Effects of task difficulty and time‐on‐task on mental workload

Shigeru Haga · Haruo Shinoda · Mitsuteru Kokubun

50 citations0/0 files storedJapanese Psychological Research

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Human-Automation Interaction and Safety Neural and Behavioral Psychology Studies Sleep and Work-Related Fatigue

Abstract

Abstract: Twelve subjects performed a tracking task and a memory search task simultaneously on a computer screen. The dual task continued for approximately 10 min and was repeated three times, interrupted by a short break for subjective ratings: the NASA Task Load Index (NASA‐TLX) and the Check List of Mental Condition. Event related potentials (ERP) evoked by the presentation of memory task stimuli were also recorded. All the subjects participated in three experimental sessions, which varied in difficulty of tracking task. Results demonstrated that the NASA‐TLX and ERP were sensitive only to the change in task difficulty and were not affected by time‐on‐task or interaction between task difficulty and time‐on‐task.

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1988Development of NASA-TLX (Task Load Index): Results of Empirical and Theoretical Research 2015Engineering Psychology and Human Performance 1992Engineering psychology and human performance, 2nd ed.1961MEASURING THE SPARE ‘MENTAL CAPACITY ’OF CAR DRIVERS BY A SUBSIDIARY TASK 1996Japanese version of NASA Task Load Index: Sensitivity of its workload score to difficulty of three different laboratory tasks.1993Subjective mental workload assessment technique-An introduction to NASA-TLX and SWAT and a proposal of simple scoring methods.1988Properties of Workload Assessment Techniques 1988Measuring Mental Workload: Problems, Progress, and Promises

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