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A researcher is studying whether listening to classical music while working improves concentration. In one to three sentences, describe exactly what this researcher must mathematically calculate to evaluate their results according to the logic of null hypothesis testing, immediately after making their initial baseline assumption.

Question: A researcher is studying whether listening to classical music while working improves concentration. In one to three sentences, describe exactly what this researcher must mathematically calculate to evaluate their results according to the logic of null hypothesis testing, immediately after making their initial baseline assumption.

Sample answer: After assuming that classical music has no effect on concentration (the null hypothesis), the researcher must calculate how likely their specific sample results would be under this assumption.

Key points:

  • The calculation involves finding a probability or likelihood.
  • The probability being calculated is for the specific sample results obtained.
  • The calculation is made under the assumption that the null hypothesis is true.

Rubric: Full credit is given if the response clearly states that the researcher calculates the probability or likelihood of obtaining their specific sample results, given the assumption that the null hypothesis is true.

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Updated 2026-05-27

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Research Methods in Psychology - 4th American Edition @ KPU

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