Item reliability means the reproducibility of item placements if they are given to another sample
that has the same characteristics . The item reliability was excellent, i.e. 0.99 based on the rating scale instrument quality criteria. This indicated that the items had large difficulty range and sample of students. Item reliability also verifies that the instrument constructs validity. Separation is the distribution of position for the person and item along the variable. Since the item separation was 8.89, which was higher than 1.0, it showed that the items had adequate spread