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Index/Topics/Self-Report Bias

Self-Report Bias

The bias introduced by self-reported data

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2 results
Jan 27, 2026
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How are penis length percentiles measured and what sample sizes are used?

are produced by measuring many men using standardized clinical techniques (bone-pressed length from pubic bone to glans tip, measured flaccid, stretched, or erect, and circumference at shaft/base), po...

Jan 24, 2026
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How do self-reported penis size surveys compare to clinical measurement studies and what biases affect them?

Self-reported consistently yield larger averages than , a discrepancy documented across multiple reviews and primary studies . The gap reflects predictable measurement and sampling biases—, volunteer ...