Document Type : Original Article
Aim: Due to the widespread use of digit span test, word Span, non-word span to assess cognitive abilities, particularly working memory, in this study, we compared the sensitivity and examine the psychometric properties of these tests.
Method: this research include causal cooperative, 178 subjects of both sexes with regard to the inclusion and exclusion criteria for the study, including the use of lack psychiatric drugs, lack of physical and psychiatric disorders and informed consent to participate in the study sample were chosen. Digit span test, word Span, non-word was used for data collection. The results of discriminant analysis and multivariate analysis of variance were analyzed.
Result: The results showed that non-word span test correlated with diagnostic function and a better ability to recognize the superior right. As well as non-word span test sensitivity in measuring working memory's good psychometric parallel increasing age.
Conclusion: According to the non-word span test results of the tests span word and digit the better psychometric properties, this test can be used in research and clinical settings