validation is an important enterprise especially when a test is a high stakes one. demographic variables like gender and field of study can affect test results and interpretations. differential item functioning (dif) is a way to make sure that a test does not favor one group of test takers over the others. this study investigated dif in terms of gender in the reading comprehension subtest (35 i...

shear wave velocity is a basic engineering tool required to define dynamic properties of soils. in many instances it may be preferable to determine vs indirectly by common in-situ tests, such as the standard penetration test. many empirical correlations based on the standard penetration test are broadly classified as regression techniques. however, no rigorous procedure has been published for c...

the recent increase in the number of publications devoted to teaching the persian language to speakers of other languages and the development of such courses in iran and elsewhere signify a cultural movement. however, one of the shortcomings of this movement pertains to its oblivious stance to persian language proficiency. this paper aims at defining language proficiency bringing its importance...

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