To accurately infer cause and effect, experimenters should use:
Correct answer: D. random assignmentCounseling Services
- A. naturalistic observation
- B. standard deviations
- C. scatterplots
- D. random assignmentCounseling Services
Explanation
Random assignment places participants into groups by chance, helping ensure that pre-existing differences do not systematically affect the outcome. Naturalistic observation, standard deviations, and scatterplots can describe data but cannot establish causal direction.
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