POCs and performance decrements - A reply to Kantowitz and Weldon
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Wickens, C. D.↗
Engineering topics
Yeh, Y.-Y.
Publications and source records attributed to Yeh, Y.-Y..
The effect of varying task difficulty on subjective workload
The effect of different difficulty distribution patterns on subjective workload, and the presence of a primacy/recency effect in subjective ratings are examined. Eight subjects performed the perceptual central processing required for response selection and manual target acquisition for response execution. The reaction time, movement time, and the percent of correct pattern matching and arithmetic equations are analyzed. The data reveal that subjective rating is unaffected by different task difficulty and no primacy/recency effects are observed in subjective ratings. It is concluded that subjective workload reflects the experience of an ongoing integration process.
Yeh, Y.-Y.↗
A comparison of operator performance in manual and automated versions of a dynamic decision-making task
The study of operator performance in manual and automated versions of dynamic decision tasks is proposed. The two microcomputer paradigms of simple and complex, dynamic scheduling tasks are described. Error detection accuracy and latency of assignment, and fault detection and correction for the two tasks are to be analyzed.
Wickens, C. D.↗
Why do performance and subjective workload measures dissociate?
A set of three experiments are described that examine the sources of information processing that produce a dissociation between subjective workload measures and performance. The results support a theory of the dissociation. Subjective measures are driven more by the number of tasks currently performed. Subjective measures are also less sensitive to resource competition than performance measures are. Factors that demand more resource investment improve performance, but these factors also increase subjective ratings of workload.
Yeh, Y.-Y.↗
The dissociation between subjective workload and performance A multiple resource approach
A theory of the dissociation between subjective measures of mental workload and performance is described. The theory proposes that subjective measures are heavily driven by the number of tasks or task elements that a subject must perform concurrently. However they are relatively less sensitive to whether these tasks compete for common or separate resources, and to the difficulty of a single task, particularly if this difficulty is related to response factors. Performance, on the other hand, is particularly influenced by single task difficulty of both a perceptual and response nature and by resource competition between tasks. A set of three experiments are described to examine the dissociation between subjective difficulty measures and performance. These experiments employ different combinations of three tasks: tracking, memory search, and a simulated air traffic control problem. The results supported all forms of dissociation predicted by the theory and the implications of results to workload measurement are discussed.
Wickens, C. D.↗