A(n) ____ is typically developed to assess knowledge or skill

Amphetamine and cocaine __________ symptomsof schizophrenia presumably because

they __________ dopamine receptors. a. reduce; stimulate b. reduce; block c. produce; stimulate d. produce; block e. reduce; relate agonistically with

Based on several research studies, what have scientists concluded about the harmful effects of television viewing on infant developments?

a. Infants who watch more television have attention problems in childhood. b. Infants who watch more television have smaller vocabularies. c. Television is actually beneficial for children but only if their mothers have high levels of education. d. Some studies show harmful effects and some show no effect.