Search results for "Task engagement"

showing 3 items of 3 documents

Boosting working memory with accelerated clocks

2021

Our perception of time varies with the degree of cognitive engagement in tasks. The perceived passage of time accelerates while working on demanding tasks, whereas time appears to drag during boring situations. Our experiment aimed at investigating whether this relationship is mutual: Can manipulated announcements of elapsed time systematically affect the attentional resources applied to a cognitive task? We measured behavioral performance and the EEG in a whole report working memory paradigm with six items of different colors that each had to be reported after a short delay period. The 32 participants were informed about the current time after each 20 trials, while the clock was running at…

Subjective timepassagePosterior alphaFrontal thetaAdultMaleBoosting (machine learning)Computer scienceCognitive NeuroscienceClock rateElectroencephalography050105 experimental psychologylcsh:RC321-57103 medical and health sciencesYoung Adult0302 clinical medicineEncoding (memory)Task engagementsubjective timepassage ; posterior alpha ; frontal theta ; time perception ; CDA ; working memory ; task engagementmedicineHumans0501 psychology and cognitive sciencesEffects of sleep deprivation on cognitive performancelcsh:Neurosciences. Biological psychiatry. Neuropsychiatrymedicine.diagnostic_testWorking memory05 social sciencesWorking memoryBrainCognitionElectroencephalographyTime perceptionTheta oscillationsMemory Short-TermNeurologyCovertTime PerceptionFemale030217 neurology & neurosurgeryCognitive psychology
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Dissociable Effects of Reward on P300 and EEG Spectra Under Conditions of High vs. Low Vigilance During a Selective Visual Attention Task

2020

The influence of motivation on selective visual attention in states of high vs. low vigilance is poorly understood. To explore the possible differences in the influence of motivation on behavioral performance and neural activity in high and low vigilance levels, we conducted a prolonged 2 h 20 min flanker task and provided monetary rewards during the 20- to 40- and 100- to 120-min intervals of task performance. Both the behavioral and electrophysiological measures were modulated by prolonged task engagement. Moreover, the effect of reward was different in high vs. low vigilance states. The monetary reward increased accuracy and decreased the reaction time (RT) and number of omitted response…

medicine.medical_specialtymedia_common.quotation_subjectväsymysAudiology050105 experimental psychologyselective visual attentionlcsh:RC321-57103 medical and health sciencesBehavioral NeuroscienceNeural activity0302 clinical medicineevent-related potentialmotivationEvent-related potentialvigilanceevent-related spectral perturbationmedicineVisual attention0501 psychology and cognitive sciencesEEGtarkkaavaisuuslcsh:Neurosciences. Biological psychiatry. NeuropsychiatryBiological Psychiatrymedia_commonOriginal Researchmotivaatio05 social sciencesEeg spectraHuman NeuroscienceTask engagementP300 amplitudemental fatiguePsychiatry and Mental healthElectrophysiologyNeuropsychology and Physiological PsychologyNeurologyvireyskognitiivinen neurotiedePsychology030217 neurology & neurosurgeryVigilance (psychology)Frontiers in Human Neuroscience
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Sustaining Attention for a Prolonged Duration Affects Dynamic Organizations of Frequency-Specific Functional Connectivity

2020

Sustained attention encompasses a cascade of fundamental functions. The human ability to implement a sustained attention task is supported by brain networks that dynamically formed and dissolved through oscillatory synchronization. The decrement of vigilance induced by prolonged task engagement affects sustained attention. However, little is known about which stage or combinations are affected by vigilance decrement. Here, we applied an analysis framework composed of weighted phase lag index (wPLI) and tensor component analysis (TCA) to an EEG dataset collected during 80 min sustained attention task to examine the electrophysiological basis of such effect. We aimed to characterize the phase…

vigilance decrementmedia_common.quotation_subjecttensor component analysisWeighted phase lag indexElectroencephalographybehavioral disciplines and activitiesFrequency-specific dynamic functional connectivitySustaining attentionRewardmotivationmedicineHumansRadiology Nuclear Medicine and imagingAttentionWakefulnesstarkkaavaisuusmedia_commonmotivaatioOriginal PaperMotivationRadiological and Ultrasound Technologymedicine.diagnostic_testsignaalinkäsittelyFunctional connectivityBrainsignaalianalyysiTask engagementSustained attentionPhase lagElectrophysiological PhenomenaElectrophysiologysustained attentionNeurologyTensor component analysisSensorimotor networkVigilance decrementweighted phase lag indexfrequency-specific dynamic functional connectivityNeurology (clinical)kognitiivinen neurotiedeAnatomyPsychologyNeuroscienceVigilance (psychology)
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