Influence of display characteristics of EEG power on cognitive load

doi:10.16265/j.cnki.issn1003-3033.2020.02.029

Abstract

Abstract: In order to solve contradiction between "massive information and limited display" of human- computer interface in air and missile defense control cabin, influence of information display ratio, information delivery ratio and data update ratio on cognitive load of interface was explored through experiments. A comprehensive evaluation model of subjective and objective cognitive load was established with spectral power of EGG alpha wave and task load index (TLX) scale as indicators, and was used to evaluate cognitive load. The results show that these three factors have a significant impact on cognitive load in an order of information display ratio, information delivery ratio, and data update ratio decreasingly according to their influence degree. The combination that that minimizes cognitive load is formed with aninformation display ratio of 80 bits, an information delivery ratio of 4 bits, and an data update ratio of 3 s.

Key words: information display, cognitive load, electroencephalogram (EEG), human computer interface, Alpha wave spectrum power

CLC Number:

X944.4

CHEN Long, WANG Wei, QU Jue, HU Bo, CAI Rui, ZHAO Minrui. Influence of display characteristics of EEG power on cognitive load[J]. China Safety Science Journal, 2020, 30(2): 183-189.

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