A schedule of reinforcement in that occurs unpredictably (e.g., the time before reinforcement varies) is called a _____ schedule, and is best for producing slow and steady responses.
A. Mixed interval
B. Variable interval
C. Rotating interval
D. Variable ratio
Answer: B. Variable interval
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The thalidomide tragedy during the 1960s showed that
a. saving money with low-cost drugs is no bargain. b. sexually transmitted diseases exert harmful effects on the child even years after the disease was cured. c. animal testing of new drugs does not guarantee their safety for humans. d. dietary factors interact with drugs in unexpected ways.
In addition to large brains, which of the following evolved alongside of social complexity?
a. an extended juvenile period c. a prehensile thumb b. upright walking d. territorialism
Suppose you take a piece of candy out of a jar, look to determine its color, then put it back into the jar before you randomly select the next piece of candy. This type of sampling is called
a. an independent event. c. a dependent event. b. sampling with replacement. d. sampling without replacement.
Leigh is a depressed teenager who shows a persisting pattern of poor self-esteem, motivation, and academic achievement. For students like Leigh, the transition to high school __________
A) often means more personal attention and less whole-class instruction B) tends to give them more chances to participate in classroom decision making C) usually means an increase in grade point average D) often marks a rise in out-of-school problem behaviors