A primary objective of panel studies is to analyze change. The same questionnaire is used to compare data recorded at various times. Panel designs assume that the meaning of the questions and the concept of interest ...
Although the use of structural equation modeling has increased during the last decades, the typical procedure to investigate mean differences across groups is still to create an observed composite score from several indicators and to compare the composite’...
Measurement invariance is not only an important requirement of tests but also a central point in the examination of the Rasch model. Ponocny (2001) suggested quasi-exact tests for small samples which allow for formulating test-statistics based on matrices ...
Abstract. Drawing valid inferences about daily or long-term dynamics of psychological constructs (e.g., depression) requires the measurement model (indicating which constructs are measured by which items) to be invariant within persons ...