Neural Correlates of Workload Transition in Multitasking: An ACT-R Model of Hysteresis Effect

Frontiers in Human Neuroscience
Na Young KimChang S Nam

Abstract

This study investigated the effect of task demand transitions at multiple levels of analysis including behavioral performance, subjective rating, and brain effective connectivity, while comparing human data to Adaptive Control of Thought-Rational (ACT-R) simulated data. Three stages of task demand were designed and performed sequentially (Low-High-Low) during AF-MATB tasks, and the differences in neural connectivity during workload transition were identified. The NASA Task Load Index (NASA-TLX) and the Instantaneous Self-Assessment (ISA) were used to measure the subjective mental workload that accompanies the hysteresis effect in the task demand transitions. The results found significant hysteresis effects on performance and various brain network measures such as outflow of the prefrontal cortex and connectivity magnitude. These findings would assist in clarifying the direction and strength of the Granger Causality under demand transitions. As a result, these findings involving the neural mechanisms of hysteresis effects in multitasking environments may be utilized in applications of neuroergonomics research. The ability to compare data derived from human participants to data gathered by the ACT-R model allows researchers to be...Continue Reading

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Citations

Jul 17, 2020·IISE Transactions on Occupational Ergonomics and Human Factors·Shannon Patricia DevlinSara Lu Riggs

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Methods Mentioned

BETA
ISA

Software Mentioned

JS
Adaptive Control of Thought - Rational ( ACT - R
Source Information Flow Toolbox ( SIFT )
SIMCog
SIFT
BCI2000
AF
R
JS ( Simplified Interfacing for Modeling Cognition – JavaScript
MATB

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