Trish's parents give her money for taking out the trash every once in a while. Trish can never predict exactly when she will get paid. What reinforcement schedule is this?

According to Chapter 1 in your textbook, the computer-simulation method

a. attempts to explain how a computer can perform a cognitive task as quickly as possible. b. is not yet sophisticated enough to perform any cognitive task as efficiently as humans can. c. typically produces an idealized version of how humans should perform a cognitive task, rather than how they actually do perform it. d. tries to create a program that performs a cognitive task in the same way that humans would perform it.

People with insomnia can lower their arousal level before sleep by doing all of the following EXCEPT

a. using progressive muscle relaxation. b. using meditation or blotting out worries with calming images. c. writing down worries or concerns and planning what to do about them the next day. d. engaging in strenuous exercise one to two hours before bedtime.