منابع مشابه
Testing evolutionary theories of menopause.
Why do women cease fertility rather abruptly through menopause at an age well before generalized senescence renders child rearing biologically impossible? The two main evolutionary hypotheses are that menopause serves either (i) to protect mothers from rising age-specific maternal mortality risks, thereby protecting their highly dependent younger children from death if the mother dies or (ii) t...
متن کاملTesting Evolutionary Theories of Discriminative Grandparental Investment
This study tests two evolutionary hypotheses on grandparental investments differentiated by the child's sex: the paternity uncertainty hypothesis and the Trivers-Willard hypothesis. Data are from two culturally different countries: the Dutch Longitudinal Aging Study Amsterdam (n=2375) and the Chinese Anhui Survey (n=4026). In the Netherlands, grandparental investments are biased towards daughte...
متن کاملTesting evolutionary theories of aging in wild populations.
Classic theories for the evolution of senescence predict that rates of aging should be highest in populations in which extrinsic mortality is high. This predication is called into question in new work by David Reznick and co-workers, who found that guppies Poecilia reticulata derived from natural populations with high levels of predation live the longest in the laboratory. This study illustrate...
متن کاملEvolutionary Theories
A year before his death, Kurt Lewin taught a graduate course at MIT on theories in social psychology. Stanley Schacter, a student enrolled in the course, described it as “more philosophy of science than a review of different theories. Its purpose was to teach students what a theory is, how to test a theory appropriately, and what makes a theory useful” (Higgins, 2004, p. 138). In this light, Le...
متن کاملTesting Theories of Happiness
Happiness research in economics takes reported subjective well-being as a proxy measure for utility and has already provided many interesting insights about human well-being and its determinants. We argue that future research on happiness in economics has a lot of potential, but that it needs to be guided more by theory. We propose two ways to test theories of happiness, and illustrate them wit...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Proceedings of the Royal Society B: Biological Sciences
سال: 2007
ISSN: 0962-8452,1471-2954
DOI: 10.1098/rspb.2007.1028