ratory experiments use probability and logic theories to assess rationality2 and find people having difficulties in processing that type of information. An average person is claimed to be systematically wrong in deductive reasoning and judging probabilities. According to Nisbett & Borgida in 1975, 'psychological evidence have bleak implications for human rationality' and man is not a reasonable intuitive statician and cannot handle probabilities or making predictions (Kahneman & Tversky, 1972). Found irrational2 in labs, people could still be rational1 in life.
             In a typical experimental task, participants will be given a set of information to evaluate and reach a conclusion. This is where errors in evaluation or selection of conclusions in deductive problems appear because participants are likely to be influenced/biased by the believability o
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