One-hundred and eighty randomly selected elementary school students, stratified to include an equal number of boys and girls at each of the six levels and each scoring within 1 SD for the total IQ Mental Maturity, were tested to gain an estimate of the reliability of the three constructed tests (in the areas of auditory memory, visual and auditory-visual integration [AVI]). Findings of the study highlighted the value of mental age as a predictor of reading achievement. Mental age was found to be (1) linearly related to AVI and (2) a predictor of reading achievement whose efficiency is not increased considerably by the addition of selected auditory factors.One of the problems in education that continues to defy solution is the large number of children who experience extreme difficulty in learning to read. After countless numbers of new approaches to reading instruction have been proposed and tested, no evidence has been produced to indicate that any instructional method or technique will eliminate the large percentage of youngsters who yearly become reading failures.Another facet of research into reading disabilities has concentrated on identifying the sub-abilities required to translate printed symbols into meaningful understanding. This research is based on the premise that there are basic perceptual abilities required for a child to master the decoding aspects of reading and that these abilities can be both measured and trained.Typical procedure has consisted of designing instruments to measure hypothesized constructs, testing groups of disabled and normal readers with these instruments, and recommending training activities that closely parallel the tests administered when the disabled reader groups show deficiencies in the measured ability. The fact that such tests and training are of questionable validity has not slowed the rush of educators and others, in establishing perceptual training classes.Among the abilities that have been identified as sub-abilities in reading are auditory memory, auditory discrimination, auditory blending, visual memory, and a host of visual-perceptual and visualmotor abilities.