Sentential structure and the perceptual spans of two samples of disabled readers.

The constructs of accuracy and speed were adopted as performance criteria against which to define two clinical samples of disabled readers. Accuracy-disabled subjects had failed to achieve reliable age-appropriate word recognition skills. Rate-disabled readers were age-appropriate in word recognition accuracy but deficient on measures of contextual accuracy and reading speed. When their eye-voice spans were measured under different text manipulations, accuracy-disabled and rate-disabled children differed in the magnitude of their perceptual spans during the act of reading. The two samples did not differ in the extent to which they availed themselves of contextual constraints to extend their spans in the reading of connected text. Both samples of disabled readers appeared able to use syntactic information as an independent source of sentential information in reading, even the sample whose reading disability was associated with oral syntax deficits. Comparisons with a previous sample of normal beginning readers suggested both types of disabled readers to be reading with perceptual spans of reduced dimensions.