Single Actor Sample Clauses
Single Actor. Alternating rate of prosocial token choice to chance. During the Single Actor sessions the prosocial token was chosen at a higher rate than expected by chance when rewards were equal (in- group: t11 = 1.832, P = 0.047; out-group: t11 = 2.086, P = 0.031) but not when rewards were unequal (in-group: t11 = 0.662, NS; out-group: t11 = 1.023, NS, Figure 7). 70 60 55 50 45 40 * * In-group Out-group In-group Out-group
Single Actor. Single Actor sessions were designed to test the level of prosociality individuals demonstrated without reciprocity involved. Procedure for these sessions was similar to that of de Waal et al (2008). One individual served as an actor for the entire session, the other as a passive partner. The actor was given 30 free-choice trials following the token exchange procedure described above. Prior to the commencement of this test, 6 forced-choice reminder trials (3 selfish and 3 prosocial) were given to help reinforce the values of the tokens. All Single Actor sessions were repeated on a second day to ensure that any learning effects had attenuated prior to moving on. Phase 4—Alternating. Alternating sessions consisted of 30 trials as described above. These sessions differed from Single Actor sessions in that from trial to trial the role of actor and partner switched between both subjects. In other words, the monkeys alternated choosing tokens. As individuals should had already learned the token values by this session, there were no reminder trials at the beginning of the session. Alternating sessions were repeated for a second day to allow the monkeys to learn about their partner’s behavior.
Single Actor. Yoked Control interactions (Pairing X Reward: F 1,11 = 0.002, NS; Pairing x Condition: F 1,11 = 0.912, NS; Reward x Condition: F 1,11 = 0.051, NS; Pairing x Reward x Condition: F 1,11 = 1.266, NS).