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Background and Aim: In some disorders, word finding is difficult. There is different ways to assess naming process that verbal fluency is one way. So far has not been an index to verbal fluency assessment and treatment, the aim of this study was to determine normative data of semantic fluency for 18-69 -year – old adult Persian speakers.
Materials and Methods: This study was cross sectional and analytic. Participants were 540 normal adults 18-69 -year – old. They were divided in 4 age groups ( 18-30, 31-43, 44-56, 57-69) and 3 educational groups (0-8, 9-12, >12). The peoples were asked to name animals and fruits in 60 seconds, words were recorded and analyzed whit Troyer method and SPSS 16 software.
Results: The findings of this study did not show significant differences in semantic verbal fluency, clusters mean and number of switches between two genders. But significant differences were found in semantic verbal fluency (P=0.000) and number of switching (P=0.000) between educational groups. Also significant differences were found in semantic verbal fluency (P=0.014), clusters (P=0.000) mean and number of switching (P=0.000) between age groups.
Conclusion: Semantic verbal fluency and number of switching increase by promoting the education but decrease by rising of participant age. Clusters mean increase by rising of participant but the education had not significant effect. Gender had no effect on none of them. The findings of this study are consistent with other studies and difference in findings in some of studies, could cause of different in educational and age partitions.