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Effects of working ...
Effects of working memory load and repeated scenario exposure on emergency braking performance
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- Engström, Johan A Skifs, 1973 (författare)
- Volvo Group
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- Ljung Aust, Mikael, 1973 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Viström, Matias, 1979 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2010-09-08
- 2010
- Engelska.
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Ingår i: Human Factors. - : SAGE Publications. - 1547-8181 .- 0018-7208. ; 52:5, s. 551-559
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Abstract
Ämnesord
Stäng
- Objective: The objective of the present study was to examine the effect of working memory load on drivers' responses to a suddenly braking lead vehicle and whether this effect (if any) is moderated by repeated scenario exposure. Background: Several experimental studies have found delayed braking responses to lead vehicle braking events during concurrent performance of nonvisual, working memory-loading tasks, such as hands-free phone conversation. However, the common use of repeated, and hence somewhat expected, braking events may undermine the generalizability of these results to naturalistic, unexpected, emergency braking scenarios. Method: A critical lead vehicle braking scenario was implemented in a fixed-based simulator. The effects of working memory load and repeated scenario exposure on braking performance were examined. Results: Brake response time was decomposed into accelerator pedal release time and accelerator-to-brake pedal movement time. Accelerator pedal release times were strongly reduced with repeated scenario exposure and were delayed by working memory load with a small but significant amount (178 ms). The two factors did not interact. There were no effects on accelerator-to-brake pedal movement time. Conclusion:The results suggest that effects of working memory load on response performance obtained from repeated critical lead vehicle braking scenarios may be validly generalized to real world unexpected events. Application: The results have important implications for the interpretation of braking performance in experimental settings, in particular in the context of safety-related evaluation of in-vehicle information and communication technologies. © 2010, Human Factors and Ergonomics Society.
Ämnesord
- SAMHÄLLSVETENSKAP -- Annan samhällsvetenskap -- Övrig annan samhällsvetenskap (hsv//swe)
- SOCIAL SCIENCES -- Other Social Sciences -- Other Social Sciences not elsewhere specified (hsv//eng)
Nyckelord
- attentional processes
- dual-task performance
- brake response time
- repeated scenario exposure
- working memory load
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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