scholarly journals EXPRESS: The Contribution of Meaning to the Detection of Task Conflict

2021 ◽  
pp. 174702182110013
Author(s):  
Ronen Hershman ◽  
Yulia Levin ◽  
Joseph Tzelgov ◽  
Avishai Henik
Keyword(s):  
Reaction Time ◽  
Stroop Task ◽  
Color Word ◽  
Word Meaning ◽  
Conflict Detection ◽  
Pupil Dilation ◽  
Task Conflict ◽  
Information Conflict ◽  
And Task

The color-word Stroop task produces both information conflict (detection of the ink color vs. word meaning) and task conflict (respond to the ink color vs. read the word). In the present study we measured both reaction time and pupil dilation, and the neutral stimuli in our study were non-readable letter strings as well as meaningless non-readable stimuli (i.e., colored patches and abstract character strings). Our results showed slowest responses in the incongruent trials and fastest responses in the congruent trials. However, no differences were found between the investigated neutrals. In contrast, pupil dilation was largest in the incongruent trials and smallest in the neutral trials. Moreover, the more the neutral stimuli were meaningless, the less the pupil dilation that was observed. Our results suggest that non-word meaningless stimuli reduced task conflict (compared to all the investigated conditions). Neutral equivalence should be taken into consideration in Stroop and Stroop-like tasks.

scholarly journals Does Posture Influence the Stroop Effect?

2020 ◽  
Vol 31 (11) ◽  
pp. 1452-1460
Author(s):  
Emilie E. Caron ◽  
Michael G. Reynolds ◽  
Brandon C. W. Ralph ◽  
Jonathan S. A. Carriere ◽  
Derek Besner ◽  
...  
Keyword(s):  
Stroop Task ◽  
Stroop Effect ◽  
Color Word ◽  
Response Times ◽  
Word Meaning ◽  
Sample Sizes ◽  
Consistent Effect ◽  
The Difference

Rosenbaum, Mama, and Algom (2017) reported that participants who completed the Stroop task (i.e., name the hue of a color word when the hue and word meaning are congruent or incongruent) showed a smaller Stroop effect (i.e., the difference in response times between congruent and incongruent trials) when they performed the task standing than when sitting. We report five attempted replications (analyzed sample sizes: N = 108, N = 108, N = 98, N = 78, and N = 51, respectively) of Rosenbaum et al.’s findings, which were conducted in two institutions. All experiments yielded the standard Stroop effect, but we failed to detect any consistent effect of posture (sitting vs. standing) on the magnitude of the Stroop effect. Taken together, the results suggest that posture does not influence the magnitude of the Stroop effect to the extent that was previously suggested.

Semantic Conflict Processing in the Color-Word Stroop and the Emotional Stroop

2013 ◽  
Vol 27 (4) ◽  
pp. 149-164 ◽  
Author(s):  
Montserrat Zurrón ◽  
Marta Ramos-Goicoa ◽  
Fernando Díaz
Keyword(s):  
Stroop Task ◽  
Color Word ◽  
Event Related Potentials ◽  
Semantic Content ◽  
Emotional Stroop ◽  
Semantic Equivalence ◽  
Incongruent Color ◽  
Semantic Conflict ◽  
Related Potentials ◽  
Temporal Locus

With the aim of establishing the temporal locus of the semantic conflict in color-word Stroop and emotional Stroop phenomena, we analyzed the Event-Related Potentials (ERPs) elicited by nonwords, incongruent and congruent color words, colored words with positive and negative emotional valence, and colored words with neutral valence. The incongruent, positive, negative, and neutral stimuli produced interference in the behavioral response to the color of the stimuli. The P150/N170 amplitude was sensitive to the semantic equivalence of both dimensions of the congruent color words. The P3b amplitude was smaller in response to incongruent color words and to positive, negative, and neutral colored words than in response to the congruent color words and colored nonwords. There were no differences in the ERPs induced in response to colored words with positive, negative, and neutral valence. Therefore, the P3b amplitude was sensitive to interference from the semantic content of the incongruent, positive, negative, and neutral words in the color-response task, independently of the emotional content of the colored words. In addition, the P3b amplitude was smaller in response to colored words with positive, negative, and neutral valence than in response to the incongruent color words. Overall, these data indicate that the temporal locus of the semantic conflict generated by the incongruent color words (in the color-word Stroop task) and by colored words with positive, negative, and neutral valence (in the emotional Stroop task) appears to occur in the range 300–450 ms post-stimulus.

Influence of Team Potency and Task Conflict on Team Creativity

2011 ◽  
Author(s):  
Danielle A. S. Crough ◽  
Erika Robinson-Morral ◽  
Nicholas J. Arreola ◽  
Ben G. Wigert ◽  
Brad Hullsiek ◽  
...  
Keyword(s):  
Task Conflict ◽  
Team Creativity ◽  
Team Potency ◽  
And Task

scholarly journals Correlating cognition and cortical excitability with pain in fibromyalgia: a case control study

2021 ◽  
Vol 61 (1) ◽  
Author(s):  
Vikas Kumar Tiwari ◽  
Srishti Nanda ◽  
Suvercha Arya ◽  
Uma Kumar ◽  
Ratna Sharma ◽  
...  
Keyword(s):  
Reaction Time ◽  
Sleep Quality ◽  
Daytime Sleepiness ◽  
Case Control Study ◽  
Color Word ◽  
Case Control ◽  
Corticomotor Excitability ◽  
Word Task ◽  
Control Study

Abstract Background Fibromyalgia is a chronic pain disorder characterized by widespread musculoskeletal symptoms, primarily attributed to sensitization of somatosensory system carrying pain. Few reports have investigated the impact of fibromyalgia symptoms on cognition, corticomotor excitability, sleepiness, and the sleep quality — all of which can deteriorate the quality of life in fibromyalgia. However, the existing reports are underpowered and have conflicting directions of findings, limiting their generalizability. Therefore, the present study was designed to compare measures of cognition, corticomotor excitability, sleepiness, and sleep quality using standardized instruments in the recruited patients of fibromyalgia with pain-free controls. Methods Diagnosed cases of fibromyalgia were recruited from the Rheumatology department for the cross-sectional, case-control study. Cognition (Mini-Mental State Examination, Stroop color-word task), corticomotor excitability (Resting motor threshold, Motor evoked potential amplitude), daytime sleepiness (Epworth sleepiness scale), and sleep quality (Pittsburgh sleep quality index) were studied according to the standard procedure. Results Thirty-four patients of fibromyalgia and 30 pain-free controls were recruited for the study. Patients of fibromyalgia showed decreased cognitive scores (p = 0.05), lowered accuracy in Stroop color-word task (for color: 0.02, for word: 0.01), and prolonged reaction time (< 0.01, < 0.01). Excessive daytime sleepiness in patients were found (< 0.01) and worsened sleep quality (< 0.01) were found. Parameters of corticomotor excitability were comparable between patients of fibromyalgia and pain-free controls. Conclusions Patients of fibromyalgia made more errors, had significantly increased reaction time for cognitive tasks, marked daytime sleepiness, and impaired quality of sleep. Future treatment strategies may include cognitive deficits and sleep disturbances as an integral part of fibromyalgia management.

scholarly journals The effect of high-frequency rTMS of the left dorsolateral prefrontal cortex on the resolution of response, semantic and task conflict in the colour-word Stroop task

2021 ◽  
Author(s):  
Benjamin A. Parris ◽  
Michael G. Wadsley ◽  
Gizem Arabaci ◽  
Nabil Hasshim ◽  
Maria Augustinova ◽  
...  
Keyword(s):  
Prefrontal Cortex ◽  
Task Performance ◽  
Stroop Task ◽  
Word Reading ◽  
Reaction Times ◽  
Task Conflict ◽  
General Effect ◽  
Task Set ◽  
Left Dlpfc ◽  
Dorsolateral Prefrontal

AbstractPrevious work investigating the effect of rTMS of left Dorso-Lateral Prefrontal Cortex (DLPFC) on Stroop task performance reports no changes to the Stroop effect but reduced reaction times on both congruent and incongruent trials relative to sham stimulation; an effect attributed to an enhanced attentional (or task) set for colour classification. The present study tested this account by investigating whether, relative to vertex stimulation, rTMS of the left DLPFC modifies task conflict, a form of conflict that arises when task sets for colour classification and word reading compete, given that this particular type of conflict would be reduced by an enhanced task set for colour classification. Furthermore, the present study included measures of other forms of conflict present in the Stroop task (response and semantic conflict), the potential effects on which would have been hidden in previous studies employing only incongruent and congruent stimuli. Our data showed that left DLPFC stimulation had no effect on the magnitude of task conflict, nor did it affect response, semantic or overall conflict (where the null is supported by sensitive Bayes Factors in most cases). However, consistent with previous research left DLPFC stimulation had the general effect of reducing reaction times. We, therefore, show for the first time that relative to real vertex stimulation left DLPFC stimulation does not modify Stroop interference. Alternative accounts of the role of the left DLPFC in Stroop task performance in which it either modifies response thresholds or facilitates responding by keeping the correct response keys active in working memory are discussed.

The romance of working together: Benefits of gender diversity on group performance in China

2012 ◽  
Vol 65 (11) ◽  
pp. 1487-1508 ◽  
Author(s):  
Yan Zhang ◽  
LiWen Hou
Keyword(s):  
Group Performance ◽  
Group Identification ◽  
Gender Diversity ◽  
Positive Association ◽  
Task Conflict ◽  
Relationship Conflict ◽  
Future Research ◽  
Chinese Sample ◽  
Homogeneous Groups ◽  
And Task

The authors examine cross-cultural differences in the effects of gender diversity on group identification and performance using workgroups from American and Chinese firms. Nationality is found to moderate the relationship between gender diversity and group identification in that gender diversity associates more positively with group identification in Chinese workgroups than in American workgroups. Nationality does not moderate the gender diversity–group performance relationship: although the Chinese sample shows a positive association between gender diversity and group performance, the American sample shows no association. A second longitudinal study explores the mechanisms of relationship conflict and task conflict by which gender diversity benefits group performance in China. Results show that gender-diverse groups perform better than homogeneous groups by decreasing relationship conflict and task conflict. Future research directions and practical implications are discussed.

VIDEO GAMES AND THE ELDERLY

1997 ◽  
Vol 25 (4) ◽  
pp. 345-352 ◽  
Author(s):  
Jeffrey Goldstein ◽  
Lara Cajko ◽  
Mark Oosterbroek ◽  
Moniek Michielsen ◽  
Oscar Van Houten ◽  
...  
Keyword(s):  
Reaction Time ◽  
Video Games ◽  
Color Word ◽  
Reaction Time Task ◽  
Well Being ◽  
The Elderly ◽  
Self Report ◽  
Control Group ◽  
Word Test ◽  
Stroop Color Word Test

This study examined the effects of playing video games (Super Tetris) on the reaction time, cognitive/perceptual adaptability, and emotional well-being of 22 noninstitutionalized elderly people aged 69 to 90. Volunteers in an elderly community in the Netherlands were randomly assigned to a videogameplaying experimental group or a nonplaying control group. The televisions of the 10 videogame players were provided with Nintendo SuperNes systems. Participants played Super Tetris 5 hours a week for 5 weeks, and maintained a log of their play. Before and after this play period, measures of reaction time (Sternberg Test; Steinberg, 1969), cognitive/perceptual adaptability (Stroop Color Word Test; Stroop, 1935), and emotional well-being (self-report questionnaire) were administered. Playing video games was related to a significant improvement in the Sternberg reaction time task, and to a relative increase in selfreported well-being. On the Stroop Color Word Test, both the experimental and control groups improved significantly, but the difference between groups was not statistically significant. The videogame-playing group had faster reaction times and felt a more positive sense of well-being compared to their nonplaying counterparts. Consistent with previous research on video games and the elderly, the present study finds the strongest effects on measures of reaction time, and the weakest effects on cognitive performance measures. Explanations and alternative interpretations of these findings are discussed.

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