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Kim, James S.; Relyea, Jackie Eunjung; Burkhauser, Mary A.; Scherer, Ethan; Rich, Patrick – Educational Psychology Review, 2021
This experimental study aimed to replicate and extend a previous efficacy study of an elementary grade content literacy intervention that demonstrated positive effects on students' vocabulary knowledge depth, argumentative writing, and reading comprehension. Using a cluster (school) randomized trial design, this replication experiment was…
Descriptors: Elementary School Students, Vocabulary Development, Persuasive Discourse, Writing (Composition)
Kim, James S.; Guryan, Jonathan – Society for Research on Educational Effectiveness, 2011
There are several goals guiding this study. First, the authors use an experimental design to examine the causal effects of giving children 10 self-selected books over two summers. Second, they examine whether treatment effects are moderated by children's family income (i.e., eligibility for free- and reduced-price lunch). As a result, they examine…
Descriptors: Reading Comprehension, Research Design, Reading Materials, Family Income