Colorado reading project: Longitudinal analyses

Extensive psychometric test data were obtained from two independent samples of reading-disabled and control children: 70 probands and 75 controls tested on two occasions over an average interval of 4.2 years, and 35 probands and 22 controls tested on three occasions over an average interval of 8.6 years. When composite measures of reading performance and symbol-processing speed were subjected to mixed-model multivariate analyses of variance, significant effects due to group (reading-disabled versus control) and time (i.e., test session) were obtained in both samples, and a significant group-by-time interaction was obtained for the sample tested on three occasions. In general, rates of change in reading performance are highly similar for reading-disabled and control children. However, with regard to symbol-processing speed, differences between the two groups increase as a function of age. Although no evidence was obtained for differential longitudinal stability of either composite measure in reading-disabled and control children, results of a multiple regression analysis suggest that reading deficits during middle childhood are highly predictive of later reading problems, even into early adulthood. This work was supported in part by a program project grant from the NICHD (HD-11681). The invaluable contributions of staff members of the many Colorado school districts and of the families who participated in the study are gratefully acknowledged.     

Colorado longitudinal twin study of reading disability

The primary objectives of the present study are to introduce the Colorado Longitudinal Twin Study of Reading Disability, the first longitudinal twin study in which subjects have been specifically selected for having a history of reading difficulties, and to present some initial assessments of the stability of reading performance and cognitive abilities in this sample. Preliminary examination of the test scores of 124 twins with a history of reading difficulties and 154 twins with no history of reading difficulties indicates that over the 5- to 6-year interval between assessments, cognitive and reading performance are highly stable. As a group, those subjects with a history of reading difficulties had substantial deficits relative to control subjects on all measures at initial assessment, and significant deficits remained at follow-up. The stability noted for all cognitive and achievement measures was highest for a composite measure of reading, whose average stability correlation across groups was 0.80. Results of preliminary behavior genetic analyses for this measure indicated that shared genetic influences accounted for 86% and 49% of the phenotypic correlations between the two assessments for twin pairs with and without reading difficulties, respectively. In addition, genetic correlations reached unity for both groups, suggesting that the same genetic influences are manifested at both time points.     

Longitudinal twin study of early reading development in three countries: Preliminary results

We have initiated parallel longitudinal studies in Australia (Byrne, PI), the United States (Olson, PI), and Norway (Samuelsson, PI) of identical and fraternal twins who are being tested in preschool for prereading skills, and in kindergarten, first grade, and second grade for the development of early reading, spelling, and related cognitive skills. Comparisons of the similarities of identical and fraternal twins will reveal the relative influence of genetic, shared family environment, and nonshared environment on individual differences at and across different stages of development. Family and twin-specific environmental information is also being directly assessed through parent questionnaires and observations by testers. Most of the data collected so far have been from preschool twins (146 in Australia, 284 in the United States, and 70 in Norway). Preliminary analyses for the preschool cognitive measures showed reliable genetic influences on phonological awareness and several measures of memory and learning. In contrast, vocabulary, grammar, and morphology showed significant shared environment and negligible genetic effects. A print knowledge composite showed both genetic and shared environment influence.     

Detouring school to family: A reading of Antigone

Abstract

Sophocles’ Antigone is a play that has been analyzed by many researchers in different fields, but the subject of Antigone’s parenting has been neglected in the field of education. Antigone’s parenting determines her action of burying her brother, for which she pays a high price because she has defied the polis rules. The will of the polis can be viewed as reflected in schools in modern society. Inspired by the thoughts of Hegel, Lacan, and Paul Ric?ur, this study proposes that for children, the school is a detour to family that continually prompts them to rethink their family, thus helping them obtain self-comprehension.     

Longitudinal prediction and prevention of early reading difficulty

The results of many studies suggest that early reading problems are associated with deficiencies in certain spoken language skills. Children who encounter reading difficulty tend to be deficient in the perception of spoken words, the ability to retain linguistic material in temporary memory, and the ability to comprehend certain spoken sentences, as well as in their awareness about the phonological structure of spoken words. This paper summarizes these findings and provides an explanation in terms of the requirements of skilled reading. It further reviews the results of two longitudinal studies which show that inferior performance in kindergarten tests of language skills may presage future reading problems in the first grade. Based on these studies, procedures are suggested for kindergarten screening and for some ways of aiding children who, by virtue of inferior performance on the screening tests, might be considered at risk for early reading difficulties. Presented at the 33rd Annual Conference of The Orton Dyslexia Society, San Diego, California, November 1983. This paper was prepared while the author was a Fulbright Fellow at the Research Institute of Logopedics and Phoniatrics at the University of Tokyo, Tokyo, Japan. Much of the research herein described was supported by NICHD Grant HD-01994 and BRS Grant 05596 to Haskins Laboratories, Inc.     

Longitudinal effects of RtI implementation on reading achievement outcomes

Because several studies have investigated student outcomes in schools implementing Response to Intervention (RtI), relatively little research has investigated the impact of implementation on students’ long‐term achievement outcomes (i.e., several years after exposure). The purpose of this study was to describe one elementary school's RtI implementation process and to examine students’ long‐term reading comprehension outcomes following their exposure to various phases of implementation. Four cohorts of students who experienced different implementation phases (i.e., a baseline condition or Phases I, II, or III of implementation) during Grade 2 were subsequently followed across Grades 3, 4, and 5 to examine their outcomes on two reading comprehension measures. Results indicated that students who experienced the early phases of RtI implementation (i.e., Phases I and II) during Grade 2 generally had higher mean comprehension scores in Grades 4 and 5 than students in the baseline condition. Implications for practice and future research are discussed.     

Longitudinal correlates of reading comprehension difficulties in Chinese children

The present study explored the early predictors of reading comprehension difficulties in Chinese children. We originally recruited 290 Beijing and 154 Hong Kong children and further selected from each sample those (30 from Beijing and 22 from Hong Kong sample) in the lowest 25 % on reading comprehension tests across the last two consecutive testing years (Beijing: ages 9 and 10; Hong Kong: ages 8 and 9) as poor comprehenders. These groups were matched to a group of children from the same sample whose reading comprehension was above 30 % across the two final years and matched on mothers’ education levels, age, nonverbal reasoning at age 4, and Chinese word reading across the same final two consecutive years. We then examined early linguistic/cognitive skills at ages 5–9 that could distinguish the poor and typically developing groups in each city separately. Compared to the control group, poor comprehenders from both samples performed significantly and consistently worse on word reading at early ages, and generally worse on morphological compounding awareness, phonological awareness, and vocabulary knowledge from ages 6 and onwards. In addition, lexical tone sensitivity across ages and grammatical sensitivity (administered at age 5 only) failed to distinguish the two groups for the Beijing sample but did for Hong Kong children.     

Family Influences on the Formation of Moral Identity in Adolescence: Longitudinal analyses

A model of moral identity formation is presented. According to the model, family influences have a direct effect on moral identity development in adolescence, independent of the effects of personality, income and other factors. The model is tested using longitudinal data from the National Longitudinal Survey of Youth (Child Sample), which is constituted of the children born to a representative sample of American women who were between the ages of 14 and 21 in 1979. In general, the results provide support for the model. Cognitively and socially rich family environments, combined with high levels of parent-adolescent joint activity, were found to facilitate voluntary participation in community service, a marker of moral identity formation. The implications of these findings for parenting, moral education and future research are discussed.     

Influences of family based prerequisites,reading attitude,and self-regulation on reading ability

This study investigated the effect of self-regulated learning, as indicated by academic self-concept, motivation and learning strategies, reading attitude and family based prerequisites on reading ability. Students (n = 4018) in the eighth grade answered the IEA reading literacy test, the self-regulated learning questionnaire and a student questionnaire about their background. The exploratory factor analysis (EFA) revealed that the self-regulated learning questionnaire did not measure the intended three dimensions, but only two: Verbal/General academic self-concept and a new dimension called Goal oriented strategies. Structural Equation Modelling (SEM) with a cross-validation sample was conducted to determine the effects in the final model. The strongest effect on reading ability was from Verbal/General academic self-concept (β = .43 for final and β = .56 for cross-validation model). Gender differences revealed that girls read better on narrative and expository texts, had a more positive reading attitude, and more positive verbal self-concept, whereas boys had a higher academic self-concept (not domain-specific), self-efficacy, control expectation, reported more memorising, elaboration, and instrumental motivation (all differences p < .001).     

The impact of a collaborative family/school reading programme on student reading rate

Student reading skills are below grade level in many schools and professionals are constantly searching for new ideas to enhance reading curricula. To address this problem in one elementary school, a parent/school reading programme was implemented. Parents were encouraged to increase the amount of time spent reading with their children at home and the school provided easily accessible reading materials, suggestions for encouraging reading at home, prizes and special activities. Programme participants demonstrated a higher increase in reading rate and accuracy than the matched peers. Prior to implementation and at the end of the reading programme, parents and students who chose to participate in the programme reported positive attitudes toward reading together. Implications of these results are discussed and an emphasis is placed on expanding research in the area.     

Retrospective analyses of the reading development of grade 4 students with reading disabilities: risk status and profiles over 5 years

This study presents a longitudinal examination of the development of reading and reading-related skills of 22 Grade 4 children identified as having reading disabilities (RD) who had been followed since kindergarten. The analyses were conducted to investigate the patterns of emergence of RD as well as reading ability and risk status across the 5 years. The findings of the study are presented with an examination of the trajectories of the children with RD as compared to Grade 4 typical readers (matched for grade, gender, language status, and school) with a similar profile on literacy skills in kindergarten. The results demonstrate the heterogeneous nature of the trajectory of RD in school-age children; although many of the children with RD were at risk in kindergarten, there was a subsample who did not demonstrate reading and phonological difficulties until the third and fourth grades.     

Genetic etiology of spelling deficits in the Colorado and London twin studies of reading disability

The basic multiple regression model for the analysis of selected twin data (DeFries and Fulker 1985, 1988) was fitted to spelling data from 100 pairs of MZ twins and 71 pairs of same-sex DZ twins tested in the Colorado Reading Project (DeFries, Olson, Pennington and Smith 1991), and to data from 12 pairs of MZ twins and 15 pairs of same-sex DZ twins tested in the London twin study of reading disability (Stevenson, Graham, Fredman and McLoughlin 1984, 1987). Estimates of h _g ² obtained from analyses of these data suggest that about 60% of the deficit of probands is due to heritable influences in both samples. When a regression model was fitted separately to data from males and females in the combined Colorado and London samples, resulting estimates of h _g ² were 0.66±0.18 and 0.56±0.19, respectively, a nonsignificant difference. Collaborative analyses of data from additional twin studies of reading disability would facilitate more rigorous tests of hypotheses of differential genetic etiology as a function of group membership.     

Longitudinal predictors of reading and spelling across languages varying in orthographic consistency

We examined the longitudinal predictors of nonword decoding, reading fluency, and spelling in three languages that vary in orthographic depth: Finnish, Greek, and English. Eighty-two English-speaking, 70 Greek, and 88 Finnish children were followed from the age of 5.5 years old until Grade 2. Prior to any reading instruction, they were administered measures of phonological awareness, letter knowledge, and rapid naming speed. In Grade 2, they were administered measures of nonword decoding, text-reading fluency, and spelling. The results showed that the model for nonword decoding in Greek was similar to that of Finnish (both have consistent grapheme-to-phoneme mappings) while the model for spelling in Greek was similar to that of English (both have some inconsistent phoneme-to-grapheme mappings). In addition, the models for nonword decoding and spelling in Finnish were similar, because Finnish is consistent in both directions. Letter knowledge dominated the prediction in each language. The predictable role of orthographic consistency on literacy acquisition is discussed.     

Predicting word reading ability: a quantile regression study

Predictors of early word reading are well established. However, it is unclear if these predictors hold for readers across a range of word reading abilities. This study used quantile regression to investigate predictive relationships at different points in the distribution of word reading. Quantile regression analyses used preschool and kindergarten measures of letter knowledge, phonological awareness, rapid automatised naming, sentence repetition, vocabulary and mother's education to predict first‐grade word reading. Predictors generally varied in significance across levels of word reading. Notably, rapid automatised naming was a significant unique predictor for average and good readers but not poor readers. Letter knowledge was generally a stronger unique predictor for poor and average readers than good readers. Well‐known word reading predictors varied in significance at different points along the word reading distribution. Results have implications for early identification and statistical analyses of reading‐related outcomes. What is already known about this topic

• Early predictors of word reading are well established, with letter knowledge, phonological awareness and rapid automatised naming identified as key predictors.
• These relationships are primarily investigated in average readers, or in groups of good and poor readers separated by an arbitrary cut‐off score.

What this paper adds

• In this study, we used quantile regression to determine significant predictors of word reading across a range of word reading abilities.
• The quantile regression approach avoids the loss of power that can arise when creating subgroups and has none of the issues associated with the use of a single, arbitrary cut-off score to separate good and poor readers.
• Letter knowledge and phonological awareness were significantly predictive of word reading across the distribution of word reading abilities, whereas rapid automatised naming was significant only for good readers, and sentence recall was significant only for poor readers.

Implications for theory, policy and practice

• Results reinforce the usefulness of measures such as letter knowledge, phonological awareness and sentence repetition in the early identification of children at risk for reading disabilities.
• Results also suggest that measures of rapid naming may add little unique information in differentiating between children who subsequently read in the below‐average range.

     

Early reading development in children at family risk for dyslexia

In a 3-year longitudinal study, middle- to upper-middle-class preschool children at high family risk (HR group, N = 67) and low family risk (LR group, N = 57) for dyslexia (or reading disability, RD), were evaluated yearly from before kindergarten to the end of second grade. Both phonological processing and literacy skills were tested at each of four time points. Consistent with the well-known familiarity of RD, 34% of the HR group compared with 6% of the LR group became RD. Participants who became RD showed deficits in both implicit and explicit phonological processing skills at all four time points, clearly indicating a broader phonological deficit than is often found at older ages. The predictors of literacy skill did not vary by risk group. Both risk groups underwent a similar developmental shift from letter-name knowledge to phoneme awareness as the main predictor of later literacy skill. This shift, however, occurred 2 years later in the HR group. Familial risk was continuous rather than discrete because HR children who did not become RD performed worse than LR non-RD children on some phonological and literacy measures. Finally, later RD could be predicted with moderate accuracy at age 5 years, with the strongest predictor being letter-name knowledge.     

School-based family socialization and reading achievement in the inner city

Reading comprehension test scores of 826 black, inner-city children in 41 classes, grades one through six, were regressed on scores on comparable tests taken one year earlier, on several other control variables, and on the amount of exposure to a program intended to help parents create conditions in the home to stimulate academic achievement. Two variables (prior reading-comprehension scores and program intensity), accounted for nearly all the reliable variance in the posttest scores in analyses carried out with individuals and class medians as the units. Students and classroom groups intensively exposed to the program gained .5 to .6 grade equivalents more than those less intensively exposed during the year.