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Paul A. Jewsbury; Matthew S. Johnson – Large-scale Assessments in Education, 2025
The standard methodology for many large-scale assessments in education involves regressing latent variables on numerous contextual variables to estimate proficiency distributions. To reduce the number of contextual variables used in the regression and improve estimation, we propose and evaluate principal component analysis on the covariance matrix…
Descriptors: Factor Analysis, Matrices, Regression (Statistics), Educational Assessment
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Stanley, T. D.; Doucouliagos, Hristos – Research Synthesis Methods, 2023
Partial correlation coefficients are often used as effect sizes in the meta-analysis and systematic review of multiple regression analysis research results. There are two well-known formulas for the variance and thereby for the standard error (SE) of partial correlation coefficients (PCC). One is considered the "correct" variance in the…
Descriptors: Correlation, Statistical Bias, Error Patterns, Error Correction
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Bishara, Anthony J.; Hittner, James B. – Educational and Psychological Measurement, 2015
It is more common for educational and psychological data to be nonnormal than to be approximately normal. This tendency may lead to bias and error in point estimates of the Pearson correlation coefficient. In a series of Monte Carlo simulations, the Pearson correlation was examined under conditions of normal and nonnormal data, and it was compared…
Descriptors: Research Methodology, Monte Carlo Methods, Correlation, Simulation
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Read, Kirsten; Macauley, Megan; Furay, Erin – First Language, 2014
This study examines the potential benefits of rhyme on young children's word retention during shared reading. In two experiments, 2- to 4-year-old children heard their parent read either a rhymed or non-rhymed version of the same animal story, and were then tested on how many animal names they subsequently recognized from the story in Experiment 1…
Descriptors: Rhyme, Retention (Psychology), Word Recognition, Reading Instruction
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Stambaugh, Laura A. – Psychology of Music, 2013
The purpose of this study was to investigate the effects of cognitive load during practice on university wind students' learning. Cognitive load was manipulated through instrument family (woodwind or brass) and the amount of repetition used in practice (highly repetitive or random). University woodwind and valved-brass students (N = 46)…
Descriptors: Undergraduate Students, Cognitive Processes, Difficulty Level, Musical Instruments
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Colombo, Lucia; Fonti, Cristina; Stracciari, Andrea – Neuropsychologia, 2009
A group of 20 patients with probable Alzheimer disease (AD) and a control group were tested in a verb generation task, in a verb synonym task and several cognitive tests. Three types of verbs and novel verbs were presented in simple sentence frames, in two different conditions. In one condition participants were presented with the verb in the…
Descriptors: Control Groups, Semantics, Verbs, Alzheimers Disease