@article{ref1,
title="Predicting learning, attitude shift, and skill improvement from a traffic safety film",
journal="Educational technology research and development",
year="1960",
author="Merrill, Irving and McAshan, Hildreth",
volume="8",
number="5",
pages="263-274",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="1042-1629",
doi="10.1007/BF02713459",
url="http://dx.doi.org/10.1007/BF02713459"
}