ABSTRACT
Objective
This study examined the reliability test of the Five Digits (FDT), an assessment tool of attentional processes based on Stroop paradigm. The test uses numbers and quantities for the assessment of attentional interference effect.
Methods
We assessed 49 Brazilian adults through FDT. Participants performed the test on two occasions, about two weeks apart. The test reliability was estimated by internal consistency (split-half method) and the evaluation of test-retest stability (intraclass correlation coefficient and Wilcoxon test for repeated measures).
Results
The mean response time of the participants showed a slight improvement in the simpler test measures and more pronounced in the more complex ones. The internal consistency of the test was 0.9. The test-retest stability varied depending on the test stage, where all correlations were significant (p < 0.01) and explained between 60% and 90% of the explained variance.
Conclusion
FDT provides robust evidence of reliability of the sample investigated. This was the first Brazilian study to evaluate this property by test-retest method. The results provide a better applicability of FDT in clinical and research settings.
Attention; executive functions; Stroop test; neuropsychological assessment; psychological assessment
