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Reducing Bias and Error in the Correlation Coefficient Due to Nonnormality
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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
Standardized Effect Size Measures for Mediation Analysis in Cluster-Randomized Trials
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Stapleton, Laura M.; Pituch, Keenan A.; Dion, Eric – Journal of Experimental Education, 2015
This article presents 3 standardized effect size measures to use when sharing results of an analysis of mediation of treatment effects for cluster-randomized trials. The authors discuss 3 examples of mediation analysis (upper-level mediation, cross-level mediation, and cross-level mediation with a contextual effect) with demonstration of the…
Descriptors: Effect Size, Measurement Techniques, Statistical Analysis, Research Design
Suppressor Effects of Coping Strategies on Resilience
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Yoon, Jae ho; Lee, Ji hae; Lee, Chae Yeon; Cho, Minhee; Lee, Sang Min – Asia Pacific Education Review, 2014
The purpose of the current study is to demonstrate a significant suppressor effect among coping strategies on resilience. Two different samples were used to replicate the suppressor effect. Participants in the first example were 391 adolescents (middle school students) in Korea, and participants in the second example were 282 young adults…
Descriptors: Foreign Countries, Coping, Resilience (Psychology), Adolescents
Randomization-Based Inference about Latent Variables from Complex Samples: The Case of Two-Stage Sampling
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Li, Tiandong – ProQuest LLC, 2012
In large-scale assessments, such as the National Assessment of Educational Progress (NAEP), plausible values based on Multiple Imputations (MI) have been used to estimate population characteristics for latent constructs under complex sample designs. Mislevy (1991) derived a closed-form analytic solution for a fixed-effect model in creating…
Descriptors: National Competency Tests, Statistical Analysis, Educational Assessment, Test Theory
Educational Systems Efficiency in European Union Countries
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Giambona, Fracesca; Vassallo, Erasmo; Vassiliadis, Elli – Studies in Educational Evaluation, 2011
We use the PISA 2006 results to analyse students' proficiency in EU countries with regard to two indexes that represent the home background, viz the educational resources available at home and the family background of students. However, many factors affect proficiency and therefore, using a DEA-bootstrap, we intend to measure the efficiency of the…
Descriptors: Foreign Countries, Measurement Techniques, Predictor Variables, Educational Environment
Estimating the Population of Rural Communities by Age and Gender: A Case Study of the Effectiveness of Local Expert Procedure.
Swanson, David; And Others – Small Town, 1995
Increasingly, unpopular facilities are sited in sparsely populated areas for which data are unavailable. The Local Expert Procedure (LEP) estimates selected demographic characteristics of small, rural areas by combining the housing unit method of population estimation with random sampling and key informant ethnography. Factors affecting the…
Descriptors: Data Collection, Demography, Maximum Likelihood Statistics, Measurement Techniques