Validity and reliability of the Persian version of the test of word finding, Second edition 8-11 year old children: Intermediate form

There is word finding problems among children with language and learning disorders. One of the most popular evaluation ways for word finding is formal assessment. The test of word finding- second edition is a most reliable one. In this study, validity and reliability of this test is determined in Isfahanian 8-11 year- old students. This is a transactional- descriptive survey. After translation and change, the test of word finding randomly administered in 210 children 8-11 year- old. Parent’s permission was taken, too. Test’s items were analyzed by using Item-Response Theory and entering responses’ pattern in form of numbers (zero and one) in Bilog-MG(6) software. Then, reliability was achieved by using Cronbach’s coefficient alpha and statistical indexes of intermediate form were calculated by using SPSS (13) software. The mean of word finding scores in 3 age group (8, 9, 10, 11 years) were 40.30, 45.51, 48.05 and 45.11 respectively. It shows that when the children become older, the mean of scores increase gradually (Pvalue: 0.00, α: 0.05). Also the reliability of test was 0.84. The discrimination power of items in Persian students is equal to the discrimination power of German's test. It shows that this test has a good potential to differentiate between students with various word finding abilities. Reliability of this test is good based on psychometric indexes. Therefore, a valid and reliable test to evaluate word finding of Persian children is produced.