Performance and Workload Trends: The Effects of Repeated Exposure to “High” Demand Tasks

The N-back and Surrogate Reference Task (SuRT) are frequently used to evaluate the workload potential of secondary driving tasks as high cognitive and visual demand benchmarks. This paper examines the effect of repeated exposures to the N-back and SuRT reference tasks, and any resulting change in task performance or workload that may negate their effectiveness as calibration tools and high workload benchmarks. One-way repeated measures ANOVA analyses demonstrate that N-back performance improves while workload decreases, suggesting limitations in methodology for measuring task workload after multiple exposures. Alternatively, SuRT performance improves while workload remains relatively stable, indicating the task elicits a constant visual demand despite performance improvements. This paper discusses the limitations of the N-back and SuRT as reference tasks in workload and driving research, and proposes future directions to further clarify their use.

[1]  Christopher D. Wickens,et al.  The Structure of Attentional Resources , 1980 .

[2]  Mark Vollrath,et al.  Learning the Lane Change Task: comparing different training regimes in semi-paced and continuous secondary tasks. , 2012, Applied ergonomics.

[3]  David L. Strayer,et al.  Visual and Cognitive Demands of Using In-Vehicle Infotainment Systems , 2017 .

[4]  Bryan Reimer,et al.  Classifying driver workload using physiological and driving performance data: two field studies , 2014, CHI.

[5]  Stefan Mattes,et al.  Surrogate Distraction Measurement Techniques: The Lane Change Test , 2009 .

[6]  Camille L. Wheatley,et al.  Visual and Cognitive Demands of Using Apple CarPlay, Google’s Android Auto and Five Different OEM Infotainment Systems , 2018 .

[7]  Tibor Petzoldt,et al.  Learning effects in the lane change task (LCT)--realistic secondary tasks and transfer of learning. , 2014, Applied ergonomics.

[8]  David L. Strayer,et al.  Assessing Cognitive Distraction in the Automobile , 2015, Hum. Factors.

[9]  Joel Myerson,et al.  Dual n-back training increases the capacity of the focus of attention , 2013, Psychonomic bulletin & review.

[10]  Tony Wynn,et al.  Comparison of subjective workload ratings and performance measures of a reference IVIS task , 2008 .

[11]  S. Hart,et al.  Development of NASA-TLX (Task Load Index): Results of Empirical and Theoretical Research , 1988 .

[12]  Lawrence R. Zeitlin,et al.  Estimates of Driver Mental Workload: A Long-Term Field Trial of Two Subsidiary Tasks , 1995, Hum. Factors.

[13]  Allen and Rosenbloom Paul S. Newell,et al.  Mechanisms of Skill Acquisition and the Law of Practice , 1993 .