Peter M. Nelson

Abnormal striatal resting-state functional connectivity in adolescents with obsessive–compulsive disorder

Neuroimaging research has implicated abnormalities in cortico-striatal-thalamic-cortical (CSTC) circuitry in pediatric obsessive-compulsive disorder (OCD). In this study, resting-state functional magnetic resonance imaging (R-fMRI) was used to investigate functional connectivity in the CSTC circuitry in adolescents with OCD. Imaging was obtained with the Human Connectome Project (HCP) scanner using newly developed pulse sequences which allow for higher spatial and temporal resolution. Fifteen adolescents with OCD and 13 age- and gender-matched healthy controls (ages 12-19) underwent R-fMRI on the 3T HCP scanner. Twenty-four minutes of resting-state scans (two consecutive 12-min scans) were acquired. We investigated functional connectivity of the striatum using a seed-based, whole brain approach with anatomically-defined seeds placed in the bilateral caudate, putamen, and nucleus accumbens. Adolescents with OCD compared with controls exhibited significantly lower functional connectivity between the left putamen and a single cluster of right-sided cortical areas including parts of the orbitofrontal cortex, inferior frontal gyrus, insula, and operculum. Preliminary findings suggest that impaired striatal connectivity in adolescents with OCD in part falls within the predicted CSTC network, and also involves impaired connections between a key CSTC network region (i.e., putamen) and key regions in the salience network (i.e., insula/operculum). The relevance of impaired putamen-insula/operculum connectivity in OCD is discussed.

Comparison of the Effects of Computer-Based Practice and Conceptual Understanding Interventions on Mathematics Fact Retention and Generalization

ABSTRACT The authors’ purpose was to determine the effects of computer-based practice and conceptual interventions on computational fluency and word-problem solving of fourth- and fifth-grade students with mathematics difficulties. A randomized pretest–posttest control group design found that students assigned to the computer-based practice intervention group outperformed students in the comparison group on the retention measure. Students assigned to the conceptual intervention did not outperform the comparison group on any of the outcome variables. Implications for instruction and interventions are discussed.

Number of Repetitions Required to Retain Single-Digit Multiplication Math Facts for Elementary Students.

Computational fluency is an important aspect of math proficiency. Despite widely held beliefs about the differential difficulty of single-digit multiplication math facts, little empirical work has examined this issue. The current study analyzed the number of repetitions needed to master multiplication math facts. Data from 15,402 3rd, 4th, and 5th graders were analyzed using a national database. Results suggested that (a) students with lower math skills required significantly (p < .001) more repetitions than more skilled students; (b) across all students, single-digit multiplication facts with 4s, 5s, 6s, and 7s required significantly (p < .001) more repetition than did 2s and 3s; and (c) the number of practice sessions needed to attain mastery significantly (p < .001) decreased with increase in grade level. Implications for instructional planning and implementation are discussed.

The responsive environmental assessment for classroom teaching (REACT): The dimensionality of student perceptions of the instructional environment

This study details the initial development of the Responsive Environmental Assessment for Classroom Teachers (REACT). REACT was developed as a questionnaire to evaluate student perceptions of the classroom teaching environment. Researchers engaged in an iterative process to develop, field test, and analyze student responses on 100 rating-scale items. Participants included 1,465 middle school students across 48 classrooms in the Midwest. Item analysis, including exploratory and confirmatory factor analysis, was used to refine a 27-item scale with a second-order factor structure. Results support the interpretation of a single general dimension of the Classroom Teaching Environment with 6 subscale dimensions: Positive Reinforcement, Instructional Presentation, Goal Setting, Differentiated Instruction, Formative Feedback, and Instructional Enjoyment. Applications of REACT in research and practice are discussed along with implications for future research and the development of classroom environment measures.

A Comparison of Methods to Screen Middle School Students for Reading and Math Difficulties

Abstract. The current study explored multiple ways in which middle schools can use and integrate data sources to predict proficiency on future high-stakes state achievement tests. The diagnostic accuracy of (a) prior achievement data, (b) teacher rating scale scores, (c) a composite score combining state test scores and rating scale responses, and (d) two gated screening approaches was compared in a sample of 614 middle school students. Prior state test performance emerged as the strongest single predictor of future state test scores; however, results provide evidence that educators may consider locally derived cut scores or alternative screening procedures that incorporate multiple data sources. Specifically, the combination of prior achievement data and teacher ratings of student competence often resulted in increases in either sensitivity or specificity as a function of how data sources were combined.

Foundations of Fluency-Based Assessments in Behavioral and Psychometric Paradigms

The chapter presents previous and near term applications and innovations for the assessment of rate-based measures such as fluency. The historical and future developments are discussed within the context of an ideographic behavioral and nomothetic psychometric paradigms of assessment. These paradigms are described and contrasted with descriptions of classical test theory (CTT), generalizability theory (GT), and item response theory (IRT). The interpretation and use argument (IUA) is used to frame the contemporary view on unified validity. These theoretical models are combined with an applied perspective to contextualize and encourage future developments in the measurement of fluency.

Student Perceptions of the Classroom Environment Actionable Feedback to Guide Core Instruction

The impact and feasibility of using student perceptions of the classroom teaching environment as an instructional feedback tool were explored. Thirty-one teachers serving 797 middle school students collected data twice across 3 weeks using the Responsive Environmental Assessment for Classroom Teaching (REACT). Researchers randomly assigned half of the teachers to receive student feedback following the first data collection. Student responses in the classrooms of teachers who received feedback were more positive in the second round of data collection compared with the teachers who did not receive feedback. Students’ initial REACT scores, gender, and self-reported trouble in class were also significant predictors of REACT scores at the second data collection. Finally, teachers reported the REACT to be feasible for use in practice.

Single Measure and Gated Screening Approaches for Identifying Students At-Risk for Academic Problems: Implications for Sensitivity and Specificity.

Educators need recommendations to improve screening practices without limiting students’ instructional opportunities. Repurposing previous years’ state test scores has shown promise in identifying at-risk students within multitiered systems of support. However, researchers have not directly compared the diagnostic accuracy of previous years’ state test scores with data collected during fall screening periods to identify at-risk students. In addition, the benefit of using previous state test scores in conjunction with data from a separate measure to identify at-risk students has not been explored. The diagnostic accuracy of 3 types of screening approaches were tested to predict proficiency on end-of-year high-stakes assessments: state test data obtained during the previous year, data from a different measure administered in the fall, and both measures combined (i.e., a gated model). Extant reading and math data (N = 2,996) from 10 schools in the Midwest were analyzed. When used alone, both measures yielded similar sensitivity and specificity values. The gated model yielded superior specificity values compared with using either measure alone, at the expense of sensitivity. Implications, limitations, and ideas for future research are discussed.

Diagnostic Accuracy of Multivariate Universal Screening Procedures for Reading in Upper Elementary Grades.

We examined the diagnostic accuracy and efficiency of three approaches to universal screening for reading difficulties using retrospective data from 1,307 students in Grades 3 through 5. School staff collected screening data using the Measures of Academic Progress (MAP), a curriculum-based measure (CBM), and running records (RR). The criterion measure was a high-stakes state accountability test aligned with the Common Core State Standards. We examined the diagnostic accuracy of the tests in isolation, as multivariate batteries, and via a simulated gated-screening approach. CBM and RR data resulted in unacceptable diagnostic accuracy across all three grades. In the fourth grade, the MAP alone resulted in the best balance of sensitivity and specificity. Among third- and fifth-grade students, the multivariate combination of MAP and CBM demonstrated the best balance between diagnostic accuracy and efficiency. Gated-screening increased specificity but lowered sensitivity. Results highlight the need for population-specific considerations in universal screening.

Reduce, Reuse, Recycle The Longitudinal Value of Local Cut Scores Using State Test Data

We used existing reading (n = 1,498) and math (n = 2,260) data to evaluate state test scores for screening middle school students. In Phase 1, state test data were used to create a research-derived cut score that was optimal for predicting state test performance the following year. In Phase 2, those cut scores were applied with future cohorts. Diagnostic accuracy of the research-derived cut scores was compared with the state’s proficiency benchmark from the previous year. Across grades and content areas, research-derived cut scores yielded higher sensitivity and lower specificity values relative to state-defined cut scores. Marked decreases in sensitivity and specificity were not observed in subsequent years. Results provide evidence for procedures in which previous state test data are repurposed for screening decisions.