title: Biases in quantitative judgements.
abstract: This article illustrates the biases that can occur in making quantitative judgements. The mechanisms that produce the biases are described. Ways are suggested to avoid some of the biase, but it is not possible to avoid them all.
authors.affiliation: Medical Research Council, Applied Psychology Unit, Cambridge.
authors.forename: E C
authors.initials: EC
authors.lastname: Poulton