The truly false consensus effect: an ineradicable and egocentric bias in social perception.

Consensus bias is the overuse of self-related knowledge in estimating the prevalence of attributes in a population. The bias seems statistically appropriate (Dawes, 1989), but according to the egocentrism hypothesis, it merely mimics normative inductive reasoning. In Experiment 1, Ss made population estimates for agreement with each of 40 personality inventory statements. Even Ss who had been educated about the consensus bias, or had received feedback about actual consensus, or both showed the bias. In Experiment 2, Ss attributed bias to another person, but their own consensus estimates were more affected by their own response to the item than by the other person's response. In Experiment 3, there was bias even in the presence of unanimous information from 20 randomly chosen others. In all 3 experiments, Ss continued to show consensus bias despite the availability of other statistical information.

[1]  S. Asch.  Studies of independence and conformity: I. A minority of one against a unanimous majority. , 1956 .

[2]  C. Peterson,et al.  SAMPLE SIZE AND THE REVISION OF SUBJECTIVE PROBABILITIES. , 1965, Journal of experimental psychology.

[3]  D. S. Holmes,et al.  Dimensions of projection. , 1968, Psychological bulletin.

[4]  A. Tversky,et al.  BELIEF IN THE LAW OF SMALL NUMBERS , 1971, Pediatrics.

[5]  A. Tversky,et al.  Judgment under Uncertainty: Heuristics and Biases , 1974, Science.

[6]  R. D. Hansen,et al.  The power of consensus: Information derived from one's own and others' behavior. , 1977 .

[7]  Mark R. Lepper,et al.  Social explanation and social expectation: Effects of real and hypothetical explanations on subjective likelihood. , 1977 .

[8]  L. Ross,et al.  The “false consensus effect”: An egocentric bias in social perception and attribution processes , 1977 .

[9]  D. Nowlan,et al.  Costs and benefits. , 1980, Irish medical journal.

[10]  R. Zajonc.  Feeling and thinking : Preferences need no inferences , 1980 .

[11]  Frank J. Bernieri,et al.  Determinants of consensus estimates: Attribution, salience, and representativeness , 1982 .

[12]  D. Krantz,et al.  The use of statistical heuristics in everyday inductive reasoning , 1983 .

[13]  Steven J. Sherman,et al.  The role of the evaluation and similarity principles in the false consensus effect , 1984 .

[14]  Steven J. Sherman,et al.  Mechanisms Underlying the False Consensus Effect , 1984 .

[15]  D. Paulhus.  Two-component models of socially desirable responding. , 1984 .

[16]  M. Lepper,et al.  Considering the opposite: a corrective strategy for social judgment. , 1984, Journal of personality and social psychology.

[17]  R. Cialdini,et al.  Imagining Can Heighten or Lower the Perceived Likelihood of Contracting a Disease , 1985 .

[18]  Brian Mullen,et al.  The false consensus effect: A meta-analysis of 115 hypothesis tests , 1985 .

[19]  C. McCauley,et al.  Patients' perceptions of treatment for kidney failure: The impact of personal experience on population predictions , 1985 .

[20]  H. J. Einhorn,et al.  Accepting error to make less error. , 1986, Journal of personality assessment.

[21]  Inferring category attributes from exemplar attributes: geometric shapes and social categories. , 1988, Journal of personality and social psychology.

[22]  David Faust,et al.  Eliminating the hindsight bias. , 1988 .

[23]  J. Kagan,et al.  Rational choice in an uncertain world , 1988 .

[24]  Robyn M. Dawes,et al.  The potential nonfalsity of the false consensus effect. , 1990 .

[25]  H. Arkes.  Costs and benefits of judgment errors: Implications for debiasing. , 1991 .

[26]  J. Krueger.  Accentuation effects and illusory change in exemplar-based category learning , 1991 .

[27]  Clark C. Presson,et al.  Self-Protection and Self-Enhancement Biases in Estimates of Population Prevalence , 1992 .

[28]  J. Krueger,et al.  Social categorization and the truly false consensus effect. , 1993 .