In _____, oral gratification during feeding establishes the initial bond between infant and mother

To assess the presidential candidate preferences of the registered voters in Maricopa County, a researcher classifies the voters by social class and age. The researcher randomly selects voters from each subgroup according to its proportion in the entire county. This sampling technique is called _____ sampling.

Fill in the blank(s) with the appropriate word(s).

Paula is searching for the most effective treatment for bulimia. Research suggests that this will likely involve ____

a. response prevention b. relaxation training c. cognitive-behavioral therapy d. stimulant medication