<P> Robert Thorndike was asked to take over after Merrill's retirement . With the help of Elizabeth Hagen and Jerome Sattler, Thorndike produced the fourth edition of the Stanford--Binet Intelligence Scale in 1986 . This edition covers the ages two through twenty - three and has some considerable changes compared to its predecessors (Graham & Naglieri, 2003). This edition was the first to use the fifteen subtests with point scales in place of using the previous age scale format . In an attempt to broaden cognitive ability, the subtests were grouped and resulted in four area scores, which improved flexibility for administration and interpretation (Youngstrom, Glutting, & Watkins, 2003). The fourth edition is known for assessing children that may be referred for gifted programs . This edition includes a broad range of abilities which provides more challenging items for those in their early adolescent years, whereas other intelligence tests of the time did not provide difficult enough items for the older children (Laurent, Swerdlik, & Ryburn, 1992). </P> <P> Gale Roid published the most recent edition of the Stanford--Binet Intelligence Scale . Roid attended Harvard University where he was a research assistant to David McClelland . McClelland is well known for his studies on the need for achievement . While the fifth edition incorporates some of the classical traditions of these scales, there were several significant changes made . </P> <Ul> <Li> April 1905: Development of Binet - Simon Test announced at a conference in Rome </Li> <Li> June 1905: Binet - Simon Intelligence Test introduced </Li> <Li> 1908 and 1911: New Versions of Binet - Simon Intelligence Test </Li> <Li> 1916: Stanford--Binet First Edition by Terman </Li> <Li> 1937: Second Edition by Terman and Merrill </Li> <Li> 1973: Third Edition by Merrill </Li> <Li> 1986: Fourth Edition by Thorndike, Hagen, and Sattler </Li> <Li> 2003: Fifth Edition by Roid </Li> </Ul> <Li> April 1905: Development of Binet - Simon Test announced at a conference in Rome </Li>

The stanford binet and the wechsler intelligence tests