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Example of Restriction of Range: Age and Hip Hop Music
The statistical relationship between age and the enjoyment of hip hop music provides a clear example of how restriction of range can mislead researchers. Across the general population, there may be a strong negative correlation (e.g., ) between these variables. However, if data is collected exclusively from a restricted age group—such as - to -year-olds—the relationship appears artificially weak, dropping to a Pearson's of . This demonstrates the importance of sampling a wide range of values to accurately capture overall trends and avoid obscured results.
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Research Methods in Psychology - 4th American Edition @ KPU
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Example of Restriction of Range: Age and Hip Hop Music
Which of the following best describes the statistical issue known as 'restriction of range'?
A psychologist investigates the relationship between anxiety levels and test performance but recruits only participants whose anxiety scores fall within a narrow, moderate range. If a strong negative correlation between anxiety and test performance exists in the broader population, the psychologist's restricted sample is likely to produce a weaker correlation coefficient than what would be observed using a more representative sample.