An exploratory study on the optimal composition method of the General Abilities Test for new staffs

Exploratory-factor analysis revealed that only one factor was found by principle component analysis.Four short forms of tests were created,the number of subtests increased by 3,4,5,6corresponding to factor loading of subtests.The same procedure was conducted using stepwise regression.It was found that correlation between four short forms based on factor analysis,and the full form was significant.It was also found that difference between all four short forms,and the full form was significant.Correlation between the four short forms based on stepwise regression,and the full form was significant.It was found that difference between the short forms which contained three and four subtests,and the full form was not significant.When60 was used as the pass line,total hit ratio of short forms based on factor analysis was comparatively higher than those based on stepwise regression.However,positive hit ratio was comparatively lower than those based on stepwise regression.When 70 was used as the pass line,total hit ratio of short forms based on factor analysis was comparatively higher than those based on stepwise regression.It can be concluded that features of short form including correlation with full form,coverage and hit ratio based on stepwise regression are better than that based on factor analysis.