Cues of kinship will increase prosocial behaviour. Cues of kinship will be manipulated by morphed facial self-resemblance. Prosocial behaviour will be measured by responses in the trust game. The prediction is that the number of trusting AND/OR reciprocating moves will be greater to self morphs than to other morphs.
trust_lowboundis confirmed if analysis
trust_highboundis confirmed if analysis
recip_lowboundis confirmed if analysis
recip_highboundis confirmed if analysis
The hypothesis is corroborated if the 97.5% CI lower bound is greater than 0 and the 97.5% CI upper bound is greater than 0.2 (the SESOI) for either the trust or reciprocation moves.
(trust_lowbound & trust_highbound) | (recip_lowbound & recip_highbound)
The hypothesis is falsified if the 97.5% CI upper bound is smaller than 0.2 (the SESOI) for both trust and reciprocation.
!trust_highbound & !recip_highbound
All other patterns of results are inconclusive.
t.test(kin$trust_self, kin$trust_other, paired = TRUE, conf.level = 0.975)
t.test(kin$recip_self, kin$recip_other, paired = TRUE, conf.level = 0.975)