One of the Essential Differences Between Experimental Research and Correlational

question 457

Multiple Choice

One of the essential differences between experimental research and correlational research is that

• A)in experimental research all variables are measured, whereas in correlational research at least one variable is manipulated
• B)in experimental research, subjects are randomly assigned to the levels of the independent variable
• C)experimental research uses random sampling, whereas correlational research uses random assignment
• D)experimental research has higher external validity than correlational research

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