Describe the properties of a good psychological test.

A psychological test is characterized by the following:

• ·         It is a standardized instrument.
• ·         Objectivity is one of the characteristics of a standardized instrument.
• ·         Measures one or many psychological attributes – mental ability, personality, interest, attitude, aptitude, etc.
• ·         Measurement is done through verbal or non-verbal responses.
• ·         Sample of behaviour may be observed or studied through psychological tests.
• ·         The test results are given in terms of scores or categories.

A good psychological test is always a standardized test, which means that the test follows a uniform and systematic procedure of administration and scoring. The main characteristics of a good test are that it should be reliable, valid, possess good norms and should be appropriate for the persons’s age, cultural, linguistic and social background. The standardized test has a manual in which the reliability, validity and the norms are provided.

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