Randomization plays a significant part in experimental research. Experiments potentially control for many threats to the _____ but researchers must remain aware of these threats. The central features of the classical experiment are independent and dependent variables, pretesting and post-testing, and experimental and control groups created through random assignment.

Question

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A. This is an incorrect answer because the central features of the classical experiment are independent and dependent variables, pretesting and post-testing, and experimental and control groups created through random assignment. Randomization plays a significant part in experimental research. Experiments potentially control for many threats to the validity of causal inference.
B. This is an incorrect answer because the central features of the classical experiment are independent and dependent variables, pretesting and post-testing, and experimental and control groups created through random assignment. Randomization plays a significant part in experimental research. Experiments potentially control for many threats to the validity of causal inference.
C. The correct answer is "C" because the central features of the classical experiment are independent and dependent variables, pretesting and post-testing, and experimental and control groups created through random assignment. Randomization plays a significant part in experimental research. Experiments potentially control for many threats to the validity of causal inference.
D. This is an incorrect answer because the central features of the classical experiment are independent and dependent variables, pretesting and post-testing, and experimental and control groups created through random assignment. Randomization plays a significant part in experimental research. Experiments potentially control for many threats to the validity of causal inference.

Randomization Plays a Significant Part in Experimental Research