... characteristics and he summarized in the form of the table called A checklist for Test Evaluation. The checklist is for rating of the adequacy of a test for any given purpose.Test usefulnessPracticality ... coefficient suggests that the different forms are probably not comparable; they may be measuring different things and therefore, cannot be used interchangeably.A formular for this method may be expressed ... valid, as for Hughes (1988: 42), “a test must provide consistently accurate measurements. It must therefore be reliable. A reliable test, however, may not be valid at all”. For example, in a writing...