@article{ref1,
title="Response times for "same"-"different" judgments",
journal="Perceptual and motor skills",
year="1965",
author="Nickerson, Raymond S.",
volume="20",
number="1",
pages="15-18",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0031-5125",
doi="10.2466/pms.1965.20.1.15",
url="http://dx.doi.org/10.2466/pms.1965.20.1.15"
}