“…Their approach grows out of the movement towards behavioral psychology in special education and employs task analysis and criterion-referenced measurement. The behavioral movement seems to result from a growing disenchantment with earlier perceptual-training approaches (Barsch, 1967;Frostig & Horne, 1964;Kephart, 1960) and research's failure to support their validity (Hammill, 1972;Mann, 1970).. , , Although it is not possible to differentiate between the learningdisabled and culturally disadvantaged with much accuracy on the basis of psychometric instruments, and although differential programming may not be appropriate at this time, attempts at differential diagnosis may still be valuable. It is possible that future research may turn up ways of making a more accurate diagnosis and may possibly provide remedial methods which are differentially effective for the two groups.…”