Figure 2.

Results from the valence comparison testing paradigm. (A) The mean number of food rewards and social rewards for the group-housed B6 and BTBR mice across the last 10 sessions of the valence comparison paradigm. There were significantly more food rewards obtained than social rewards for both mouse groups. However, the BTBR mice obtained significantly fewer food rewards than the B6 mice and also the fewest number of social rewards (data not significant). (B) There were no significant differences in the percentage of social rewards between the mouse groups. (C) The percentage of social rewards significantly increased in the B6 mice. However, for the BTBR mice, there was no difference in the percentage of social rewards across testing. (D) Paired sample t-tests showed food lever presses (regardless of whether it was assigned to the left or right lever) to be significantly faster, and thus more efficient than social lever presses in the B6 mice but not the BTBR mice.