Application of magnetic ion imprinted polymers for simultaneous quantification of Al3+ and Be2+ ions using the mean centering of ratio spectra method.
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DOI: 10.1016/j.talanta.2020.122003
Abstract: Magnetic solid-phase extraction (MSPE) coupled with the spectrophotometric method for the simultaneous quantification of aluminum and beryllium ions based on mean centering of ratio (MCR) method is reported in the current work, for the first… read more here.
Keywords: centering ratio; method; mean centering; simultaneous quantification ... See more keywords
Double Decomposition of Level-1 Variables in Multilevel Models: An Analysis of the Flynn Effect in the NSLY Data
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DOI: 10.1080/00273171.2017.1354758
Abstract: ABSTRACT This paper introduces an extension of cluster mean centering (also called group mean centering) for multilevel models, which we call “double decomposition (DD).” This centering method separates between-level variance, as in cluster mean centering,… read more here.
Keywords: cluster mean; analysis; mean centering; level ... See more keywords
Mean centering, multicollinearity, and moderators in multiple regression: The reconciliation redux
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DOI: 10.3758/s13428-016-0827-9
Abstract: In this article, we attempt to clarify our statements regarding the effects of mean centering. In a multiple regression with predictors A, B, and A × B (where A × B serves as an interaction… read more here.
Keywords: centering multicollinearity; regression; mean centering; multicollinearity moderators ... See more keywords