Anticipated vs. experienced workload: How accurately can people predict task demand?

M. Sublette, C. M. Carswell, R. Grant, M. Klein, W. B. Seales, D. Clarke

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

5 Scopus citations

Abstract

The NASA-TLX subjective workload assessment is typically used immediately following a participant's performance in an experimental task to assess the workload experienced. However, it is sometimes necessary to assess the anticipated workload of a task before the task is actually performed. This study compares the workload assessments of participants who performed two minimally invasive surgical training tasks to participants who only saw descriptions of the two tasks. Results showed that participants who were asked to rate the anticipated workload underestimated the overall workload required for the "cannulation" task, while overestimating the overall workload required for the rope task. Interactions between task type and condition also were found in three of the NASA-TLX subscales (mental demand, effort, and frustration). Overall, the reliability of participants' prediction of the difficulty depended on the task being evaluated and the particular measure of difficulty that was being assessed. In general, physical facets of workload appeared to be more accurately assessed than cognitive facets.

Original languageEnglish
Title of host publication53rd Human Factors and Ergonomics Society Annual Meeting 2009, HFES 2009
PublisherHuman Factors an Ergonomics Society Inc.
Pages1383-1387
Number of pages5
ISBN (Print)9781615676231
DOIs
StatePublished - 2009
Event53rd Human Factors and Ergonomics Society Annual Meeting 2009, HFES 2009 - San Antonio, TX, United States
Duration: Oct 19 2009Oct 23 2009

Publication series

NameProceedings of the Human Factors and Ergonomics Society
Volume3
ISSN (Print)1071-1813

Conference

Conference53rd Human Factors and Ergonomics Society Annual Meeting 2009, HFES 2009
Country/TerritoryUnited States
CitySan Antonio, TX
Period10/19/0910/23/09

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