Joe was brought up in a household in which both of his parents worked outside the home, and both they and the children shared responsibilities for housework. when joe left home and went to college, he joined a fraternity and became friends with some members who held rather sexist attitudes towards women's roles. when joe came home for the summer, his parents were surprised to find that joe expected his mother to do his laundry and pick up after him. joe's new attitudes were most likely a function of: