Figure 5.

Number of sessions required for mice to learn the VD and reversal tasks. Overall BALB/c mice acquired VD and reversal in significantly fewer sessions than the C57BL/6 mice. (A) When VD was analyzed for image type C57BL/6 (but not BALB/c) mice learnt faster when responding to the four small circles compared to the single large circle. (B) Then on reversal, switching from the single large circle to the four small circles was acquired faster by both strains than the opposite switch from the four small circles to the single large circle (white bars are BALB/c, shaded bars are C57BL/6, open bars are mice originally trained on large circle, hatched bars are mice originally trained on four small circles), *p < 0.05.