Hollis S. Scarborough

Prediction of Reading Comprehension: Relative Contributions of Word Recognition, Language Proficiency, and Other Cognitive Skills Can Depend on How Comprehension Is Measured.

Reading comprehension scores from the Wechsler Individual Achievement Tests, the Gates-MacGinitie Reading Test, and the Gray Oral Reading Test were examined in relation to measures of reading, language, and other cognitive skills that have been hypothesized to contribute to comprehension and account for comprehension differences. In a sample of 97 first through tenth graders, the relative contributions of word recognition/decoding and oral language skills to comprehension varied from test to test. The inclusion of reading speed accounted for additional variance, but prediction of comprehension scores was minimally improved by including measures of rapid serial naming, verbal memory, IQ, or attention. The findings suggest that commonly used tests of reading comprehension, such as the three we compared, may not tap the same array of cognitive processes. Implications for research and practice are discussed.

Index of Productive Syntax.

A new method for evaluating the grammatical complexity of preschool natural language corpora is introduced. In the Index of Productive Syntax, occurrences of 56 syntactic and morphological forms are counted, yielding a total score and subscores for noun phrases, verb phrases, questions/negations, and sentence structures. Development of the index and analyses of its reliability and age-sensitivity when applied to language samples of 2- to 4-year-olds are described. Some advantages and limitations of the index as a research and clinical instrument are also discussed.

Late-Emerging Reading Disabilities.

Literacy, language, and cognitive skills were compared for 35 4th5th graders with early-identified reading disabilities (RD), 31 with late-identified RD (first seen after 3rd grade), and 95 normally achieving students. Late-identified reading deficits were heterogeneous; some children were weak in both comprehension and word-level processing, whereas others had deficiencies in 1 component of reading but were unimpaired in the other. Although most reading skill deficits were about as severe for late- as for early-identified RD, and profiles of associated characteristics were similar, few of the former had yet been identified by their schools. Third-grade achievement, retrospectively examined, had been higher for the group with late-identified RD, suggesting that their reading difficulties were not just late identified but actually late emerging. A great deal of knowledge and understanding about children’s reading disabilities has been amassed over the past few decades. The focus of most research has been early-emerging difficulties that are identified prior to the fourth grade. As noted by Chall (1983), however, there also occurs a smaller “second wave” of students who appear to undergo a “fourth-grade slump” in reading achievement. There has been almost no investigation of the nature and severity of these less typical reading disabilities (RD) that emerge after the primary grades. In this study, we compared the reading and spelling abilities and literacy-related skills of children with early- versus late-emerging RD. In practice, during the elementary and middle school years, there is typically an increasing emphasis on reading comprehension in curricula, instruction, and assessments (Anderson, Hiebert,

Predicting, Explaining, and Preventing Children's Reading Difficulties

Several decades of research have made it clear that by the time children enter school they already vary widely in their reading-related knowledge and skills. How well do these differences predict differences in reading acquisition? What can they tell us about the causes of reading disabilities? How might these research findings be used to reduce the number of children who have difficulty learning to read? Answers to such questions are fundamental for designing early interventions for children at risk. In this paper, we summarize what has been learned so far, and discuss what directions need to be taken in future research so as to provide fuller answers.

The Relation of Utterance Length to Grammatical Complexity in Normal and Language-Disordered Groups.

Mean length of utterance (MLU) in morphemes was examined as a predictor of the grammatical complexity of natural language corpora of normal preschoolers and of children and adolescents with delayed language, Fragile X syndrome, Down syndrome, and autism. The Index of Productive Syntax (IPSyn) served as the measure of syntactic and morphological proficiency. For all groups, a strong curvilinear association between measures was found across the MLU range from 1.0 to about 4.5. Correlations were weaker when MLU exceeded 3.0 than during earlier stages of language development, however, confirming previous suggestions that MLU becomes less closely associated with grammatical development as linguistic proficiency increases. For the language-disordered groups, moreover, the curves relating the two measures differed from the curves for the normal preschoolers because MLU frequently overestimated actual IPSyn scores. The results are discussed with respect to the use of MLU in conjunction with other measures of syntactic complexity in the study of atypical language development.

Early syntactic development of dyslexic children

The syntactic development of preschoolers who later became disabled readers was compared to that of children who were similar to the dyslexics in sex, socioeconomic status, and IQ, but who became normal readers. Expressive and receptive syntactic abilities were examined longitudinally from age 30 to 60 months. The dyslexic group was poorer than the control group on all measures until the age of five, at which time both groups exhibited similar syntactic proficiency. The etiological relation of language development to reading disabilities is discussed.

Antecedents to Reading Disability: Preschool Language Development and Literacy Experiences of Children from Dyslexic Families

In a longitudinal study of the relation between preschool development and later reading abilities, children with dyslexic parents and/or older siblings were compared to children with no family incidence of dyslexia. Many children from dyslexic families developed reading problems by the end of the second grade, and these poor readers were characterized chiefly by weaker early syntactic and phonological skills and by less frequent exposure to books during their preschool years than the preschoolers who became normal readers. Some implications of the results for etiological theories of dyslexia are discussed.

Relationships Among Reading Skills of Adults With Low Literacy

In this study, confirmatory factor analyses were used to examine the interrelationships among latent factors of the simple view model of reading comprehension (word recognition and language comprehension) and hypothesized additional factors (vocabulary and reading fluency) in a sample of 476 adult learners with low literacy levels. The results provided evidence for reliable distinctions between word recognition, fluency, language comprehension, and vocabulary skills as components of reading. Even so, the data did not support the hypothesis that the simple view needs to be expanded to include vocabulary or fluency factors, as has been posited in a few prior studies of younger and more able readers. Rather, word recognition and language comprehension alone were found to account adequately for variation in reading comprehension in adults with low literacy.

What Speech-Language Pathologists Need To Know about Early Reading.

The National Research Council report, Preventing Reading Difficulties in Young Children, reviews research on early reading and recommends prevention strategies and optimal interventions for reading difficulties. Since speech-language pathologists often treat children whose language problems co-occur

Relative Effectiveness of Reading Intervention Programs for Adults with Low Literacy.

Abstract To compare the efficacy of instructional programs for adult learners with basic reading skills below the 7th-grade level, 300 adults were randomly assigned to 1 of 3 supplementary tutoring programs designed to strengthen decoding and fluency skills, and gains were examined for the 148 adult students who completed the program. The 3 intervention programs were based on or adapted from instructional programs that have been shown to benefit children with reading levels similar to those of the adult sample. Each program varied in its relative emphasis on basic decoding versus reading fluency instruction. A repeated measures multivariate analysis of variance confirmed small to moderate reading gains from pre- to posttesting across a battery of targeted reading measures but no significant relative differences across interventions. An additional 152 participants who failed to complete the intervention differed initially from those who persisted. Implications for future research and adult literacy instruction are discussed.