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Another idea is that a short survey should be adequate if it is well built. Of course such surveys are rare. One technique is to have each question resolve at least half of the puzzle. Then the result grows by an exponent of 2: by the fourth question there are sixteen potential categories of response, and adding the right question afterwards results in 32. Examples of variables: constructivism, functionism, intuition, pessimism/optimismhave the users personality built into the computer.perhaps created by a lenghty questionaire.to solve userfriendliness.