Bliss J P, Dunn M C
Psychology Department, University of Alabama at Huntsville, 35899, USA.
Ergonomics. 2000 Sep;43(9):1283-300. doi: 10.1080/001401300421743.
The research was conducted to investigate the effect of increasing primary task and alarm workload on alarm mistrust as reflected by alarm and primary task performances. A total of 126 undergraduate students performed a complex psychomotor task battery three times, with the number of concurrent tasks increasing each time. During their performance, the students were required to react to an alarm system (including visual and auditory components) of questionable reliability. Depending on the group to which participants were assigned, the alarm presentation rate constituted a low-, medium- or high-workload condition. Alarm response data (times, frequencies, accuracies) and primary task data (tracking error) were analyzed to assess performance differences as a function of primary and secondary task workload levels. Results generally supported the hypotheses: increasing primary task and alarm task workload degraded alarm response performance. Also, response frequencies supported earlier research suggesting that participants 'probability match' their response rates to alarm system reliability. The results are discussed with regard to the cry-wolf effect, attention theory and alarm system design.
本研究旨在通过警报和主要任务表现来调查增加主要任务和警报工作量对警报不信任的影响。共有126名本科生进行了三次复杂的心理运动任务组，每次并发任务的数量都在增加。在他们执行任务期间，要求学生对可靠性存疑的警报系统（包括视觉和听觉组件）做出反应。根据参与者被分配的组，警报呈现率构成低、中或高工作量条件。分析警报响应数据（时间、频率、准确性）和主要任务数据（跟踪误差），以评估作为主要和次要任务工作量水平函数的性能差异。结果总体上支持了假设：增加主要任务和警报任务工作量会降低警报响应性能。此外，响应频率支持了早期的研究，表明参与者将他们的响应率“概率匹配”到警报系统的可靠性。针对“狼来了”效应、注意力理论和警报系统设计对结果进行了讨论。
