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A developmental psychologist is evaluating two different research designs to study sibling conflict:

  • Design A: The researcher observes siblings playing in their family homes for several hours, coding conflict behaviors as they occur naturally.
  • Design B: The researcher brings siblings into a laboratory playroom, introduces a standardized game designed to trigger mild competition, and codes three specific behaviors during a controlled 10-minute session.

In evaluating these options, the psychologist chooses Design B (a structured observation) because it allows them to efficiently elicit and systematically code low-frequency competitive behaviors under identical, controlled conditions. However, when critiquing this choice, the researcher must recognize that a major methodological trade-off of this artificial, structured setting is a reduction in ____ validity compared to the naturalistic approach.

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Updated 2026-06-15

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Research Methods in Psychology - 4th American Edition @ KPU

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