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Correlation3
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Item Response Theory1
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Applied Psychological…3
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Brand, Paul A.1
Drasgow, Fritz1
Gu, Fei1
Hoyle, Larry1
Kingston, Neal M.1
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Skorupski, William P.1
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Standard Errors and Confidence Intervals from Bootstrapping for Ramsay-Curve Item Response Theory Model Item Parameters
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Gu, Fei; Skorupski, William P.; Hoyle, Larry; Kingston, Neal M. – Applied Psychological Measurement, 2011
Ramsay-curve item response theory (RC-IRT) is a nonparametric procedure that estimates the latent trait using splines, and no distributional assumption about the latent trait is required. For item parameters of the two-parameter logistic (2-PL), three-parameter logistic (3-PL), and polytomous IRT models, RC-IRT can provide more accurate estimates…
Descriptors: Intervals, Item Response Theory, Models, Evaluation Methods
Determining the Significance of Correlations Corrected for Unreliability and Range Restriction.
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Raju, Nambury S.; Brand, Paul A. – Applied Psychological Measurement, 2003
Proposed a new asymptotic formula for estimating the sampling variance of a correlation coefficient corrected for unreliability and range restriction. A Monte Carlo simulation study of the new formula results in several positive conclusions about the new approach. (SLD)
Descriptors: Correlation, Monte Carlo Methods, Reliability, Sampling
Estimators of the Squared Cross-Validity Coefficient: A Monte Carlo Investigation.
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And Others; Drasgow, Fritz – Applied Psychological Measurement, 1979
A Monte Carlo experiment was used to evaluate four procedures for estimating the population squared cross-validity of a sample least squares regression equation. One estimator was particularly recommended. (Author/BH)
Descriptors: Correlation, Least Squares Statistics, Mathematical Formulas, Multiple Regression Analysis