Psychology is a science of behaviour. Behaviour may be implicit or explicit. Explicit behaviour can be understood more easily than implicit behaviour. However, the human behaviour is influenced by many factors. These factors cannot be understood easily by casual observation. Psychological tests help us in this direction .Anne Anastasi, a famous psychologist in field of psychological testing has defined as, ‘A psychological test is essentially an objective and standardised measure of a sample of behaviour’. Another definition states that, “A psychological test is a standardised procedure to measure quantitatively or qualitatively one or more than one aspect of a trait by means of a sample of verbal or non-verbal behaviour”. From the above definitions, it is clear that a psychological test is a structured technique used to generate a carefully selected sample of behaviour. This behaviour sample is used in turn, to make inferences about the psychological attributes among the people like intelligence, self-esteem etc. The psychological tests can be classified into two categories: (i) on the basis of the nature of testing, (ii) on the basis of functions of tests. In each category there are so many tests to suit the age, sex, need of the tester, purpose of testing, etc.