Search Results - subject:"sandwich-type covariance matrix"

Information Matrices and Standard Errors for MLEs of Item Parameters in IRT

Yuan, Ke-Hai; Cheng, Ying; Patton, Jeff - In: Psychometrika 79 (2014) 2, pp. 232-254

that is the middle piece of a sandwich-type covariance matrix. Monte Carlo results indicate that standard errors (SEs …. SEs based on the sandwich-type covariance matrix perform most consistently across conditions. Results also suggest that … SEs based on other matrices are either not consistent or perform not as robust as those based on the sandwich-type …

Persistent link: https://www.econbiz.de/10010848144

Moderation Analysis Using a Two-Level Regression Model

Yuan, Ke-Hai; Cheng, Ying; Maxwell, Scott - In: Psychometrika 79 (2014) 4, pp. 701-732

Moderation analysis is widely used in social and behavioral research. The most commonly used model for moderation analysis is moderated multiple regression (MMR) in which the explanatory variables of the regression model include product terms, and the model is typically estimated by least...

Persistent link: https://www.econbiz.de/10011151905

The Effect of Skewness and Kurtosis on Mean and Covariance Structure Analysis

Yuan, Ke-Hai; Bentler, Peter M.; Zhang, Wei - In: Sociological Methods & Research 34 (2005) 2, pp. 240-258

The maximum likelihood (ML) method, based on the normal distribution assumption, is widely used in mean and covariance structure analysis. With typical nonnormal data, the ML method will lead to biased statistics and inappropriate scientific conclusions. This article develops a simple but...

Persistent link: https://www.econbiz.de/10010789479