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. Author manuscript; available in PMC: 2009 Dec 22.
Published in final edited form as: Behav Brain Res. 2008 Sep 18;195(2):260–270. doi: 10.1016/j.bbr.2008.09.009

Figure 5.

Figure 5

Mean (±1 SEM) elevation scores (A) and duration scores (B) from the discrimination training phase for rats in Experiment 3B. Mean (±1 SEM) elevation and duration scores from the novel CS (C) and ambiguous CS (D) test sessions. Initial tests with the novel CS indicated some orienting to the stimulus (negative elevation and duration scores, filled bars in C). After the test rats were injected with saline 15 min before 8 daily ‘ambiguous’ training sessions; the novel CS was presented 8 times during each session. On 4 of these sessions, this CS was immediately followed by 4-s access to sucrose; on the remaining sessions, the CS was followed by a 4-s empty interval. Subsequent tests (D) were conducted to examine whether the original training drug facilitated responding to this ‘ambiguous’ CS.