The strong differences in manifestation, prevalence, and incidence in dyslexia across languages invite studies in specific writing systems. In particular, the question of the role played by emergent literacy in opaque and transparent writing systems remains a fraught one. This research project tested, through a 4-year prospective cohort study, an…

This meta-analysis synthesizes the literature on interventions for struggling readers in Grades 4 through 12 published between 1980 and 2011. It updates Scammacca et al.'s analysis of studies published between 1980 and 2004. The combined corpus of 82 study-wise effect sizes was meta-analyzed to determine (a) the overall effectiveness of reading…

A randomized experimental design with three levels of intervention was used to compare the effects of beginning reading interventions on early phonemic, decoding, and spelling outcomes of 96 kindergartners identified as at risk for reading difficulty. The three instructional interventions varied systematically along two dimensions--time and design…

A pre-post experimental design with 6-week delayed posttest was implemented to investigate the effects of reading comprehension strategy (RCS) instruction with and without attribution retraining (AR) on reading outcomes for seventh, eighth, and ninth graders with learning and other mild disabilities. Students were randomly assigned to one of three…

Research articles (n=174) published in the "Journal of Learning Disabilities" from 1989 through 1993 were analyzed and coded by type of research design and statistical technique used. Eighty percent of the research designs were nonintervention methods; 55% of all statistical techniques were coded as primary, 32% were intermediate, and…

Arguments are presented suggesting that single-subject research designs can form a basis for establishing a working relationship between researchers and clinicians in the field of learning disabilities. (Author/PHR)

Discussion of conceptual and methodological aspects of reading intervention research focuses on nine specific design limitations of previous intervention research; ways to measure and analyze change as a function of development, treatment intervention and ecological influences; assumptions of individual growth models; and advantages, conditions,…

Examination of methodological issues in the design and interpretation of studies on the genetics of reading disability suggests three tests of increasing rigor for determining whether reading score distributions are categorical and thus not subject to analyses which assume a continuous normal distribution. Also noted are interactive relationships…

The importance and relevance of longitudinal research in learning disabilities is addressed, including its value in verification of appropriate hypotheses concerning particular developmental patterns and debunking of misconceptions. Examples from various longitudinal studies are given. (DB)

The author replies to responses to her article, "The Newtonian Mechanistic Paradigm, Special Education, and Contours of Alternatives" (EC 220 916). Topics covered include the degree of objectivity versus the idea of objectivity, theory-data separation versus theory-laden data, Piagetian theory and the question of theory versus paradigm,…

Synthesizes information from a 1995 international symposium on longitudinal research in learning disabilities. Discussion of generic considerations of longitudinal research is followed by examination of issues specific to learning disabilities including definition, attrition, composition of research teams, ethical concerns, data collection, and…

Issues are raised about the Council for Learning Disabilities Research Committee's standards for describing research subjects, including justification for the recommended standards, relationship between description of subjects and probability of replication, and impact of the type of research on subject description standards. Recommendations are…

This introduction to a series of articles on the scaffolding metaphor in learning disabilities research introduces each article and raises two main concerns: the lack of careful delineation of how scaffolding becomes operational in research studies and constraints in the use of scaffolding arising from communication problems. (DB)

A review of 208 studies of children with learning disabilities (LD) published in 10 major journals between 1988 and 1990 examined the extent to which recommendations concerning research design and reporting made in 1980 and 1984 have been implemented. The review found continuing problems, including imprecise subject descriptions, heterogeneous…

Two methodological problems often arising in dyslexia research are considered. The first problem concerns the validity of experimental measures and the related problem of interpreting null results. The second problem involves the effects of sampling from a disabled population if the disorder under investigation has multiple unknown origins.…