Short Answer

A psychology researcher measures the correlation between social media usage and attention span. The statistical analysis yields a pp-value of .12.12 under an alpha threshold of .05.05. In one to three sentences, apply the decision rule for a correlation test to state whether the result is significant, whether to retain or reject the null hypothesis, and what to conclude about the population relationship.

Question: A psychology researcher measures the correlation between social media usage and attention span. The statistical analysis yields a pp-value of .12.12 under an alpha threshold of .05.05. In one to three sentences, apply the decision rule for a correlation test to state whether the result is significant, whether to retain or reject the null hypothesis, and what to conclude about the population relationship.

Sample answer: Because the pp-value of .12.12 is greater than the alpha threshold of .05.05, the result is not statistically significant and the researcher must retain the null hypothesis. Consequently, the researcher should conclude that the sample fails to provide enough evidence for a population relationship between social media usage and attention span.

Key points:

  • Apply the condition that the pp-value (.12.12) is greater than the alpha threshold (.05.05).
  • State that the result is not statistically significant and the null hypothesis is retained.
  • Conclude that the sample does not provide enough evidence for a population relationship.

Feedback: Correct answers must state that the result is not statistically significant and the null hypothesis is retained because the pp-value of .12.12 exceeds the threshold of .05.05, concluding that there is insufficient evidence for a population relationship.

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Updated 2026-05-26

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Research Methods in Psychology - 4th American Edition @ KPU

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