For questions about systematic patterns of deviation in judgment from normative decision-theoretic expectations.
Cognitive bias is a pattern of deviation in judgment that occurs in particular situations, leading to perceptual distortion, inaccurate judgment, illogical interpretation, or what is broadly called irrationality. Implicit in the concept of a "pattern of deviation" is a standard of comparison with what is normatively expected.
Questions having the bias tag regards cognitive bias in general.
Reference: http://en.wikipedia.org/wiki/Cognitive_bias
