Tim has been conditioned to blink using air puffs and a 700 MHz tone. The experimenter finds that the conditioned response also occurs for 750 MHz tones and 650 MHz tones but not for 1250 MHz tones or 500 MHz tones. Tim is displaying:

a. stimulus generalization.
b. spontaneous recovery.
c. stimulus discrimination.
d. extinction.

How did shays' rebellion reveal the need for a revision of the articles of confederation? a) shays' rebellion exposed the weakness of the central government as written in the articles of confederation. b) shays' rebellion strengthened the ideas of the anti-federalists in the need for a strong national government. c) shays' rebellion illustrated the need for organized local government factions to handle situations such as this. d) shays' rebellion encouraged others to rebel and eventually led to the overthrow of the first established government in the united states.