Frederick trained his parrot to open the door to his cage by pecking at a lever three times. Frederick used a _____ schedule of reinforcement to encourage the desired behavior
a. variable interval
b. variable-ratio
c. fixed interval
d. fixed-ratio
Answer: D
Rationale: Reinforcement is delivered after a specific number of responses have been completed.
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Imaginary playmates are a sign of possible developmental problems
Indicate whether the statement is true or false
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