The research that represents the first attempts to provide broad picture of sexual behavior in the United States was conducted by

If a common evolutionary heritage marks all human beings, then we should

expect (a) human behavior to be much more variable than that of other animals (b) fitness-enhancing cultural universals (c) no individual differences or group differences at all in human beings (d) people within a culture to be highly variable

Which of the following statements about attachment is supported by research?

A) Mothers of resistant infants tend to be overstimulating and intrusive. B) Securely attached infants often receive inconsistent care. C) Persistently depressed mothers tend to promote an avoidant attachment classification. D) Mothers of resistant infants are often unresponsive to infant signals.