The strong normative expectation that dictates we should help our elderly parents is a largely unrecognised evolutionary puzzle. Why do we invest so heavily in our parents when they are long past their reproductive years? Adult children looking after their own offspring often face a double burden of care, and choosing to help aging parents is often in conflict with the primary evolutionary task of parenthood - your own genetic posterity by ensuring your children become parents themselves. Despite the large altruism literature, no one has yet addressed this particular issue. This thesis investigates this theoretical paradox and adds to the sparse empirical work on kin and nonkin-directed altruism. As a test of the two most popular Inclusive Fitness evolutionary explanations of altruistic behaviours; Kin Selection (Hamilton, 1964) and Reciprocal Altruism (Trivers, 1971), this study takes a side-wise look at helping attitudes and behaviours across multiple types of relationships. A Choice Model experiment assessed 453 people from all Australian states stratified by age (145 16-24 year olds; 162 25-54 year olds, and 146 over 55 year olds). Participants responded to sixteen hypothetical situations where they could choose to help only one person from two persons requiring their help. The scenarios contained ten variables (relationship type; sex, type of help; history of reciprocation etc.) that were systematically varied. Data was analysed using Hierarchical Bayesian estimation methods, and after factoring out our general tendency toward a species wide cooperation, found broad support for Inclusive Fitness principles. Generally, there was a clear pattern of helping behaviour that saw friends as of at least equal importance to more distant relatives (cousins etc). Elderly parents are helped for no better reason than they are needy and this is an unequivocal demonstration of our species’ primary social imperative - cooperation - a clear inference that adult children are looking for the rewards that cooperation brings. This research also provides interesting insights into the nature of extended family dynamics as a sequelae of our rapid social evolution. / Doctor of Philosophy (PhD)
| Identifer | oai:union.ndltd.org:ADTP/181806 |
| Date | January 2004 |
| Creators | Faedda, Salvatora, University of Western Sydney, College of Arts, School of Psychology |
| Source Sets | Australiasian Digital Theses Program |
| Language | English |
| Detected Language | English |
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