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The moon darkened, reddened, and turned shades of gray and orange Saturday night during the first total lunar eclipse in nearly three years, thrilling stargazers and astronomers around the world. The Earth's shadow took over six hours to crawl across the moon's surface, eating it into a crescent shape before engulfing it completely in a spectacle at least partly visible on every continent.

QUIZ #4

An antecedent stimulus that sets the occasion for the imitative behavior is:

A. a chaining of behaviorsB. an imitative response chainC. an operative behaviorD. a model

2. DRL stands for Differential Reinforcement of Low Rates.

a. Trueb. False

3. Which of the following is an intermittent schedule of reinforcement?

a. Variable Ratio (VR)b. Fixed Interval (FI)c. Both a and b

4. Gradually increasing the response ratio or the extent of the time interval of a schedule of reinforcement is called

A. Schedule thinningB. Schedule adjunction

C. Schedule priming D. Schedule fixing

5. The Variable Ratio Schedule of reinforcement tends to produce a  

A. High Rates of responseB. Low Rates of ResponseC. Suspended Rates of ResponseD. No rate of response