Lateral bias in capuchin monkeys (Cebus apella): concordance between parents and offspring.

We examined lateral bias for looking, reaching, and turning in 33 tufted capuchin monkeys (Cebus apella) comprising 29 parent-offspring dyads (13 mother-offspring dyads and 16 father-offspring dyads). We found evidence for maternal and paternal contributions to the direction of looking bias but no evidence for contribution from either parent to the direction of reaching bias. Further, we found evidence of differential maternal and paternal influences on the direction of offspring turning bias. Finally, we found no evidence of parental contribution to the strength of lateral bias for any of our measures. Our results indicate that parental contributions to lateral bias in humans and apes may not correspond to those in monkeys.