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Vaughn, Sharon; Capin, Philip; Scammacca, Nancy; Roberts, Greg; Cirino, Paul; Fletcher, Jack M. – Journal of Learning Disabilities, 2020
This study examines the initial word reading performance of fourth-grade struggling readers and the extent to which differing levels of word reading performance at pretest influenced their response to reading interventions. A large group of students with significant reading comprehension difficulties (N = 481) were classified into three clusters…
Descriptors: Response to Intervention, Predictor Variables, Reading Comprehension, Reading Difficulties
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Vaughn, Sharon; Roberts, Greg; Capin, Philip; Miciak, Jeremy; Cho, Eunsoo; Fletcher, Jack M. – Exceptional Children, 2019
This study examined how differences in listening comprehension and word reading at the beginning of the school year influence changes in reading comprehension for English learners (ELs) with significant reading difficulties compared to non-ELs with significant reading difficulties. The study investigated heterogeneity in response to instruction…
Descriptors: Reading Skills, Vocabulary Development, Language Skills, Reading Comprehension
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Miciak, Jeremy; Taylor, W. Pat; Stuebing, Karla K.; Fletcher, Jack M.; Vaughn, Sharon – Journal of Research on Educational Effectiveness, 2016
An appropriate estimate of statistical power is critical for the design of intervention studies. Although the inclusion of a pretest covariate in the test of the primary outcome can increase statistical power, samples selected on the basis of pretest performance may demonstrate range restriction on the selection measure and other correlated…
Descriptors: Educational Research, Research Design, Intervention, Statistical Analysis
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Vaughn, Sharon; Solís, Michael; Miciak, Jeremy; Taylor, W. Pat; Fletcher, Jack M. – Journal of Research on Educational Effectiveness, 2016
This study examined the effectiveness of a researcher-provided intervention with fourth graders with significant reading difficulties. The intervention emphasized multisyllable word reading, fluent reading of high-frequency words and phrases, vocabulary, and comprehension. To identify the participants, 1,695 fourth-grade students were screened…
Descriptors: Comparative Analysis, Reading Difficulties, Intervention, Outcomes of Treatment
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Miciak, Jeremy; Williams, Jacob L.; Taylor, W. Pat; Cirino, Paul T.; Fletcher, Jack M.; Vaughn, Sharon – Journal of Educational Psychology, 2016
No previous empirical study has investigated whether the learning disabilities (LD) identification decisions of proposed methods to operationalize processing strengths and weaknesses approaches for LD identification are associated with differential treatment response. We investigated whether the identification decisions of the…
Descriptors: Learning Disabilities, Disability Identification, Predictor Variables, Intervention