To help himself remember the colors of the visible spectrum, Cam said, "ROY G BIV," where each color is represented by a letter. This is an example of the use of which of the following?

Before studying conditioning, Ivan Pavlov studied ______________

A) cardiac physiology B) canine anatomy C) digestive processes D) the endocrine system

Infants pay more attention to

a. a referential style of language. c. adult-directed speech. b. an expressive style of language. d. infant-directed speech.