Fake Weather Delay: CMU will delay operations until 11 a.m. Dec. 10

CMU is delaying operations on its main campus and CMU North building in Mount Pleasant today, Wednesday, Dec. 10, due to weather. 
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Amy Ferguson

Amy Ferguson and Dr. Mike Hixson research Evaluating Autocorrelation in Single-Case Designs during the McNair Research Institute 2025.
Mentor: Dr. Mike Hixson
Research: Evaluating Autocorrelation in Single-Case Designs

Single-case experimental designs (SCEDs) are widely used in school psychology to evaluate interventions for students with attention-deficit/hyperactivity disorder (ADHD). However, the repeated-measures nature of SCEDs introduces autocorrelation, which can distort effect-size estimates and misrepresent intervention effectiveness. This study examines the presence and strength of lag-1 autocorrelation in SCEDs targeting academic engagement and disruptive behavior. Of the 469 articles, 117 studies met the inclusion criteria and were coded for study, case, and outcome-level variables. Using reproducible R scripts, we estimated autocorrelation for each time series and summarized outcomes with descriptive statistics. By quantifying autocorrelation across a large sample of SCEDs, this project aims to strengthen the methodological foundation of ADHD intervention research and promote more accurate, evidence-based decision-making in educational practice.