Which of the following is a drug that can interfere with the normal progression of sleep stages?

Tom yelled at his parrot when it started squawking in response to a noise in the hallway. As a result, it stopped squawking. According to the conditioned suppression theory of punishment, this is because:

A) ?a high probability behavior has been followed by a low probability behavior. B) ?a low probability behavior has been followed by a high probability behavior. C) ?the parrot is so emotionally upset that it is no longer inclined to squawk. D) ?the connection between the noise in the hallway and squawking has been weakened.

Ruff and colleagues (1998) showed children videotaped puppet show skits, then a reaction time task, then a free-play period. Their outcome of interest was time spent looking at or attending to the screen or toys, as well as coding for focused attention, quiet inattention, and active inattention. They found active inattention

a. decreased with age b. increased for the puppet show with age c. was similar across age groups d. was not exhibited by the youngest two age groups