A researcher who uses a true experimental design would also use random assignment to place participants into each of the treatment and control conditions.Why is this necessary? How does this allow the researcher to assign cause-and-effect to the findings of the study?

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The Answer of A researcher who uses a true experimental design would also use random assignment to place participants into each of the treatment and control conditions.Why is this necessary? How does this allow the researcher to assign cause-and-effect to the findings of the study?

A Researcher Who Uses a True Experimental Design Would Also