Adaptive sex ratio variation in pre–industrial human ( Homo sapiens ) populations?

Homo Sapiens

Homo Socialis and Homo Sapiens

The assumption that individuals are behaving rationally can, at times, usefully constrain predictions of individual and collective behavior. However, success in predicting human and group behavior will often require relaxing this assumption of rationality, instead employing evolutionary, neural, and cognitive constraints. One particularly important form of neural and cognitive constraint is tha...

Visualizing patterns of craniofacial shape variation in Homo sapiens.

The geometric morphometric analysis of shape variation in complex biological structures such as the human skull poses a number of specific challenges: the registration of homologous morphologies, the treatment of bilateral symmetry, the graphical representation of form variability in three dimensions and the interpretation of the results in terms of differential growth processes. To visualize c...

Natural variation in the human sex ratio.

Analysis of the effect of multiple birth, birth order, age of parents and the sexes of preceding siblings on the secondary sex ratio was performed for 815 891 children, born in Denmark, 1980-1993. The proportion of males was analysed as a function of multiple birth, birth order, age of parents and the sexes of preceding siblings, using contingency tables, chi(2) tests and logistic regression an...

Managing Homo Sapiens

A The evolutionary process in general, and human evolution in particular, are basic to comprehending Homo sapiens. Human evolutionary heritage predisposes human behaviour, and that is what all management systems (including Total Quality Management) seek to affect via training, coordination, and motivation. The evidence of behavioural biology and evolutionary psychology points to two huma...