Figure 6.

Detailed analysis of the behavior of control and NR1-KO mice in the multiple strategies learning task. A, Each animal had to learn to turn left at the first intersection (I), right at the second (II), and left at the third (III). The percentage of left turns performed by either mutant or control mice are calculated for each of the three intersections leading to the goal (I, II, III). B–D, The percentage of left turns at the first (I), the second (II), and the third intersections (III), respectively. A learned behavior led to an increase of left turns at the first and the third intersections and a decrease at the second one. Chance level corresponds to 50% of left turns. Notice that mutant mice remained at chance level at the second and the third intersections.