Social Desirability Bias
🇳🇴Sosial ønskverdighetsskjevhetDefinition
Social desirability bias is the systematic tendency to present oneself in a favorable light by over-reporting socially approved behaviors and under-reporting socially disapproved ones. It affects both self-report surveys and face-to-face interactions, distorting data and interpersonal communication in predictable ways.
Edwards (1957) first formalized the concept, and Crowne and Marlowe (1960) developed the widely used Marlowe-Crowne Social Desirability Scale to measure individual differences in the tendency. The bias operates on two levels: impression management (deliberate self-presentation to others) and self-deception (unconsciously believing one's own inflated self-image).
Real-world example
In health research, studies consistently show that people over-report exercise frequency by 40-60% and under-report alcohol consumption by 30-50% compared to objective measurements. This 'say-do gap' has major consequences for public health policy based on self-reported data.
In the workplace, employee engagement surveys often show inflated satisfaction scores when respondents suspect their answers aren't truly anonymous. Companies that switched to genuinely anonymous third-party surveys found satisfaction scores dropped by 15-20 percentage points — revealing problems that had been hidden by social desirability bias.
Supplementary perspective
Social desirability bias is deeply connected to groupthink (where the desire for conformity suppresses honest dissent) and the bandwagon effect (where people adopt behaviors they believe are popular). It also interacts with the courtesy bias, where respondents in certain cultures give answers they believe the questioner wants to hear. Understanding these connections is crucial for anyone designing research instruments, performance reviews, or feedback systems.
Practical advice
Recognize
- —Notice when you're crafting responses based on 'what sounds good' rather than what's accurate.
- —Ask: 'Would my answer change if no one would ever know what I said?'
- —In research, watch for suspiciously positive distributions — when 95% of respondents report 'good' or 'excellent,' social desirability is likely at play.
Counteract
- —Use guaranteed anonymity and emphasize it clearly to reduce impression management motivation.
- —Employ indirect questioning techniques: ask about 'people you know' rather than the respondent directly.
- —Include behavioral measures alongside self-reports — what people do often diverges from what they say they do.
Ethical use
- —Design feedback environments where honesty is valued and rewarded over conformity.
- —Create psychological safety (Edmondson, 1999) so team members can share uncomfortable truths without fear of social punishment.
- —When presenting findings, acknowledge the likely direction and magnitude of social desirability effects in self-reported data.