since the scale purports to measure intelligence individuals aged 2 years through adult,all items in any given test will not be appropriate for all subjects in administering the modern binet , then,one must determine where to begin each specific test . one does this by using the subject's individual score on the vocabulary test in conjunction with her or his chronological age. in this way the test format is adaptive: each individual is tested with a range of tasks best suited to his or her ability (r.l.) thorndike, hagen ,satter,1986