@article{ref1,
title="Stimulus categorization and response time",
journal="Perceptual and motor skills",
year="1964",
author="Nickerson, R. S. and Feehrer, C. E.",
volume="18",
number="3",
pages="785-793",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0031-5125",
doi="10.2466/pms.1964.18.3.785",
url="http://dx.doi.org/10.2466/pms.1964.18.3.785"
}