Fig. 1

a Number of pinnings received during 10-min rat RT play and b Asymmetry score of paired rats in control and socially reduced groups. In b, high asymmetry score indicates the rat received fewer pinnings than delivered pinnings. In both figures, bars show the group median and the 1st and the 3rd quartile. Upper and lower whiskers extend from the bars to the largest/smallest value no further than 1.5 times of the distance between the first and third quartiles. The * sign indicates significant difference.