The use of protodeclarative gestures requires ____
a. verbal ability and shared social attention
b. theory of mind and verbal ability
c. implicit understanding and shared social attention
d. intelligence and shared social attention
c
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Suppose that when several students raise their hands in class, the professor calls on one at random. Thus, the more often you raise your hand, the more your chance of being called, but you can never be sure when that will be. Which schedule of reinforcement is this?
a. Fixed-interval b. Variable-interval c. Fixed-ratio d. Variable-ratio
Jara's cat runs to the kitchen when she hears the sound of the can opener because the cat associates the sound with food. In this example, the cat running to the kitchen is the __________.
A. conditioned stimulus B. unconditioned stimulus C. conditioned response D. unconditioned response
Sickle cell disease is caused by a genetic mutation and, when untreated, results in disability and early death. However, the mutation that causes sickle cell disease is associated with protection against malaria, especially early in life. As a result, you would expect to see sickle cell disease ____
a. eradicated as quickly as malaria is eradicated b. occur predominantly in populations that have historically low rates of malaria and similar diseases c. occur at similar rates in all populations, since malaria can be found anywhere mosquitoes, which transmit malaria, are found d. occur at higher rates among populations whose genetic heritage can be traces to areas with a high incidence of malaria
Vi shines a flashlight into Mike's eye. The bright light will cause Mike's iris to:
A. relax and pupil to enlarge B. constrict and pupil to become smaller C. relax and pupil to become smaller D. constrict and pupil to enlarge