A series of computer simulations was run to measure the relationship between testlet validity and the factors of item pool size and testlet length for both adaptive and linearly constructed testlets. Results confirmed the generality of earlier empirical findings of H. Wainer and others (1991) that making a testlet adaptive yields only marginal…

The objectives of this investigation are to develop, describe, assess, and demonstrate procedures for constructing mastery tests to minimize errors of classification and to maximize decision reliability. The guidelines are based on conditions where item exchangeability is a reasonable assumption and the test constructor can control the number of…

This guide presents ratings of assessment instruments for use by speech-language pathologists with preschool students. Tests are reviewed in alphabetical order on forms filled out by practicing speech-language pathologists, including data on speech components covered by each test, age range, factors of norms where norms are used, reliability,…