Where do 95% of all HIV infections take place?

William James made his most important contributions to cognitive psychology in his work on

a. problem-solving strategies. b. memory in everyday life. c. complex decision making. d. cognitive development in children.

The majority of the crawling infants in the Gibson and Walk study of depth perception using a visual cliff

a. demonstrated no fear of crawling over the deep side. b. demonstrated depth perception. c. would crawl over the deep side when called by their mothers. d. could not discriminate the shallow side from the deep side.