Parent-child resemblance and kin investment: Physical resemblance or personality similarity?

Resemblance between parents and children has been suggested as an indicator of kinship. Because men, unlike women, cannot be certain about parenthood, resemblance may influence men more than women when making investment decisions. In the present paper we examine the relation of physical resemblance and personality similarity with parental investment for 90 Dutch parents and their school-age children. For mothers investment was linked to personality similarity, whereas for fathers investment was linked to physical resemblance, suggesting that fathers are influenced by physical cues when making investment decisions, whereas mothers are influenced by psychological cues.