Illicit use of which of the following drugs has become widespread, especially by people seeking to stay awake and by those who think these drugs can improve their mental or physical performance?

In which of Piaget's sensorimotor stages do infants adapt, anticipate, and become more deliberate in responding to people and objects?

stage one stage two stage three stage four

In the research study described by your authors, which of the following factors was shown to be associated with an increase in sleep-related problems in children?

a. one extra hour of nighttime media usage by children b. regularly watching violent media after dinner time c. watching media with a siblings present but no parents in the room d. watching adult news broadcasts instead of children's programming