Task conflict and proactive control: A computational theory of the Stroop task.

Neutral affordances: Task conflict in the affordances task

It is commonly assumed that people can use advance cues to proactively prepare for conflict from distracting stimulus features, yet empirical findings remain inconsistent. We tested the hypothesis that nonarbitrary stimulus-response (S-R) mappings are a key determinant of cue effectiveness, as vocal Stroop tasks (with nonarbitrary color-naming responses) have shown reliable cue benefits, whereas manual Stroop tasks (with arbitrary key press responses) typically have not. Across five experiments, using a spatial Stroop task with nonarbitrary S-R mappings, we consistently found no evidence that participants used predictive cues to proactively resolve conflict on incongruent trials. Despite providing optimal preparation conditions (100% valid cues, 2,000 ms preparation time), cue benefits only emerged on congruent trials when task difficulty was increased substantially (50 ms stimulus presentation, Experiment 4), likely reflecting a strategic shortcut rather than enhanced proactive control. These findings demonstrate that nonarbitrary S-R mappings are not a sufficient condition for ensuring cue-based engagement of proactive control and challenge the assumption that this form of control is a readily deployable, domain-general mechanism. (PsycInfo Database Record (c) 2026 APA, all rights reserved).

Despite the intuition that attention can be willfully heightened on demand in response to warnings that alert people to impending distraction (e.g., "Pay attention!"), the empirical evidence for this notion from studies employing congruency pre-cues is surprisingly weak, posing a challenge to some theoretical accounts. Here, we examine this puzzle of profitless pre-cues via the first systematic review of the literature on pre-cues in conflict tasks (e.g., the Stroop task)-a classic instance of proactive cognitive control. We first outline important conceptual and methodological considerations to delineate the process of greatest theoretical and practical importance, namely, the volitional attenuation of distraction when the precise target and distractor features are not known in advance. This is followed by a comprehensive literature review, revealing limited evidence for the effective use of pre-cues to attenuate distraction in conflict tasks (and we note a similar status in adjacent fields, like task switching and visual search). To elucidate this puzzle, we synthesize key findings alongside design parameters employed across studies to develop a novel theoretical framework, called TEPID. TEPID proposes a two-phase model that highlights the interactivity of a small set of task-related factors(preparation time, cue type, response modality, and task type) and person-related factors (motivation andability) which we believe to be crucial for determining whether pre-cues are exploited to proactively modulate control. From this synthesis, several recommendations and predictions are derived to position the field for future investigations of proactive control using pre-cueing manipulations, as well as their translation to real-life applications.

According to the dual mechanism of control (DMC) framework, cognitive control can be recruited proactively to prevent response conflict when advance preparation is feasible or is up-regulated to overcome response conflict after it is detected. This study aimed at empirically dissociating proactive and reactive control processes proposed by the DMC and identifying corresponding event-related potential (ERP) correlates. Behavioral and electrophysiological indices of cognitive control were measured during a task-switch paradigm with or without informative advance cues, in which proactive control was feasible or not. Proactive control was associated with a (right-) frontal sustained ERP modulation during the cue-target interval. In line with the successful recruitment of proactive control, informative, as compared with uninformative, cue conditions were associated with reduced behavioral and ERP correlates of conflict. ERP correlates of conflict were evident both during conflict detection upon target presentation (N(inc)) and during conflict resolution-in particular, following uninformative cues. Reactive control assumed to support conflict resolution was associated with a (left-) frontal transient preresponse ERP modulation for uninformative, but not informative, cue conditions. Together, these data suggest that complementary proactive and reactive control processes operate in concert to flexibly support goal-directed behavior in response to variable task-demands, by either preventing or resolving response conflicts, as they are detected or anticipated.

Proactive and reactive control during emotional interference and its relationship to trait anxiety.

Although autism spectrum disorder (ASD) is characterized by deficits in cognitive control, our previous work has shown that preparatory, goal-directed cognitive processing (proactive control) may be preserved in children with ASD. We investigated whether proactive control is intact in adolescents and young adults with ASD, as well as how symptoms of ASD (repetitive behaviors) and psychopathology (Depressive, Anxiety, and Attention-Deficit/Hyperactivity Problems) are related to proactive control. Participants were adolescents and young adults with ASD (N = 44) and typical development (TD; N = 44). Proactive control was assessed using a picture-word Stroop paradigm where participants named animals depicted in drawings while ignoring a superimposed written animal word. Interference effects (reaction time (RT) differences between more difficult incongruent trials, where animal pictures and words prompted different responses, and simpler congruent trials, where animal pictures and words prompted the same response) were calculated for two versions of the Stroop Task: a mostly congruent (MC) block, where the majority of trials were congruent, and a mostly incongruent (MI) block, where most trials were incongruent. Proactive control was calculated as the reduction in interference in the MI block in comparison to the MC block. Proactive control did not differ between groups, indicating that proactive control is not impaired in adolescents and young adults with ASD. In ASD, depression symptoms were associated with reduced proactive control. Future research should investigate the effects of interventions targeting depression as well as interventions targeting proactive control processes in individuals with ASD and comorbid depression. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

Interference created by incongruent stimuli in the classic Stroop task appears to be a complex phenomenon, attributed to multiple sources: task conflict (created by the possibility of engaging both word reading and color naming), semantic conflict (created by incompatibility between the concepts denoted by the word and the color), and response conflict (created when the word and the color are associated with two different possible responses). This composite view has seen little use in other conflict tasks, even though interference might reflect multiple sources of conflict in those tasks as well. The current pre-registered study attempted to decompose interference in the classic flanker task. A sample of 130 participants from two countries identified a centrally presented letter while ignoring flanking stimuli, which could be of ten different types (from least to most expected interference: no flanker, simple dots, patches of random visual noise, meaningless simple shapes, meaningless complex shapes, meaningful pictograms, digits, non-response set letters, and letters belonging to the response set; congruent trials were also included as a reference). The results clearly showed cumulative levels of interference as flankers became processable, meaningful, and identifiable as a possible response, indicating that different types of conflict do contribute to interference in the flanker task. The results broadly map onto the task, semantic, and response types of conflict identified in the Stroop task, with a few nuances. Our findings suggest that the presence of multiple sources of conflict may be a very general phenomenon in conflict tasks, extending well beyond Stroop interference.

In conflict tasks like the Simon task, participants are instructed to respond to a task-relevant target dimension while ignoring additional distracting information. In the Simon task the distracting spatial information can be congruent or incongruent with the task-relevant target information, causing a congruency effect. As seen in the proportion congruency effect and the congruency sequence effect, this congruency effect is larger in mostly congruent blocks and following congruent trials, respectively. Common theories suggest that when the proportion of incongruent trials is high or after an incongruent trial, focus on the task-relevant target information is increased and distracting information is inhibited. In two experiments, we investigated how reward modulates these phenomena. Specifically, performance-contingent reward – but not non-contingent reward – increased the usage of the distracting information in mostly congruent blocks or following congruent trials, while the adaptation to incongruency (i.e., mostly incongruent blocks or preceding incongruent trials) was the same in all conditions. Additional diffusion model analyses found that this effect of performance-contingent reward was captured by the drift rate parameter. These results suggest an increased focus on the target information by incongruent trials independent from reward, while the adaptation to (mostly) congruent trials characterized by increased usage of distracting information can be motivationally boosted. That is, performance-contingent reward increases the use of congruent distracting information beyond a mere relaxation of the increased target-focus following (mostly) congruent trials.

Background: Cognitive control of brain regions can be determined by the tasks involving the cognitive control such as the color word Stroop task. Stroop task define the reduction in function in incongruent condition, which requires more attention and control of competitive responses.Objective: The purpose of this study was to evaluate the activity of brain using the Modified Conflict Stroop Task in Military Personnel.Material and Methods: In this applied experimental study, to specify the activity of different regions of brain in response to conflict Persian color-word Stroop task, 20 healthy persons participated in this study. To evaluate selective attention, the traditional color-word Stroop Task Model was modified, and the Stroop test was designed in high- and low-threat zones. We used functional magnetic resonance imaging (fMRI) to evaluate the brain activation during the Stroop task performance. The color-word Stroop task consists of incongruent, congruent, and neutral conditions, and the subjects were requested to carefully choose the correct answer.Results: The mean response time was longer in incongruent condition (867.6±193.5ms) compared to congruent and neutral conditions. Analysis of neuroimaging data revealed that the brain conflict-related regions are activated by the Stroop interference. In incongruent trial, the superior frontal gyrus (SFG) and inferior frontal gyrus (IFG) showed the most active and stronger BOLD responses. In congruent trials, the activation in the brain was less and had difference compared with incongruent trials. Conclusion: Our result offers that the frontal cortex and the anterior cingulate cortex are sensitive to different trials of Persian Stroop task. Using modified Stroop task, we determined the brain responses to the selective attention test.

Objective:Neuronal dysfunction of the locus coeruleus (LC), the primary producer of norepinephrine, has been identified as a biomarker of early Alzheimer's disease (AD) pathophysiology. Norepinephrine has been implicated in attentional control, and its reduced cortical circulation in AD may be associated with selective attentional difficulties. Additionally, greater pupil dilation indicates greater effort needed to perform a cognitive task, and greater compensatory effort to perform the digit span task has been found in individuals at risk for AD. In this study, we examined associations between a neuroimaging biomarker of the LC and pupil dilation during the Stroop task as a sensitive measure of attentional control.Participants and Methods:64 older adults without dementia were recruited from the San Diego community (mean [SD] age = 74.3 [6.3]; 39 cognitively unimpaired and 25 with mild cognitive impairment). All participants underwent magnetic resonance imaging of the LC and generated behavioral data from a computerized Stroop task that included 36 incongruent trials (e.g., GREEN presented in red ink), 36 congruent trials (e.g., GREEN presented in green ink), and 32 neutral trials (e.g., LEGAL presented in green ink) in a randomized presentation. Mean pupil dilation for each trial (change relative to baseline at the start of each trial) was measured at 30 Hz using the Tobii X2-30 system (Tobii, Stockholm, Sweden) and averaged within each Stroop condition. Paired t-tests assessed for differences in mean pupil dilation across incongruent and congruent Stroop conditions. Iterative re-weighted least squares regression was used to assess the association between a rostral LC contrast ratio measure derived from manually marked ROIs and mean pupil dilation during incongruent trials divided by congruent trials, adjusting for age, sex, and education. Follow-up analyses also assessed the association of these variables with mean reaction time (RT) for incongruent trials divided by congruent trials.Results:Mean pupil dilation significantly differed across conditions (t = 3.74, mean difference = .13, 95% CI [.06, .20]) such that dilation was higher during the incongruent condition (mean [SD] dilation = .18 [.38] mm) relative to the congruent condition (mean [SD] dilation = .05 [.35] mm). A significant association was observed between pupil dilation and LC contrast ratio, such that increased levels of mean dilation during incongruent trials relative to congruent trials were observed at lower levels of LC contrast ratio (i.e., lower LC integrity; r = -.37, 95% CI [-.55, -.13]). This association was not observed for mean dilation during only congruent trials (r = -.08, 95% CI [-.31, .18]). Additionally, neither LC contrast ratio [r = .24, 95% CI [-.02, .46]) nor mean incongruent/congruent pupil dilation (r = .14, 95% CI [-.13, .37]) were associated with incongruent/congruent RT.Conclusions:Findings suggest that increased pupil dilation during a demanding attentional task is indicative of increased compensatory effort needed to achieve the same level of performance for individuals with reduced LC biomarker integrity. Pupillometry assessment offers a low-cost, non-invasive, and scalable biomarker of LC dysfunction that may be indicative of preclinical AD.

Event Abstract Back to Event Influence of task structure on proactive recruitment of cognitive control Rasa Gulbinaite1 and Addie Johnson1 1 University of Groningen, Netherlands Resolving conflicts between responses is one of the key functions of cognitive control. According to dualistic accounts, conflicts can be resolved transiently in a default “reactive” manner, or more “proactively” by anticipating and preventing interference. In a task in which a relevant response dimension overlaps with an irrelevant stimulus location dimension (i.e., the Simon task), trials may be congruent (C; stimulus position on same side as response) or incongruent (I; stimulus position opposite to response). The Simon Effect is that responses are faster and more accurate on C than on I trials. The Simon Effect is often eliminated or reversed when trials are preceded by I rather than C trials, presumably because reactive control is triggered by the incongruent information present in the previous trial. To assess the role of proactive control in this task we manipulated the proportion of congruency repetition trials (i.e., C trials followed by C trials or I trials followed by I trials). Proactive control was expected to be more evident in a 50% than in a 70%-congruency repetition condition because the greater unpredictability inherent in the trial sequence in the former case necessitates greater control. Proactive control is resource demanding. Thus, only individuals with sufficient working memory capacity (WMC) were expected to utilize it. Evidence of proactive control was found for a high- but not for a low-WMC group, as indicated by a significant three-way interaction between congruency repetition condition, previous trial congruency and current trial congruency for the high- and not for the low-WMC group. The current study provides evidence that proactive and reactive cognitive control mechanisms can be dissociated by their sensitivity to implicit task structure. Keywords: cognitive control, Simon effect Conference: XI International Conference on Cognitive Neuroscience (ICON XI), Palma, Mallorca, Spain, 25 Sep - 29 Sep, 2011. Presentation Type: Poster Presentation Topic: Poster Sessions: Performance Monitoring and Cognitive Control Citation: Gulbinaite R and Johnson A (2011). Influence of task structure on proactive recruitment of cognitive control. Conference Abstract: XI International Conference on Cognitive Neuroscience (ICON XI). doi: 10.3389/conf.fnhum.2011.207.00276 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 21 Nov 2011; Published Online: 28 Nov 2011. Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Rasa Gulbinaite Addie Johnson Google Rasa Gulbinaite Addie Johnson Google Scholar Rasa Gulbinaite Addie Johnson PubMed Rasa Gulbinaite Addie Johnson Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.

Priming can affect naming colours using the study-test procedure. Revealing the role of task conflict

Conflict in the Stroop task is thought to come from various stages of processing, including semantics. Two-to-one response mappings, in which two response-set colors share a common response location, have been used to isolate stimulus-stimulus (semantic) from stimulus-response conflict in the Stroop task. However, the use of congruent trials as a baseline means that the measured effects could be exaggerated by facilitation, and recent research using neutral, non-color-word trials as a baseline has supported this notion. In the present study, we sought to provide evidence for stimulus-stimulus conflict using an oculomotor Stroop task and an early, preresponse pupillometric measure of effort. The results provided strong (Bayesian) evidence for no statistical difference between two-to-one response-mapping trials and neutral trials in both saccadic response latencies and preresponse pupillometric measures, supporting the notion that the difference between same-response and congruent trials indexes facilitation in congruent trials, and not stimulus-stimulus conflict, thus providing evidence against the presence of semantic conflict in the Stroop task. We also demonstrated the utility of preresponse pupillometry in measuring Stroop interference, supporting the idea that pupillary effects are not simply a residue of making a response.

Hypothesized top-down and bottom-up mechanisms of control within conflict-rich environments were examined by presenting participants with a Stroop task in which specific words were usually presented in either congruent or incongruent colors. Incongruent colors were either frequently (high contingency) or infrequently (low contingency) paired with the word. These items were embedded within lists consisting of either 100% congruent or 100% incongruent filler items to create mostly congruent or mostly incongruent lists. Results indicated a significant item-specific congruency effect, which was largest for high contingency responses and within mostly congruent lists. In addition, a significant listwide congruency effect was obtained, and this interacted with working memory capacity (WMC). There were larger listwide congruency effects for low WMC individuals. Finally, the pattern of Stroop interference across lists for low WMC individuals was dependent upon the congruency of the preceding trial. These results support multiple forms of cognitive control, as well as contingency learning, as mechanisms underlying proportion congruence effects in Stroop and other conflict tasks. These findings are interpreted within Braver, Gray, and Burgess's (2007) dual mechanisms of control theory.

Working memory (WM) has recently been described as internally directed attention, which implies that WM content should affect behavior exactly like an externally perceived and attended stimulus. We tested whether holding a color word in WM, rather than attending to it in the external environment, can produce interference in a color-discrimination task, which would mimic the classic Stroop effect. Over three experiments, the WM Stroop effect recapitulated core properties of the classic attentional Stroop effect, displaying equivalent congruency effects, additive contributions from stimulus- and response-level congruency, and susceptibility to modulation by the percentage of congruent and incongruent trials. Moreover, WM maintenance was inversely related to attentional demands during the WM delay between stimulus presentation and recall, with poorer memory performance following incongruent than congruent trials. Together, these results suggest that WM and attention rely on the same resources and operate over the same representations.