The Joint Effect of Task Characteristics and Extraversion on The Performance, Workload, and Stress of Signal Detection

The present study tests an extension of the Dynamic Adaptability Theory of Stress (Hancock & Warm, 1989) that incorporated individual differences into the model (Szalma, 2008). The purpose was to investigate how the task characteristics of information rate (event rate) and information structure (number of displays to be monitored) interact with participant personality (extraversion) to affect the performance, workload, and stress associated with a cognitive vigilance task. As expected, extraversion moderated the relationship of task characteristics to performance, global workload, distress, and task engagement, although the relationship of extraversion to the worry dimensions of stress was not significant. Copyright 2012 by Human Factors and Ergonomics Society, Inc. All rights reserved

Haptic Perception

Recent years have seen a renewed interest in haptic perception fueled in part by the lack of fundamental knowledge that is necessary for the further development of haptic interfaces. In this chapter, a number of common methodologies for haptic psychophysical experiments are presented, such as discrimination and matching experiments and magnitude estimation. This is followed by a discussion of current research on the haptic perception of objects. In haptic object perception, shape, curvature, volume, weight, texture and material properties are important aspects that are considered. In this chapter, it will also be shown that the haptic perception of spatial relations is far from veridical, and that, like in vision, some haptic features "pop-out". Finally, some examples of how this research is being applied to technologies are discussed