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Peer reviewedBell, Richard; Lumsden, James – Applied Psychological Measurement, 1980
The effect of test length on predictive validity is examined empirically. For four tests, the curve of validity against test length had a very gentle slope for the longer tests and all tests could be reduced by more than 60 percent without appreciable decreases in validity. (Author/BW)
Descriptors: Foreign Countries, High School Seniors, High Schools, Mathematical Models
Download full textWittmann, Werner W. – 1986
Psychometric theory has been one of psychology's stronger foundations and a major contributor to the recognition of psychology as a scientific discipline. Basic principles of psychometric theory led to the development of respected intelligence tests and large and comprehensive testing and assessment programs. This paper synthesizes major…
Descriptors: Construct Validity, Educational Research, Elementary Secondary Education, Foreign Countries
