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A psychology researcher wants to use sleep duration to forecast cognitive test scores in a new study. Briefly state what the researcher must do with existing data regarding the statistical relationship between these two variables before they can apply it to predict outcomes.

Question: A psychology researcher wants to use sleep duration to forecast cognitive test scores in a new study. Briefly state what the researcher must do with existing data regarding the statistical relationship between these two variables before they can apply it to predict outcomes.

Sample answer: The researcher must first observe the statistical relationship between the two variables in existing data and then determine the strength of that correlation before applying it to predict future cognitive test scores based on sleep duration.

Key points:

  • Observe the statistical relationship between the two variables.
  • Determine the strength of the relationship.
  • Apply these findings from existing data to forecast outcomes in similar scenarios.

Rubric: The answer must identify both observing the statistical relationship and determining its strength in existing data as prerequisites for predicting one variable based on another.

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Updated 2026-05-27

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Research Methods in Psychology - 4th American Edition @ KPU

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