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. 2003 Sep;10(5):326–336. doi: 10.1101/lm.62903

Figure 1.

Figure 1

Mean (± SEM) errors for three groups of rats trained in the working-memory (WM) or reference-memory (RM) versions of the radial-arm water maze (RAWM). The WM-Cat (exposure) and RM-Cat (exposure) groups spent the 30-min delay period between the acquisition (T1–T4) and retention (RT–T8) phases in a chamber with a cat and the WM-HC (HC; home cage exposure) group spent the 30-min delay period in their home cages. Here and in Figures 2, 3, 4, RT refers to retention trial, emphasizing that at the end of the delay period, the RT measured a rat's retention of the memory for the platform location. The three groups all had a mean of 12 days of training before they were given either the control (home cage) or stress (cat exposure) manipulation. The * indicates that on the RT and T6, the WM-Cat group was significantly different from both the RM-Cat and WM-HC groups, and the β indicates that on T7, the WM-Cat group was significantly different from the RM-Cat group.