The use of learning principles to change problems, such as overeating, unrealistic fears, or temper tantrums, is called

To assist in his experimental analysis of behavior, Skinner invented a device known as the "operant chamber." This apparatus was designed to allow researchers to manipulate

a. an organism's level of motivation. b. the amount of planning behavior that was required of an organism. c. an organism's state of mind. d. the consequences of an organism's behavior.

Which type of sensory receptors is found in greatest numbers in the skin?

a. touch receptors b. warmth receptors c. pressure receptors d. pain receptors