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Based on the principles of the predictive goal of science, diagnose the flaw in the lead researcher's statement. Explain what a strong relationship actually enables researchers to forecast in a specific situation.
Case context: A research team has systematically observed that undergraduate students who attend early morning lectures regularly report higher levels of daily caffeine consumption. They have established a strong correlation between these two behaviors. The lead researcher states, 'Because we have found this strong relationship, our model will be perfectly accurate in forecasting the exact caffeine consumption of any specific student attending an early morning lecture.'
Question: Based on the principles of the predictive goal of science, diagnose the flaw in the lead researcher's statement. Explain what a strong relationship actually enables researchers to forecast in a specific situation.
Sample answer: The flaw in the researcher's statement is the claim that their forecast will be 'perfectly accurate.' According to the predictive goal of science, predictions based on a correlation do not have to be perfectly accurate. Instead, establishing a strong relationship simply enables researchers to make forecasts with a significantly greater than chance accuracy.
Key points:
- Identify the claim of 'perfect accuracy' as the fundamental flaw in the researcher's statement.
- Explain that scientific predictions based on correlations are rarely perfectly accurate.
- State that a strong relationship allows for predictions with significantly greater than chance accuracy.
- Demonstrate understanding that predictions forecast whether an event will happen in a specific situation.
Rubric: Award full credit if the student accurately identifies that predictions in science are not perfectly accurate and demonstrates comprehension that a strong correlation only provides forecasting accuracy that is significantly greater than chance.
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Research Methods in Psychology - 4th American Edition @ KPU
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