OBJECTIVE: This study aimed at evaluating reliability evidence of neuropsychological instrument Iowa Gambling Task (IGT) by the means of the test-retest method. METHOD: The sample was comprised of 50 healthy subjects, 19-75 years of age, with at least five years of formal education. The assessment was done individually, in two meetings with an interval from 1 to 6 months between test and retest. RESULTS: The findings showed a significant moderate positive correlation between test-retest in the overall calculation. In the analysis by segments, a significant moderate positive correlation was found for blocks 4 and 5, whereas there were no significant correlations for blocks 1, 2 and 3. CONCLUSION: These data corroborate recent studies that found moderate correlations between test-retest measures of executive functions, and suggest that the IGT can be used to assess decision making over time if specific analyses are taken into account.
Executive functions; decision making; Iowa Gambling Task; reliability
