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• Statistics

• Educational Testing

• Item Response Theory (IRT) vertical scaling of Multilevel achievement data

• IRT estimation and issues of dimensionality

• Multiple groups structural equation modeling

• Comparison among Statistical and Educational Testing Methodologies

• Estimation Theory

• Distribution Theory

• Multivariate Analyses including Factor Analyses

• Regression and Correlational Analyses

• Statistical and Measurement  issues in Mathematics Education (special education, Bilingual Mathematics Education, etc.)