Figure 3.

Effect of the cooperative task on the relationship quality between kin, friend, and non-friend partners. (a) Results from the Yes/No preference scale in which children were asked to answer the following question, before and after the rope-pulling task: ‘Do you like to play with CHILD X?’. ‘Yes’ responses appear in light grey and ‘No’ responses in dark grey. (b) Responses from the Emoticon Likert scale during which children were asked to rate how much they like to play with their partner twice (before and after the rope-pulling task). They can either respond ‘a lot’ in light grey, ‘a little’ in medium grey, or ‘not at all’ in dark grey while pointing to a ‘smiley scale’ corresponding to each level. Perceived relationship quality of non-friends improved after cooperating.