Suchergebnisse

The effects of different amounts of single- and dual-task practice were evaluated on the fourth, final training trial and with two transfer trials-a dual-task setting with the same tracking task that was used during practice and a dual-task setting with two different component tasks. Results showed that single-task practice contributed little to subsequent dual-task performance, but that the amount of dual-task practice was a major determinant of subsequent dual-task performance. In addition, the amount of dual-task practice resulted in positive transfer to the dual-task setting with the same tracking task in a linear fashion. A post hoc analysis revealed that the effects of practice on the transfer tasks were partially dependent upon the subject ability levels.

The post-1965 literature on the use of secondary tasks in the assessment of operator workload was surveyed. Twelve classes of tasks were identified; the most frequently used were choice reaction time, memory, monitoring, and tracking. The literature review did not suggest a single best task or class of tasks for the measurement of workload. Limitations in using secondary tasks are discussed, and directions for future research are presented.