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Introduction to Classical and Modern Test Theory Linda Crocker, James Algina
Publisher: Wadsworth Pub Co

The concept of parallel tests is also commonly invoked as part of classical measurement theory. In this context, a true score represents “the average score a person would obtain on an infinite number of parallel forms of a test, assuming that the person is not affected by taking the tests (i.e., assuming no practice or .. The Ocular Surface Disease Index (OSDI) is perhaps the most frequently used survey instrument for the assessment of ocular surface disease severity in dry eye research. Crocker L, Algina J: Introduction to Classical and Modern Test Theory. New York: Holt Rinehart & Winston. New-York: Harcourt, Brace, Jovanich College Publishers; 1986. Organizational Research Methods, 4, 361-375. The 1991 revision of the Wechsler Intelligence Scale for Children (WISC-III) resulted in the addition of an optional subtest - Symbol Search. Lord FM: Applications of Item Response Theory to Practical Testing Problems. New York: Holt, Rinehart and Winston. Single item reliability: A replication and extension. Introduction to classical and modern test theory.