Abstract:
OBJECTIVE:The aim of this study was to distill and define those influences under which change in objective performance level and the linked cognitive workload reflections of subjective experience and physiological variation either associate, dissociate, or are insensitive, one to another. BACKGROUND:Human factors/ergonomics frequently employs users' self-reports of their own conscious experience, as well as their physiological reactivity, to augment the understanding of changing performance capacity. Under some circumstances, these latter workload responses are the only available assessment information to hand. How such perceptions and physiological responses match, fail to match, or are insensitive to the change in primary-task performance can prove critical to operational success. The reasons underlying these associations, dissociations, and insensitivities are central to the success of future effective human-machine interaction. METHOD:Using extant research on the relations between differing methods of workload assessment, factors influencing their association, dissociation, and insensitivity are identified. RESULTS:Dissociations and insensitivities occur more frequently than extant explanatory theories imply. Methodological and conceptual reasons for these patterns of incongruity are identified and evaluated. APPLICATION:We often seek convergence of results in order to provide coherent explanations as bases for future prediction and practical design implementation. Identifying and understanding the causes as to why different reflections of workload diverge can help practitioners toward operational success.
journal_name
Hum Factorsjournal_title
Human factorsauthors
Hancock PA,Matthews Gdoi
10.1177/0018720818809590subject
Has Abstractpub_date
2019-05-01 00:00:00pages
374-392issue
3eissn
0018-7208issn
1547-8181journal_volume
61pub_type
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