Ensure test is known and understood by students and teachers.
However good the Potential backwash effect of a test may be the effect will not be fully realized if students and those responsible for teaching do not know and understand what the test demands of them, the rationale for the test , it's specifications and sample item should be mad. Available to everyone concerned with preparation for the test. This is being introduced, especially if it incorporates novel testing methods. Another equally important, reason for supplying information of this kind is to increase test reliability.