questionnaires

Passive imputation and parcel summaries are both valid to handle missing items in studies with many multi-item scales

© 2016, © The Author(s) 2016. Previous studies showed that missing data in multi-item scales can best be handled by multiple imputation of item scores. However, when many scales are used, the number of items will become too large for the imputation …

Analyzing Incomplete Item Scores in Longitudinal Data by Including Item Score Information as Auxiliary Variables

Copyright © Taylor & Francis Group, LLC. The aim of this study is to investigate a novel method for dealing with incomplete scale scores in longitudinal data that result from missing item responses. This method includes item information as auxiliary …