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Based on the concept of the probabilistic nature of statistics, explain why the results of a single empirical study cannot provide absolute certainty or definitively prove a scientific theory. In your answer, explicitly name the two types of statistical errors researchers must consider.
Question: Based on the concept of the probabilistic nature of statistics, explain why the results of a single empirical study cannot provide absolute certainty or definitively prove a scientific theory. In your answer, explicitly name the two types of statistical errors researchers must consider.
Sample answer: Because statistical conclusions in psychological research are fundamentally probabilistic, empirical findings are always subject to chance. Researchers can never completely eliminate the potential for statistical errors, specifically Type I or Type II errors. As a result, no single study can offer absolute certainty or definitively prove that a theory is true.
Key points:
- Statistical conclusions are fundamentally probabilistic.
- Findings are always subject to chance and potential statistical errors.
- Researchers cannot completely eliminate the risk of Type I or Type II errors.
- No single empirical study can provide absolute certainty or definitively prove a scientific theory.
Rubric: Full credit is awarded if the student correctly recalls that statistical conclusions are subject to chance, names both Type I and Type II errors, and explicitly states that absolute certainty or definitive proof is impossible to achieve from a single empirical study.
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Research Methods in Psychology - 4th American Edition @ KPU
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Impossibility of Proving a Theory
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