Fig. 7

Relative playfulness is dynamic within pairs. Each column indicates a single individual from a same-sex pair set. Age is indicated in the far left column. PN33, on which a novel play partner was introduced, was excluded. For each pair, the individual displaying the higher frequency is indicated in a darker shade for either total play (cumulative pouncing, pinning, boxing and chasing), and two individual play components, pouncing and pinning. The individual displaying the lower frequency of each component is indicated in a lighter shade. Instances in which frequencies of both individuals were the same are shown in gray and the actual number of events is included in each cell