The Effect of the Correlation between Dimensions and Examinees

Abstract

This study attempts to investigate the effects of the strength of the relationship between dimensions0.0, 0.5,0.9and examinees ability levels low, moderate, high on ability of four indices Q3, Fisher Z, , and the mean of pair twice correlation coefficient testing locally independent items for the data generated from locally dependent items. Three group of examinee (9000) each responses are generated on basis of three dimensional tests (each dimension contains 36 uni-dimensional items); the groups are different in the strength of inter-dimensional correlation. For each group, three levels of examinees ability are chosen. The results obtained show that the percentage of local item pairs does not change on the, though the Inter-dimensional correlation strength varies. And the index means of the pair twice correlation coefficient ranks second, followed by the indices Fisher Z and Q3. This study also travels that the percentage of local item pairs does not vary when the level of examinees ability varies by using index.; the percentage decreases when Fisher Z, Q3 is used , though the inter-dimensional correlation are different

Keywords: Q3 index, index, Fisher Z index, the means of pair twice Correlation coefficient.