@article{ref1,
title="Interaction of task difficulty, activation, and work load",
journal="Journal of human stress",
year="1977",
author="Sjöberg, H.",
volume="3",
number="1",
pages="33-38",
abstract="The performance of 25 subjects in three reaction tasks of different complexity was compared at different activation levels induced by five different work loads on a bicycle ergometer. Heart rate and blood pressure were used as indexes of activation. The results were in agreement with the Yerkes-Dodson law in that the optimal physiological activation level for rapid performance varied with the degree of task difficulty, relatively lower activation being more favorable the more difficult the task.<p /><p>Language: en</p>",
language="en",
issn="0097-840X",
doi="10.1080/0097840X.1977.9936080",
url="http://dx.doi.org/10.1080/0097840X.1977.9936080"
}