Daly and Wilson (1985), (1988)
FOUND - that even when financial resources and marital staus are held constant, younger mothers are more likely to kill infants than older mothers, and older mothers are less likely to abuse or harm infants SUPPORTS simpsons theory Rimm (2002) FOUND - sibling rivalry most intense when children are close in age and need more resource investment. Sibling rivalry was also intense when one sibling was gifted. Trivers (1985) FOUND - that herring guls manipulate parents by appearing smaller than they are to elicit feeding.
Comments
No comments have yet been made