Table S1.

Number of sessions and mean number of trials completed

ActorPartner
M1M2M3M4
Long-tailed monkeys
 M112 sessions, 654 ± 4 trials/offer10 sessions, 327 ± 13 trials/offer11 sessions, 454 ± 23 trials/offer
 M225 sessions, 806 ± 22 trials/offer14 sessions, 626 ± 32 trials/offer29 sessions, 1,019 ± 12 trials/offer
 M314 sessions, 606 ± 10 trials/offer13 sessions, 286 ± 20 trials/offer16 sessions, 534 ± 20 trials/offer
 M44 sessions, 100 ± 5 trials/offer7 sessions, 267 ± 19 trials/offer6 sessions, 238 ± 12 trials/offer
Rhesus monkeysM6M7
 M531 sessions, 1,567 ± 19 trials/offer2 sessions, 201 ± 5 trials/offer
  • Trials per offer represent the mean number of trials performed for each of the four choice offers (two nonsocial and two social). Text color indicates the social tendency of the actor in front of each partner: green = benevolent, blue = indifferent, red = malevolent, and black = mixed. —, no data.