Woodcock-Johnson Tests of Cognitive Ability

The Woodcock-Johnson test battery is a comprehensive assessment tool measuring general intellectual ability, specific cognitive abilities, scholastic aptitude, oral language, and academic achievement across the age range 2 to 90+ years. It provides extended grade norms from kindergarten to university graduate students

It was developed by Richard W. Woodcock, Kevin S. McGrew, and Nancy Mather it offers Two distinct, co-normed batteries:
 * Achievement battery has seven additional tests and eight additional clusters; *Cognitive battery has eight additional tests and five additional clusters

Each individual test takes about about 5 minutes so the Cognitive Standard 7 tests take about 35–45 minutes and the Achievement Standard 11 tests 55–65 minutes. Administration protocols include three intra-individual procedures and three ability/achievement procedures

Scoring software eliminates hand-scoring. The WJ III Compuscore® and Profiles Program and Report Writer facilitating the process..

It is one of the few cognitive tests to offer a calculated “g” score as General Intellectual Ability (GIA), rather than arithmetic mean score. Expanded Broad Achievement clusters contain 3 tests measuring basic skills, fluency, and application The broader cognitive factor scores measure narrow aspects of each broad ability. Other benefits are
 * Tests of Achievement match all seven areas of IDEA legislation
 * Oral language tests included in the Achievement battery