Question

criteria for good test

Answer 1

Objectivity of a test is an important factor for it affects both the validityand reliability of the test. There are two aspects of objectivity which must be considered, while constructing a test. The first is concerned with the scoring of the test.

Answer 2

A test is said to have content validity  if its content constitutes a representative sample of the language skills, structures, etc. with which it is meant to be concerned. It is obvious that grammar test, for instance, must be made up of items testing knowledge of control of grammar. But this in  itself does not ensure content validity. The test would have content validity if  it included a proper sample of the relevant structures. Just what are the relevant structures will depend, of course, upon  the purpose of the test. We wouldn’t expect an achievement  test for intermediate learners to contain just the same set of structures as one for advanced learners. In order to judge  whether or not  a test has content validity, we need a specification of the skills or structures etc. that is meant to cover. Such a specification should be  made at  a very early stage in test construction. It is not to be expected that everything in the specification will always appear in the test; there may simply be too many things for all of them to appear in a single test.What is the importance of content validity? First, the greater a test’s content validity, the more likely it is to be an accurate measure of what it is supposed  to measure.