Two research articles by Professor Young-Suk Kim, published in the journal Scientific Studies of Reading, have been recognized as #1 and #3 "Most Cited" articles in 2018. Scientific Studies of Reading is the flagship journal of the Society for the Scientific Studies of Reading, and a top tier journal in the fields of both education and psychology.
# 1 Most Cited: "Why the Simple View of Reading Is Not Simplistic: Unpacking Component Skills of Reading Using a Direct and Indirect Effect Model of Reading (DIER)"
Pathways of relations of language, cognitive, and literacy skills (i.e., working memory, vocabulary, grammatical knowledge, inference, comprehension monitoring, word reading, and listening comprehension) to reading comprehension were examined by comparing four variations of direct and indirect effects model of reading. Results from 350 English-speaking second graders revealed that language and cognitive component skills had direct and indirect relations to listening comprehension, explaining 86% of variance. Word reading and listening comprehension completely mediated the relations of language and cognitive component skills to reading comprehension and explained virtually all the variance in reading comprehension. Total effects of component skills varied from small to substantial. The findings support the direct and indirect effects model of reading model and indicate that word reading and listening comprehension are upper-level skills that are built on multiple language and cognitive component skills, which have direct and indirect relations among themselves. The results underscore the importance of understanding nature of relations.
Kim, Y.-S. G. (2017). Why the simple view of reading is not simplistic: Unpacking the simple view of reading using a direct and indirect effect model of reading (DIER). Scientific Studies of Reading, 21(4), 310-333. doi:10.1080/10888438.2017.1291643
# 3 Most Cited: "Text (Oral) Reading Fluency as a Construct in Reading Development: An Investigation of its Mediating Role for Children from Grades 1 to 4"
In the present study we investigated a developmentally changing role of text reading fluency in mediating the relations of word reading fluency and listening comprehension to reading comprehension. We addressed this question by using longitudinal data from Grades 1 to 4, and employing structural equation models. Results showed that the role of text reading fluency changes over time as children’s reading proficiency develops. In the beginning phase of reading development (Grade 1), text reading fluency was not independently related to reading comprehension over and above word reading fluency and listening comprehension. In Grades 2 to 4, however, text reading fluency completely mediated the relation between word reading fluency and reading comprehension whereas it partially mediated the relation between listening comprehension and reading comprehension. These results suggest that text reading fluency is a dissociable construct that plays a developmentally changing role in reading acquisition.
Kim, Y.-S. G., & Wagner, R. K. (2015). Text (Oral) reading fluency as a construct in reading development: An investigation of its mediating role for children from Grades 1 to 4. Scientific Studies of Reading, 19(3), 224-242. doi:10.1080/10888438.2015.1007375