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on August 8, 2007 at 12:16:58 pm
 

Welcome to Bias and Belief

 

This is a site about biases in thinking and judgement, especially motivated bias; how what people want affects what they believe. If you've read about cognitive biases on WikiPedia and want to learn more, this site may be for you. You might like to see my reading recommendations.

 

Most of all, this site is about my PhD thesis.

 

Four ideas about bias

 

A lot of what we think of as human irrationality is actually rational behaviour in pursuit of biased goals. For example, in forming opinions we don't always seek true opinions; we sometimes prefer opinions that justify our behaviour or give us comfort. "Everybody knows" that most human beings are stupid or ignorant; what psychology has shown is that all human beings have many directional, systematic biases. (more)

 

The only real cognitive failing - the one with disastrous effects - is egotism. There is nothing wrong with knowing nothing about a subject, so long as you don't offer opinions or make important decisions about it. There is nothing wrong with having a flawed memory or flawed judgement, so long as you don't deny those flaws and insist you see things correctly. Egotism and overconfidence turn an error into a disaster.

 

A scientist's conclusions reflect his or her values, but this isn't in itself a bad thing, because there are distinctive scientific values, for example the value of truth, predictive power or informativeness. Not all values are value biases. Science is the best system we have for identifying and overcoming bias.

 

The scientific process requires that there is honesty, freedom of speech, that any idea can be challenged and that ideas prove themselves against evidence, not ideology. The political process of an open, free society requires that any idea can be challenged, that decision-makers can be held responsible, and that they justify their actions solutions rather than sticking to an ideology. Development of (one aspect of) personal virtue requires that we challenge our own ideas, admit our mistakes and learn from them, identify our own delusions a try to remove them. The three ideas of scientific inquiry, political liberalism and epistemic virtue have the same root, both historically and logically.

 

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