Although a single theory of the cognitive psychology of gambling is un
likely to fully explain persistent gambling, a number of recent studie
s have shown that there may be a strong cognitive bias involved in gam
bling behaviour. In this study a number of factors and variables relat
ing to the cognitive psychology of fruit machine players were examined
in 60 subjects (30 regular and 30 non-regular gamblers) in a British
amusement arcade. This involved the use of the 'thinking aloud method'
and an examination of the role of skill using both objective (behavio
ural) and subjective (self-report) measures. Results showed that regul
ar gamblers produced significantly more irrational verbalizations than
non-regular gamblers, and that on subjective measures regular gambler
s were significantly more skill oriented. Results of the objective mea
sures demonstrated that with the same amount of money regular gamblers
can gamble more times than non-regular gamblers but this was not sign
ificant. The implications of these results are discussed and suggestio
ns are made about the application of the results to the treatment of p
athological gambling.