التحقق الإمبريقي من تكافؤ افتراضي أحادية البعد و الاستقلال الموضعي للمفردات

الملخص EN

The current research was conducted to practically explore the equivalence of Unidimensionality assumption and local independence assumption, data was obtained from administrating achievement test in psychological measurement course (on 1010 from senior students and general diploma students at faculty of education-Minia university).

The test was used after calibrating items by three parameter logistic model.

Six forms of the test were formed.

The findings indicated that Unidimensionality assumption was held in just four forms of the test and the assumption was not held in the other two forms.

meanwhile local independence assumption was held in all forms.

These conclusions mean that the verification of Unidimensionality assumption does not ensure the verification of local independence assumption.

So, the two assumptions are not equivalent.