The data was analyzed by SPSS software.įindingsAll of the questions in PDQ had satisfactory content validity. The Kappa agreement coefficient between PDQ and DDST II was determined. Interrater methods and Cronbach's α were used to determine reliability of the test. They were also evaluated by DDST II simultaneously. The test was performed on 237 children ranging from 0 to 6 years old, recruited by convenient sampling, from four health care clinics in Tehran city. MethodsAfter translation and back translation, the final Persian version of test was verified by three pediatricians and also by reviewing relevant literature for content validity. Denver Developmental Screening Test Ii Pdf Free Download.