Which of the following statements apply in the case of a true experiment?

AA control group and an experimental group

BA researcher-manipulated variable

CRandom assignment

DAll of the above ✓ Correct

Correct answer: (D) All of the above

Explanation

A true experiment has a control and experimental group, a manipulated variable and random assignment.

The control and experimental groups allow comparison.

The researcher manipulates the independent variable.

Random assignment equates the groups at the outset.

Naming only one element would leave the definition incomplete.

These three features together permit strong causal claims.

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