Essay

Define 'converging evidence' in the context of scientific theories, and state the specific validity strengths that true experiments and correlational studies respectively contribute to a theory according to the parent text.

Question: Define 'converging evidence' in the context of scientific theories, and state the specific validity strengths that true experiments and correlational studies respectively contribute to a theory according to the parent text.

Sample answer: Converging evidence is the support of a scientific theory using multiple complementary research methods. According to the text, a true experiment contributes high internal validity to confirm causality, while a correlational study contributes high external validity to confirm real-world relevance. Having both types of support increases researchers' confidence in the theory.

Key points:

  • Converging evidence uses complementary methods to support a theory.
  • True experiments provide high internal validity to confirm causality.
  • Correlational studies provide high external validity to confirm real-world relevance.
  • Combining both methods increases overall confidence in the theory.

Rubric: Grade based on: 1) Definition of converging evidence (using complementary methods to support a theory); 2) Identifying that true experiments provide high internal validity/causality; 3) Identifying that correlational studies provide high external validity/real-world relevance; 4) Explaining that the combination increases confidence in the theory.

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Updated 2026-05-26

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KPU

Research Methods in Psychology - 4th American Edition @ KPU

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