In order to investigate the relation between reading accuracy and spee
ch processing, 20 children, from grades 2 and 3 who were skilled in re
ading were compared with 20 less skilled readers on a speech perceptio
n and production task. The two groups of readers were indistinguishabl
e in their production of the two-syllable words dippy, deepy, tippy, a
nd teepy and in their perception of the stop consonants /d/ versus /t/
. Less skilled readers were significantly less accurate than the skill
ed readers in a vowel identification task involving the lax and tense
high vowels /I/ and /i/. The error pattern for vowel identification wa
s similar across groups, with both groups making fewer errors when sho
rt and longer segments were alternated. The results imply that vowel p
honemes are less securely represented in the perceptual system of less
skilled readers than are consonant phonemes. In addition, the results
raise the possibility that a selective perceptual impairment underlie
s at least some of the phonemic awareness problems that have been asso
ciated with poor reading.