With only about a third of students in US public schools achieving the NAEP Proficient level, many educators believe students are not getting enough reading practice. However, how much reading practice is enough? This study quantifies the relationship between the amount of book reading and the expected number of words learned. We collected 45…

This quantitative study examines the Lexile level, estimated volume, and genre of fourth- and fifth-grade texts used in four popular core reading series to analyze the programs' possible effects on instruction and comprehension. The four series include Houghton Mifflin Harcourt's Into Reading, Lucy Calkins' Units of Study for Teaching Reading,…

Many initiatives have emphasized the importance of challenging students in text using readability formulas. Almost all formulas employ mean word frequency yet long-standing issues abound. Researchers question using a singular mean with a skewed variable like frequency. They also question the degree to which frequency pinpoints complex words,…

This study examined affix letter spelling among 6th grade Hebrew-speaking children with dyslexia compared with chronologically age-matched and reading level-matched controls. As different languages are characterized by multiple dimensions of affix spelling complexity, we specifically targeted the following unique dimensions relevant to Hebrew: (1)…

Vocabulary knowledge is one of the most important elements of reading comprehension. Text coverage is the proportion of known words in a given text. We hypothesize that text comprehension increases exponentially with text coverage due to network effects and activation of prior knowledge. In addition, the lexical threshold hypothesis states that…

This study presents the results of a cross-sectional reading and spelling assessment conducted among 118 Spanish children in 3rd, 4th and 5th grade. The first aim was to explore whether children's use of orthographic knowledge was modulated by lexical variables--word frequency and orthographic neighborhood--or sublexical…

Reading acquisition involves connections between the spoken language and the writing system. The English-language writing system holds an inconsistent alphabetic system, thus encouraging readers to develop representations between the grapheme and the word. Reading in English as a Foreign language supposes a challenge, especially when the reader's…

Word knowledge acquisition is an incremental process that relies on exposure. As a result, word knowledge can broadly range from recognizing the word's lexical status, to knowing its meaning in context, and to knowing its meaning independent of context. The present study aimed to model incremental word knowledge in 1454 upper primary school…

This study was conducted to determine the vocabulary coefficients of the themes in 7 Turkish textbooks taught during the 2019-2020 academic year. The study of the vocabulary coefficients of the themes is a method specific to the claim of the research. There are subject scopes and concept areas specific to the themes in the Turkish textbooks. The…

With the help of the Word Association Test (WAT), the present study aimed to reveal elementary school fourth grade students' cognitive structures regarding the values to be taught in relation to the learning areas within the scope of the course of social studies. The participants in the study were elementary school fourth grade students. In the…

This study investigated the effects of exposure frequency, depth of processing, and activity repetition types on vocabulary learning. In total, 78 South Korean fifth-grade students were divided into four conditions. Students in each condition were asked to read a passage with four of the eight target words (exposure: four times) and the other four…

We modeled word reading growth in typically developing (n = 118) and children with dyslexia (n = 20), Grades 2-5, across multiple exposures to 30 words. We explored the facilitative versus inhibitory effects of exposures to differential mixes of words that support high- versus low-frequency vowel pronunciations. One training corpus contained a…

Semantic diversity -- a metric that captures variations in previous contextual experience with a word -- influences children's lexical decision and reading aloud. We investigated the effects of semantic diversity and frequency on children's reading of words embedded in sentences, while eye movements were recorded. If semantic diversity and…

According to the RAND model framework, reading comprehension test performance is influenced by readers' reading skills or reader characteristics, test properties, and their interactions. However, little empirical research has systematically compared the impacts of reader characteristics, test properties, and reader-test interactions across…

While recent studies find that contextual diversity (CD) is a better determinant of visual word recognition than token frequency, there is a dearth of work comparing contextual diversity and token frequency in developing readers. In two sets of character and lexical decision experiments we examined token frequency and contextual diversity effects…