Cognitive biases in gambling

• What did Griffiths (1994) find in his study of gambling?

  • regular gamblers showed more irrational verbalisations (14%) compared to non-regular gamblers (2.5%)
• What is the Gambling Belief Questionnaire? (Joukhador et Al 2003)

  • a 65-item scale measuring cognitive biases in gambling, showing problem gamblers score higher than social gamblers
• Why might cognitive biases be a description rather than an explanation of gambling?

  • they do not allow predictions about when a person will use a particular bias
• What example did Griffiths (2013) give to show the unpredictability of biases?

  • in a UK National Lottery triple rollover, some used representativeness bias (choosing 13), while others used availability bias (avoiding 13)