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Breaking - scent trials
http://www.niu.edu/user/tj0dgw1/mypdf/wallace%20gorny%20whishaw%202002.pdf
Means LW, Alexander SR, O'Neal MF.
Department of Psychology, East Carolina University, Greenville,
North
Carolina 27858.
Three-month-old Sprague-Dawley rats were trained on a working memory
win-stay (spatial delayed matching-to-sample) water-escape task with
the
escape platform location the same for all subjects on a given trial,
a
procedure that maximizes the buildup of an odor trail to the escape
platform. In subsequent tests during which the location of the
escape
platform varied randomly between subjects, the rats, especially the
females, while continuing to perform above chance level, made
increased
errors. Varying the platform location between subjects eliminated
odor
trail as a non-ambiguous cue for locating the escape platform. In a
second experiment females performed better than males on a reference
memory odor trail discrimination task which involved following the
path
of like-gender "pathmaker" rats to the escape platform. The
relatively
poor use of odor trails by the males
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