The Wechsler Individual Achievement Test assesses achievement in students in grades K-12, with subtests in reading, mathematics reasoning, spelling, reading comprehension, numerical operations, listening comprehension, oral expression, and written expression. The test was developed to assist in identification of students with learning…

Discusses changes in testing as a result of the availability of extensive inexpensive computing and some recent developments in statistical test theory. Describes the role of the Computerized Adaptive Test (CAT) and modern Item Response Theory (IRT) in ability testing tailored to each student's knowledge and ability. (JAC)

Computer adaptive testing systems are feasible for certification and licensure testing. This is in part due to the availability of extensive yet inexpensive computers. Modern item response theory, combined with computerized adaptive testing, yields a powerful new method of testing which provides greater accuracy and efficiency and less boredom for…