behaviors result from dissociable visual processes within the occipito-temporal pathways is unknown. Using high-density electroencephalography, multivariate pattern classification and group blind source separation, we searched for face-related neural signals that could best discriminate WS (N = 14), ASD (N = 14) and neurotypical populations (N = 14). We found two peaks in neurotypical participants: the first at 170ms, an early signal known to be implicated in low-level face features, the second at 260ms, a late component implicated in decoding salient face social cues. The late 260ms signal varied as a function of the distance of the eyes in the face stimulus with respect to the viewers’ fovea, meaning that it was strongest when the eyes were projected on the fovea and weakest when projected in the retinal periphery. Remarkably, both components were found distinctly impaired and preserved in WS and ASD. In WS, we could weakly decode the 170ms signal probably due to their relatively poor ability to process faces’ morphology while the late 260ms component shown to be eye sensitive was highly significant. The reverse pattern was observed in ASD participants who showed neurotypical like early 170ms evoked activity but impaired late evoked 260ms signal. Our study reveals a dissociation between WS and ASD patients and point at different neural origins for their social impairments.

scholarly journals How to design and set up a clinical trial part 1: the research question

2019 ◽  
Vol 12 (3) ◽  
pp. 111-116
Author(s):  
Amarpreet Atwal ◽  
Philip E Benson
Keyword(s):  
Clinical Trial ◽  
Clinical Trials ◽  
Clinical Relevance ◽  
Clinical Care ◽  
Research Question ◽  
Relevant Information ◽  
Evidence Base ◽  
Human Participants ◽  
Set Up

Data from clinical trials involving human participants are essential in establishing an evidence base about the safety and effectiveness of our treatments. This first article describes the steps involved in designing and setting up a clinical trial, from establishing the research question(s) to searching the literature. Acquiring some knowledge about how to set up a clinical trial will allow the conscientious clinician to use the most relevant information to provide the highest possible standards of clinical care for his/her patients. CPD/Clinical Relevance: Even if a clinician is not, has never been, nor is ever planning to be involved in research, he/she should understand and be able to interpret the data from clinical trials.

scholarly journals Vigor in the Face of Fluctuating Rates of Reward: An Experimental Examination

2011 ◽  
Vol 23 (12) ◽  
pp. 3933-3938 ◽  
Author(s):  
Marc Guitart-Masip ◽  
Ulrik R. Beierholm ◽  
Raymond Dolan ◽  
Emrah Duzel ◽  
Peter Dayan
Keyword(s):  
Reinforcement Learning ◽  
Computational Models ◽  
Average Rate ◽  
Empirical Studies ◽  
Empirical Work ◽  
Healthy Human ◽  
Average Return ◽  
The Face ◽  
Cost Of Time ◽  
Human Participants

Two fundamental questions underlie the expression of behavior, namely what to do and how vigorously to do it. The former is the topic of an overwhelming wealth of theoretical and empirical work particularly in the fields of reinforcement learning and decision-making, with various forms of affective prediction error playing key roles. Although vigor concerns motivation, and so is the subject of many empirical studies in diverse fields, it has suffered a dearth of computational models. Recently, Niv et al. [Niv, Y., Daw, N. D., Joel, D., & Dayan, P. Tonic dopamine: Opportunity costs and the control of response vigor. Psychopharmacology (Berlin), 191, 507–520, 2007] suggested that vigor should be controlled by the opportunity cost of time, which is itself determined by the average rate of reward. This coupling of reward rate and vigor can be shown to be optimal under the theory of average return reinforcement learning for a particular class of tasks but may also be a more general, perhaps hard-wired, characteristic of the architecture of control. We, therefore, tested the hypothesis that healthy human participants would adjust their RTs on the basis of the average rate of reward. We measured RTs in an odd-ball discrimination task for rewards whose magnitudes varied slowly but systematically. Linear regression on the subjects' individual RTs using the time varying average rate of reward as the regressor of interest, and including nuisance regressors such as the immediate reward in a round and in the preceding round, showed that a significant fraction of the variance in subjects' RTs could indeed be explained by the rate of experienced reward. This validates one of the key proposals associated with the model, illuminating an apparently mandatory form of coupling that may involve tonic levels of dopamine.

scholarly journals Abnormal Processing of Social Information from Faces in Autism

2001 ◽  
Vol 13 (2) ◽  
pp. 232-240 ◽  
Author(s):  
Ralph Adolphs ◽  
Lonnie Sears ◽  
Joseph Piven
Keyword(s):  
Social Cognition ◽  
Social Information ◽  
Relevant Information ◽  
Neural Substrates ◽  
Social Knowledge ◽  
Social Judgments ◽  
High Functioning ◽  
Impaired Ability ◽  
Socially Relevant ◽  
Underlying Processes

Autism has been thought to be characterized, in part, by dysfunction in emotional and social cognition, but the pathology of the underlying processes and their neural substrates remain poorly understood. Several studies have hypothesized that abnormal amygdala function may account for some of the impairments seen in autism, specifically, impaired recognition of socially relevant information from faces. We explored this issue in eight high-functioning subjects with autism in four experiments that assessed recognition of emotional and social information, primarily from faces. All tasks used were identical to those previously used in studies of subjects with bilateral amygdala damage, permitting direct comparisons. All subjects with autism made abnormal social judgments regarding the trustworthiness of faces; however, all were able to make normal social judgments from lexical stimuli, and all had a normal ability to perceptually discriminate the stimuli. Overall, these data from subjects with autism show some parallels to those from neurological subjects with focal amygdala damage. We suggest that amygdala dysfunction in autism might contribute to an impaired ability to link visual perception of socially relevant stimuli with retrieval of social knowledge and with elicitation of social behavior.

scholarly journals Perturbing Neural Representations of Working Memory with Task-irrelevant Interruption

2020 ◽  
Vol 32 (3) ◽  
pp. 558-569 ◽  
Author(s):  
Nicole Hakim ◽  
Tobias Feldmann-Wüstefeld ◽  
Edward Awh ◽  
Edward K. Vogel
Keyword(s):  
Working Memory ◽  
Memory Task ◽  
Relevant Information ◽  
Alpha Power ◽  
Neural Signals ◽  
Neural Representations ◽  
Contralateral Delay Activity ◽  
The Face ◽  
Task Irrelevant ◽  
The Impact

Working memory maintains information so that it can be used in complex cognitive tasks. A key challenge for this system is to maintain relevant information in the face of task-irrelevant perturbations. Across two experiments, we investigated the impact of task-irrelevant interruptions on neural representations of working memory. We recorded EEG activity in humans while they performed a working memory task. On a subset of trials, we interrupted participants with salient but task-irrelevant objects. To track the impact of these task-irrelevant interruptions on neural representations of working memory, we measured two well-characterized, temporally sensitive EEG markers that reflect active, prioritized working memory representations: the contralateral delay activity and lateralized alpha power (8–12 Hz). After interruption, we found that contralateral delay activity amplitude momentarily sustained but was gone by the end of the trial. Lateralized alpha power was immediately influenced by the interrupters but recovered by the end of the trial. This suggests that dissociable neural processes contribute to the maintenance of working memory information and that brief irrelevant onsets disrupt two distinct online aspects of working memory. In addition, we found that task expectancy modulated the timing and magnitude of how these two neural signals responded to task-irrelevant interruptions, suggesting that the brain's response to task-irrelevant interruption is shaped by task context.

PERSONALITY AND SOCIAL-EVALUATIVE ANXIETIES ASSOCIATED WITH RATING DISCOMFORT IN ANTICIPATED POSITIVE AND NEGATIVE FEEDBACK CONDITIONS

2002 ◽  
Vol 30 (4) ◽  
pp. 359-371 ◽  
Author(s):  
Thomas P. Sawyer ◽  
Lisa A. Hollis-Sawyer ◽  
Amanda Pokryfke
Keyword(s):  
Undergraduate Students ◽  
Negative Feedback ◽  
Performance Feedback ◽  
Positive Feedback ◽  
Test Performance ◽  
Inverse Relationship ◽  
Feedback Condition ◽  
Regression Analyses ◽  
Personality Dimensions ◽  
Positive And Negative Feedback

The purpose of this study was to assess the relationships between select personality dimensions, social-evaluative anxieties, and rating discomfort. Undergraduate students were told they would be giving test performance feedback to a confederate and were instructed on how to give this feedback, to some degree, based on condition. Correlation and regression analyses revealed some interesting patterns. Neuroticism was found to be significantly related to feelings of discomfort only under the positive feedback condition, while extraversion was found to be significantly related to feelings of discomfort only under the negative feedback condition. A significant inverse relationship was also found between both agreeableness and conscientiousness levels, and in reaction to giving positive feedback. Additional findings and implications are discussed.

scholarly journals A Distinct Role of the Temporal-Parietal Junction in Predicting Socially Guided Decisions

Science ◽  
2012 ◽  
Vol 337 (6090) ◽  
pp. 109-111 ◽  
Author(s):  
R. McKell Carter ◽  
Daniel L. Bowling ◽  
Crystal Reeck ◽  
Scott A. Huettel
Keyword(s):  
Pattern Analysis ◽  
Multivariate Pattern Analysis ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Incentive Compatible ◽  
Future Behavior ◽  
Human Participants ◽  
Multivariate Pattern ◽  
Distinct Role

To make adaptive decisions in a social context, humans must identify relevant agents in the environment, infer their underlying strategies and motivations, and predict their upcoming actions. We used functional magnetic resonance imaging, in conjunction with combinatorial multivariate pattern analysis, to predict human participants’ subsequent decisions in an incentive-compatible poker game. We found that signals from the temporal-parietal junction provided unique information about the nature of the upcoming decision, and that information was specific to decisions against agents who were both social and relevant for future behavior.

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