Since 15 percent of a university comprises Asian-American students, a sample for a study was chosen in such way that it, too, consisted of 15 percent Asian-Americans. This kind of sample would be an example of a__________

Diener et al. (1976) observed that trick-or-treaters who were asked for their names took less candy than those allowed to remain anonymous. This type of study is best characterized as

A) a case study. B) a field experiment. C) a naturalistic observation. D) a correlational study.

Baby Olivia dropped her rattle. Later, she let go of her teething ring and watched with interest. When Olivia dropped objects, she was __________ them to her sensorimotor dropping scheme

A) accommodating B) equalizing C) organizing D) assimilating