The Research Method in Which the Investigator Manipulates a Variable

question 143

Multiple Choice

The research method in which the investigator manipulates a variable under carefully controlled conditions and observes whether any changes occur in a second variable as a result is the

• A) scientific method.
• B) correlational method.
• C) descriptive method.
• D) experimental method.

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Definitions:

Negative Reinforcement

A behavioral principle involving the removal of an undesirable or unpleasant stimulus to increase a desired behavior.

Fixed-Interval

A schedule of reinforcement where a response is rewarded after a set amount of time has passed, used in behavioral studies.

Variable-Interval

A schedule of reinforcement where a response is rewarded after an unpredictable amount of time has passed, in experimental and learning contexts.

Variable-Ratio

A schedule of reinforcement where a response is rewarded after an unpredictable number of responses, commonly used in behavior modification and training.