Essay

Based on the provided example of predicting Grade Point Average (GPAGPA) from Intelligence Quotient (IQIQ), recall and describe the prerequisite research step that must be completed before researchers can apply a simple regression equation. Explain what this prerequisite step establishes and how the resulting regression equation is used.

Question: Based on the provided example of predicting Grade Point Average (GPAGPA) from Intelligence Quotient (IQIQ), recall and describe the prerequisite research step that must be completed before researchers can apply a simple regression equation. Explain what this prerequisite step establishes and how the resulting regression equation is used.

Sample answer: Before researchers can apply a simple regression equation to predict a student's GPAGPA from their IQIQ, correlational research must first establish that there is a relationship between IQIQ and GPAGPA. Once this relationship is established, researchers can use a simple regression equation to calculate an individual's expected GPAGPA based on their specific IQIQ score.

Key points:

  • Correlational research must first establish a relationship between IQIQ and GPAGPA.
  • A simple regression equation is applied after the correlation is established.
  • The regression equation calculates an individual's expected GPAGPA given their specific IQIQ score.

Rubric: To receive full credit, the answer must identify that: 1) Correlational research must first establish a relationship between IQIQ and GPAGPA. 2) A simple regression equation is then used to predict or calculate an expected GPAGPA. 3) This calculation is performed for an individual given their specific IQIQ score.

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Updated 2026-05-27

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KPU

Research Methods in Psychology - 4th American Edition @ KPU

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