A psychometrician is a specialist in psychology or education who develops and evaluates psychological tests.
Test developers, publishers and psychological examiners generally release psychological test only to qualified persons who have a legitimate need to study or use these materials.
There are 3 reasons why access to psychological test is restricted.
• In the hands of unqualified persons, psychological test can cause harm.
• The selection process is rendered invalid for person who preview test questions.
• Leakage of item content to the general public completely destroys the efficacy of a test.
The access to psychological test must be limited. But limited to whom? The answer depends upon the complexity of the specific test under consideration. The APA proposed that test fall into three levels of complexity that require different degrees of examiner.
Level A: These instruments are straightforward paper and pencil measures that can be administered, scored and interpreted with minimal training. With the aid of a manual, these tests can be used by responsible non psychologists. This category includes vocational proficiency and group educational achievement tests.
Level B: These tests require knowledge of test construction and training in statistics and psychology. These products are available to persons who have completed an advanced level course in testing front and accredited college or university or equivalent training under the supervision of a qualified psychologist. This category includes aptitude test and personality inventories applicable to normal populations.
Level C; These test require substantial understanding of testing and supporting topics. Supervised experience is essential for the proper administration, scoring and interpretation of these instruments. Typically, level c test are available only to persons with a minimum of masters degree in psychology or an allied field. These instruments include individual tests of intelligence, projective personality tests and neuropsychological test batteries.
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