Emily and Ryan are 18-month-old twins. Their mother has been drinking heavily since her husband left her when the twins were 6 weeks old. Emily and Ryan are likely to develop which type of attachment?

Which of the following students provides the best summary of the decline of behaviorism and the rising popularity of the cognitive approach?

a. Sarah: "Psychologists began to realize that the behaviorists only emphasized behavior, and they admired how the cognitive approach emphasized people's emotional experiences." b. Harlan: "Many psychologists favored the cognitive approach, because the behaviorist approach could not account for complex thought processes." c. Ilia: "Most psychologists thought that the behaviorist approach was too heavily influenced by its early gestalt principles." d. Savita: "In general, psychologists realized that the cognitive approach was better than the behaviorist approach in explaining individual differences."

Which of these sibling pairs will share the greatest number of genes?

A) two brothers who were born of the same two parents 18 months apart B) a brother and sister who are fraternal twins C) two brothers who develop from the same fertilized egg D) two sisters who are fraternal twins