科研之友
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摘要
The effects of intermittent and variable time delay were investigated to understand the cognitive and physical consequences of gaps between an input from an operator and the corresponding feedback response from the system. Time delay has been shown to disrupt task performance in various areas including psychology and telerobotics. Previous research in multiple domains has focused on the performance effects of time delay and overcoming technological limitations that cause time delay. However, robotics researchers have yet to study the effects of variable time delay on specific operator emotions, usability, and physiological activation in teleoperations. This study investigates the influence of variable time delay not only on task performance, but also operator emotions, physiological arousal, cognitive workload, and usability in teleoperation. Time delay was manipulated by introducing lag into the system feedback. Participants were asked to navigate a remote-control robot vehicle through mazes of differing levels of task complexity in a remote location and simultaneously identify targets. Results showed that operator frustration, anger, and workload increased while usability and task performance decreased when intermittent and variable feedback lag was introduced to a robotic navigation task. The effect of the variable time delay was greater than the effect of task complexity. Furthermore, results suggest that the effects are of time delay and task complexity are additive. A better understanding of the emotional experiences of human operators and the corresponding physiological signals is of crucial importance to designing affect-aware robotic systems that have the ability to appropriately mitigate negative operator emotional states.
- 出版日期2017-9
