Determine about the The Halstead Category Test

 This test is a concept identification procedure in which the subject must discover the method or principle that governs various series of geometric forms and verbal and numerical material. The apparatus for the test contains a display screen with four horisontally arranged numbered switches placed beneath it. The stimuli on slides and the examiner use a control console to administer the procedure. The subject is asked to press the switch that the picture reminds him or her of, and is given with additional instruction