According to the brood reduction hypothesis, parents adjust their brood size in response to current environmental conditions. When resources are abundant, parents can successfully raise all hatched offspring, but when resources are scarce, brood reduction, i.e., the sacrifice of some siblings to secure the quality of a subset of offspring, may maximize fitness. Differential transfer of maternal...

AIM The aim of the researches was to inspect the relation between borderline personality and Machiavellianism as well as the tendency to apply various manipulation tactics in everyday life and in therapy. METHOD The test used an original/authors' survey for testing the tendency to employ manipulation tactics as well as a MACH-IV questionnaire (Christie, Geis, 1970) for measuring Machiavellian...

This study examines the effect of using children as begging guides by people with sensory disabilities in Africa. It argues that some African countries, visually impaired persons, especially parents and relatives, have devised strategy abusing their or someone very close to them for financial gain. While this has remained a recurrent problem severe social, economic, political, legal implication...