An exercise in bias // Irrational Expectations

For an interesting exercise, look for heuristics and resultant cognitive biases for one week, in your own thinking, colleagues, the news, etc. Examples would include some of the following:

The gambler's fallacy (belief that there will be a corrective bias, e.g. "luck must break")
Belief in small numbers (that sample sets are very alike and highly representative of the population)
Expectation that randomness does not carry patterns
Belief that portions of a distribution represent the distribution (like the second above)
Ignoring base data, i.e. prior probabilities, in determining likelihoods
Ignoring the prediction of regression (it is unlikely that phenomenal performance will be followed by greater performance)

I'm interested to see if and where these biases are ingrained in formal decision making systems in both business and public policy.

Originally published 2007-12-03