Continue to administer to collect norms and evidence for reliability and validity. Occasionally Most of the time Item Analysis Analysis to determine how well each item relates to all other items. The extent to which the items of a scale are related. Used to select items. Items kept that meet a criterion, usually .30 to .40.
Coefficient alpha is rechecked after weak items are removed.
It should increase. 0.966585 Raw Variables Std. Time frame depends on theoretical stability. All rights reserved, Last modified October 30, 1998.