The contemporary social view of marriage in midlife is one of __________ and __________

What are mental categories representing activities, objects, qualities, or situations that share some common characteristics?

a) classes b) concepts c) attributes d) classifications

In one study, students from one school were asked to help students at another school. When the school to be helped had scored higher than the school of students asked to help, students offered more help to the school that was doing better than they were

This is called _______. A) kinship selection B) reciprocal altruism C) competitive altruism D) defensive helping E) empathic joy