Background and Aim: Rapid automatized naming test is the best tool for screening, assessment and early prevention of reading disorders. Therefore with regard to the importance of this test in anticipation and assessment of reading disorders and absence of valid test in this area in Persian language, the target of study was designing and measuring the validity and reliability of this test.

Materials and Methods: Based on foreign test, items of test have selected with regard to the criterions of Persian language. Then the suggestions of experts in this field were collected. Study was performed in two weeks time-out on fifty students of the governmental and nongovernmental schools of the 12th education area of Tehran and 12 dyslexic children of learning disability centers. Then, to measure the differential power and reliability of the test, the results were analyzed.

Result: Findings indicate high correlation between first and second test. There is also significant difference between two groups (normal and dyslexic) in total time of the test in two stages.

Conclusion: Rapid automatized naming test is valid and reliable in Persian language and is able to distinguish between two groups (normal and dyslexic).