Approximately what percent of homosexual adolescents in the U.S. attempt suicide?

Partial reinforcement schedules decrease behavioral persistence.

a. true b. false

An explanation for the finding that for every hour 8- to 16-month-old infants watched an educational DVD they understood 8 to 16 fewer words than infants who watched no DVDs is ______

a. infants who watch DVDs spend less time interacting with the people around them b. infants who watch DVDs spend more time interacting with the people around them c. infants who watched DVDs spend less time looking at books d. the parents of infants who watch DVDs do not emphasize language development