Piaget's concept that things continue to exist even when they are out of sight is called______

Which of the following is true, according to the critics of evolutionary psychology?

a. The responses of men and women to surveys about sex and mating are often a poor indication of their actual behavior. b. Evolutionary psychologists have tended to rely on data from case studies, which can be a poor guide to the sexual behaviors of participants. c. Modern humans are not affected by evolutionary pressures. d. Too few studies have been done to conclude that sex differences exist.

According to Sigmund Freud, _____ are strategies used by the ego to help reduce stress and anxiety

Fill in the blank with correct word