A computational model of fractionated conflict-control mechanisms in task-switching

  title={A computational model of fractionated conflict-control mechanisms in task-switching},
  author={Joshua W. Brown and Jeremy R. Reynolds and Todd Samuel Braver},
  journal={Cognitive Psychology},

Context Specificity of Post-Error and Post-Conflict Cognitive Control Adjustments

Evidence of generalized control following both high conflict correct trials and errors was explored in a task-switching paradigm and error-related control adjustments confer a generalized performance benefit and suggest dissociable mechanisms of post-conflict and post-error control.

Distinct but correlated latent factors support the regulation of learned conflict-control and task-switching

Cognitive control is guided by learning, as people adjust control to meet changing task demands. The two best-studied instances of "control-learning" are the enhancement of attentional task focus in

Switch probability context (in)sensitivity within the cognitive control network

A Tweaking Principle for Executive Control: Neuronal Circuit Mechanism for Rule-Based Task Switching and Conflict Resolution

This work proposes a “tweaking hypothesis” for task switching: a weak rule signal provides a small bias that is dramatically amplified by reverberating attractor dynamics in neural circuits for stimulus categorization and action selection, leading to an all-or-none reconfiguration of sensory-motor mapping.

Multiple conflict-driven control mechanisms in the human brain

  • T. Egner
  • Psychology
    Trends in Cognitive Sciences
  • 2008

Multiple cognitive control effects of error likelihood and conflict

The results suggest that the likelihood of premature versus tardy response errors can lead to multiple distinct control effects, which are independent of cognitive control effects driven by response conflict.

The influence of response conflict on voluntary task switching: a novel test of the conflict monitoring model

The conflict monitoring model of cognitive control posits that response conflict triggers a top-down enhancement of a task’s representation in working memory. In the present study, we conducted a

The influence of response conflict on voluntary task switching: a novel test of the conflict monitoring model

In two experiments, performance following incongruent trials was consistent with the conflict monitoring model, but performance following incorrect trials did not fit with the model’s predictions.



A computational model of anterior cingulate function in speeded response tasks: Effects of frequency, sequence, and conflict

Simulations conducted in a neural network model incorporating sequential priming mechanisms confirmed that a computational measure of response conflict was higher on low-frequency trials across all three tasks, and provided evidence for the functional role of conflict information in performance monitoring and optimization.

A Rational Analysis of Cognitive Control in a Speeded Discrimination Task

This work model a speeded discrimination task in which individuals are asked to classify a sequence of stimuli and explains performance from a rational perspective that casts the goal of individuals as minimizing a cost that depends both on error rate and reaction time.

Cognitive control mechanisms resolve conflict through cortical amplification of task-relevant information

A prominent model of how the brain regulates attention proposes that the anterior cingulate cortex monitors the occurrence of conflict between incompatible response tendencies and signals this

Anterior cingulate cortex and response conflict: effects of frequency, inhibition and errors.

The results are consistent with the hypothesis that the ACC serves as a generic detector of processing conflict arising when low-frequency responses must be executed, but also leave open the possibility that further functional specialization may occur within ACC subregions.

Conflict monitoring and cognitive control.

Two computational modeling studies are reported, serving to articulate the conflict monitoring hypothesis and examine its implications, including a feedback loop connecting conflict monitoring to cognitive control, and a number of important behavioral phenomena.

Dissociable Executive Functions in the Dynamic Control of Behavior: Inhibition, Error Detection, and Correction

The present study employed event-related fMRI and EEG data to investigate the biological basis of the cognitive control of behavior and highlighted how higher cognitive functions responsible for behavioral control can result from the dynamic interplay of distinct cortical systems.

Task Switching: A PDP Model

A parallel distributed processing model is presented that simulates this effect when subjects switch between word reading and color naming in response to Stroop stimuli and shows similar behavior when the parameters are set to random values, supporting Allport and Wylie's proposal.

Control of Cognitive Processes: Attention and Performance XVIII

The progress achieved in fractionating, localizing, and modeling control functions, and in understanding the interaction between stimulus-driven and voluntary control, takes research on control in the mind/brain to a new level of sophistication.

Modeling cognitive control in task-switching

  • N. Meiran
  • Psychology
    Psychological research
  • 2000
A quantitative model is suggested that participants dynamically control response accuracy by selective attention, in the particular paradigm being used, by controlling stimulus representation, and are less efficient in dynamically controlling response representation.

Inhibition of action rules

  • U. Mayr
  • Psychology
    Psychonomic bulletin & review
  • 2002
A new task-switching paradigm, in which action rules varied on a trial-by-trial basis while the relevant stimulus dimension remained invariant, allowed the implementation of a high proportion of completen−2 repetitions, and consistent with the inhibition view, set-alternation costs were obtained even for these constellations.