Oriental pied hornbills ( < em > Anthracoceros albirostris < /em > ) solve invisible displacement tasks in a test of Piagetian object permanence

In this study, six Oriental pied hornbills underwent testing for object permanence, including a series of seven standard Piagetian tasks involving visible and invisible displacements. The subjects consistently demonstrated spontaneous object permanence in all stages leading up to the invisible displacement stage. Half of the subjects achieved full stage 6 double invisible displacement Piagetian object permanence, while the other half reached stage 5 double visible displacement. Breeding behaviour and the duration of developmental stages are proposed as potential factors influencing object permanence ability in this species of hornbill.PMID:38290552 | PMC:PMC10827421 | DOI:10.1098/rsbl.2023.0547
Source: Biology Letters - Category: Biology Authors: Source Type: research