There is support for perceived social distance in determining the optimistic bias. Wikipedia has a longstanding controversy concerning gender bias and sexism. Generally, there is a tradeoff between bias and variance. They showed statistical evidence for publication bias. In certain situations, this tendency can bias people's conclusions. This would arguably bias any result in favor of a positive outcome. It is better expressed as a cultural liberal bias. Rather has been accused of having a liberal bias. Accordingly, this may bias or persuade an individual's attitude. A first issue is the tradeoff between "bias" and "variance". Mexico still has a gender educational bias. Schizophrenia is an example of a disorder that directly affects the hindsight bias. He called for the eradication of racial bias in the police force. It is a type of cognitive bias. The result is a form of ascertainment bias.