Bob's dog has been taught to catch a Frisbee by reinforcing small steps from sniffing the Frisbee to running with it to finally catching it when thrown. This is an example of:. a. stimulus discrimination. b. shaping or successive approximation. c. taste aversion. d. response generalization.

Which of these describes a social effect of the civil war? a) fields were left unplanted because the slaves had been freed and much of the male population was unavailable to plant or harvest crops. b) over 600,000 men died, mostly because of the lack of food, clean water, and hygienic medical practices. c) after the emancipation proclamation was issued, african americans were allowed to join the union army. d) lincoln’s assassination after the surrender caused a disruption in the rebuilding of the nation.