The WJ IV is a theoretical, structural, and interpretive revision of the WoodcockJohnson III (WJ III®) (Woodcock, McGrew, & Mather, 2001) designed to provide measures of general intellectual ability; broad and narrow cognitive abilities as defined by contemporary Cattell-Horn-Carroll (CHC) theory, (Schneider & McGrew, 2012) including oral language, reading, mathematics, writing, and academic domain-specific aptitudes; and academic knowledge. The following WJ IV revision goals and design objectives maintain the traditional Woodcock-Johnson focus on quality, while advancing CHC theory from its initial articulation in the Woodcock-Johnson Psycho-Educational Battery–Revised (WJ-R®) (Woodcock & Johnson, 1989) and WJ III in ways that provide more administration and interpretive options to meet contemporary assessment needs. (author abstract)