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Index/Topics/Social-desirability bias in surveys

Social-desirability bias in surveys

The tendency of respondents to over-report socially approved behavior and under-report stigmatized traits in surveys.

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2 results
Jan 15, 2026

How much do self-reported penis sizes differ from clinician-measured sizes and what drives that bias?

Clinical measurement studies put the average erect penis length near 12.95–13.92 cm (≈5.1–5.5 in), a figure consistently lower than averages reported in self‑report surveys, which commonly cluster aro...

Jan 8, 2026

How much do self-reported penis sizes differ from clinician-measured values in peer-reviewed studies?

Peer-reviewed work consistently finds that self-reported penis lengths are larger than clinician-measured values, with typical gaps on the order of about 0.8–1.5 inches (2–4 cm): many self-report surv...