@article{ref1,
title="The role of effort in the performance of a distance discrimination",
journal="Journal of experimental psychology",
year="1949",
author="Solomon, Richard L.",
volume="39",
number="1",
pages="73-83",
abstract="&quot;An experiment involving a distance discrimination in white rats has been performed in order to demonstrate the role of effort in the performance of a task which is probably controlled peripherally by response-produced cues. It was found that rats, trained to a stable level of discrimination performance, shifted their distance discrimination responses when the work requirement was increased. The shift was in the direction of 'underestimating' the distance to be traversed; that is, the laden animals turned earlier than they did with no load. The theoretical implications of these results have been discussed, and the advantages of peripheral constructs have been emphasized.&quot; (PsycINFO Database Record (c) 2012 APA, all rights reserved)<p />",
language="",
issn="0022-1015",
doi="10.1037/h0056048",
url="http://dx.doi.org/10.1037/h0056048"
}