A short form of the 60-item computer-based orthographic processing assessment (long-form COPA or COPA-LF) was developed. The COPA-LF consists of five skills, including rapid perception, access, differentiation, correction, and arrangement. Thirty items from the COPA-LF were selected for the short-form COPA (COPA-SF) based on cognitive diagnostic…

We report on a school-based randomized control trial study comparing two morphological interventions with untaught controls: one focusing on direct instruction targeting print morphological decoding (direct decoding condition) and the other on inquiry-focused pedagogy using oral morphological analysis (inquiry-analysis condition). We identified 63…

The purpose of this analysis was to describe cognitive processes associated with comorbid difficulty between word reading (WR) and mathematics computation (MC) at the start of first grade among children selected for WR and MC delays. A sample of 234 U.S. children (mean age 6.50 years, SD = 0.31) was assessed on WR, MC, core cognitive processes…

Objective: Executive Function (EF) is thought to be a core component of various cognitive processes. Two common ways to measure EF are through report-based measures that assess EF by collecting informant(s) reports on children's behaviors, and performance-based measures that assess EF through the completion of a task related to EF dimension(s).…

Facility with learning from multiple text documents is critical for college and career readiness. However, children with reading difficulties and disabilities have been largely excluded from research on multiple document comprehension. Accordingly, little is known about how children with reading difficulties and disabilities perform on…

Early diagnosis of children with reading disorders is essential for intervention and academic success. Many children with reading difficulties have a deficit in phonemic awareness. A web-based, group-administered screening vehicle, the Risk Factor Screen for Reading (RiFS-Reading), was developed to quickly identify students who are "At…

Background: Decades of research demonstrating the critical role of executive function (EF) and other regulation-related skills on children's short- and long-term outcomes has generated interest in measuring and cultivating these critical skills in early childhood and elementary school children (e.g., Bull et al., 2008; Moffitt et al., 2011). Most…

The present study investigated whether the socioeconomic achievement gap in academically at-risk students varied as a function of students' perceived classroom goal structures. We hypothesized that low socioeconomic status (SES) students would be more susceptible to the various classroom goal structures. Specifically, we hypothesized that high…

In 2 experiments, I studied the effects of the establishment of Incidental Bidirectional Naming (Inc. BiN) for unfamiliar stimuli on reading comprehension for first-grade students. In Experiment 1, I measured the associations, differences, and predictive value between multiple measures of reading comprehension and Inc. BiN stimulus control in 22…

ADHD is a behavioral cognitive correlate of achievement associated with lower reading performance. The externalizing and internalizing symptoms that characterize ADHD behaviors negatively impact the engagement of students experiencing reading difficulties and the ability to regulate attention and behavior during the reading acquisition process.…

Within the context of the Direct and Indirect Effects Model of Writing (Kim & Park, 2019), we examined a dynamic relations hypothesis, which contends that the relations of component skills, including reading comprehension, to written composition vary as a function of dimensions of written composition. Specifically, we investigated: (1) whether…

Pre-kindergarten (Pre-K) programs typically improve early academic skills, but those gains too often disappear after children transition to elementary school. At least three hypotheses explain this "fade-out" of Pre-K effects: Pre-K does not focus on the "trifecta skills" that uniquely support subsequent learning and…

We evaluate the direct and inferential mediation (DIME) model for reading comprehension with a sample of struggling readers in Grades 3 to 5 (N = 364) in the context of a large-scale randomized controlled trial (RCT) investigating two theoretically distinct reading interventions (text processing + foundational skills [n = 117] or text processing…

A longitudinal study was conducted to identify unique sources of individual differences in later understanding of the equal sign as a relational symbol of equivalence (i.e., formal understanding of mathematical equivalence). The sample included 141 children from a mid-sized city in the Midwestern United States (M[subscript age] = 6 years, 2 months…

Little is known about mismatches between the language of mathematics testing instruments and the rich linguistic repertoires that African American children develop at home and in the community. The current study aims to provide a proof of concept and novel explanatory item response design that uses error analysis to investigate the relationship…