VALIDITY OF INSTRUMENT
Asserting validity involved issues of the truth and correctness of a statement and whether you are measuring what you think you are measuring. Ary and Razavieh ( 1990) posited that validity of an instrument is an extent to which it measure what one thinks it is measuring and it is always specific to a particular purpose for which the instrument is being used. Salvia et. al ( 1991) stated that validity concerns the appropriateness of the inferences that can be made on the basis of test results. In other ward, validity indicates the instrument’s accuracy (Lodica, 2006). Further, Mc Burney & White (2007, p 139) view validity as an indication of accuracy in terms of the extent to which a research conclusion corresponds with reality. The foregoing suggests that validity hinges on the extent to which meaningful and appropriate inferences or decisions are made on the basis of scores derived from the instrument used in a research