Common items, items which appear on several scales on psychological tests, are investigated in this study. It is concluded that the common item problem is not a serious one in personality measurement. (Author/JKS)

A method for examining invariance in validity of multiple-component instruments in repeated measure designs is outlined. The approach is developed within the framework of covariance structure modeling and is applicable for purposes of ascertaining temporal stability in scale validity. In addition, the procedure provides a range of plausible values…