@article{ref1,
title="Measurement of Workload by Secondary Tasks",
journal="Human factors",
year="1979",
author="Levine, Jerrold M. and Ogden, George D. and Eisner, Ellen J.",
volume="21",
number="5",
pages="529-548",
abstract="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. Keywords: Driver distraction;<p /><p /><p>Language: en</p>",
language="en",
issn="0018-7208",
doi="10.1177/001872087902100502",
url="http://dx.doi.org/10.1177/001872087902100502"
}