@article{ref1,
title="Task predictability in the organization, acquisition, and retention of tracking skill",
journal="Journal of experimental psychology",
year="1965",
author="Trumbo, D. and Noble, M. and Cross, K. and Ulrich, L.",
volume="70",
number="",
pages="252-263",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0022-1015",
doi="",
url="http://dx.doi.org/"
}