Comparative lower-order hierarchical personality structure and personality development in nonhuman great apes
Item statusRestricted Access
Embargo end date26/06/2021
Smith, Conor Gregory
The aim of this thesis is to identify the structure of personality below the factor level in chimpanzees, bonobos, orangutans, gorillas in terms of both facets and items and to investigate the development of these lower-order traits over the lifespan in these species. First, we aim to summarise the ﬁeld of personality development in nonhuman animals at the factor level and exploring potential pathways and mechanisms that can explain how these diﬀerent personality structures evolved in a wide variety of species. Next, we identify the facet structure of personality traits in four great apes using data-driven analytic methods and compare this structure amongst species. Third, we go beyond facets to the ﬁner hierarchical level of nuances or items and explore how the greater detail available from using these levels of personality improve our understanding of how personality varies with age in the same four species. Finally, we lay out a method for the adaptation of these personality questionnaire instruments to identify personality structure in a new primate family, lemurs. These lower-order structures have great potential to increase understanding of personality in nonhuman animals and this thesis provides a solid foundation for wider adoption of these ideas.
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