University of Tasmania
Browse

Real-time prediction of short-timescale fluctuations in cognitive workload

Download (6.72 MB)
journal contribution
posted on 2023-05-21, 01:49 authored by Boehm, U, Matzke, D, Matthew GrettonMatthew Gretton, Castro, S, Cooper, J, Skinner, M, Strayer, D, Heathcote, A
Human operators often experience large fuctuations in cognitive workload over seconds timescales that can lead to sub-optimal performance, ranging from overload to neglect. Adaptive automation could potentially address this issue, but to do so it needs to be aware of real-time changes in operators’ spare cognitive capacity, so it can provide help in times of peak demand and take advantage of troughs to elicit operator engagement. However, it is unclear whether rapid changes in task demands are refected in similarly rapid fuctuations in spare capacity, and if so what aspects of responses to those demands are predictive of the current level of spare capacity. We used the ISO standard detection response task (DRT) to measure cognitive workload approximately every 4 s in a demanding task requiring monitoring and refueling of a feet of simulated unmanned aerial vehicles (UAVs). We showed that the DRT provided a valid measure that can detect diferences in workload due to changes in the number of UAVs. We used cross-validation to assess whether measures related to task performance immediately preceding the DRT could predict detection performance as a proxy for cognitive workload. Although the simple occurrence of task events had weak predictive ability, composite measures that tapped operators’ situational awareness with respect to fuel levels were much more efective. We conclude that cognitive workload does vary rapidly as a function of recent task events, and that real-time predictive models of operators’ cognitive workload provide a potential avenue for automation to adapt without an ongoing need for intrusive workload measurements.

History

Publication title

Cognitive Research

Volume

6

Pagination

1-29

ISSN

2365-7464

Department/School

School of Psychological Sciences

Publisher

Springer

Place of publication

United Kingdom

Rights statement

© The Author(s) 2021. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons Attribution 4.0 International (CC BY 4.0) licence, (https://creativecommons.org/licenses/by/4.0/) and indicate if changes were made

Repository Status

  • Open

Socio-economic Objectives

Expanding knowledge in psychology

Usage metrics

    University Of Tasmania

    Categories

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC