Viable methods for the identification of item misfit or Differential Item Functioning (DIF) are central to scale construction and sound measurement. Many approaches rely on the derivation of a limiting distribution under the assumption that a certain model fits the data perfectly. Typical DIF assumptions such as the monotonicity and population…

Four hypotheses regarding stability of response process and response in personality testing are tested and supported. (RC)

The effects of repeaters (testees included in both administrations of two forms of a test) on the test equating process are examined. It is shown that repeaters do effect test equating and tend to lower the cutoff point for passing the test. (JKS)

A number of empirical studies are suggested to answer certain questions in connection with flexilevel tests. (MS)

A multiple true-false item is one where a testee has to identify statements as true or false within a cluster (of two or more) of such statements. Clusters are then scored as items. This study showed such a procedure to yield less reliable results than traditional true-false items. (JKS)