APA Dictionary of Psychology

an individual test designed to yield a broad index of intelligence. Updated in 2007 as DAS–II, it now comprises 20 cognitive subtests divided into two age-based batteries: the Early Years Cognitive Battery and the School-Age Cognitive Battery. Each battery is further divided into core and diagnostic subtests. The core subtests are good measures of g (see general factor), whereas the diagnostic subtests measure such abilities as short-term memory and processing speed. Six of the core subtests at the school-age level yield separate scores for verbal ability, nonverbal reasoning, and spatial ability. [developed in 1990 by British psychologist Colin D. Elliott (1937–  )]