@article{ref1,
title="A random-walk interpretation of incentive effects in visual discrimination",
journal="Behavioural processes",
year="2010",
author="Blough, Donald S.",
volume="85",
number="3",
pages="209-214",
abstract="Previous studies have shown that changes in stimulus discriminability and changes in reward density affect pigeon reaction-time (RT) distributions in different ways (Blough, 2004). A random-walk model (&quot;RWP&quot;) accounts for these differences and assigns a single parameter to each of the independent variables. This paper briefly reviews the model and illustrates its findings with hue discrimination data. A new analysis then presents fits to data showing that increased reward for stimulus &quot;A&quot; lengthens RT of pecks to an alternative stimulus &quot;B&quot;, and that this effect on RT distributions is much the same as the effect caused by reduction of reward to B. RWP account for both effects by changes in its &quot;bias&quot; parameter. The remainder of the paper comments on the relations between reward, RT, incentive and bias.<p /> <p>Language: en</p>",
language="en",
issn="0376-6357",
doi="10.1016/j.beproc.2010.07.013",
url="http://dx.doi.org/10.1016/j.beproc.2010.07.013"
}