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Electrode position scaling in realistic laplacian computation

. 2008 Sep ; 55 (9) : 2314-6.

Language English Country United States Media print

Document type Evaluation Study, Journal Article, Research Support, Non-U.S. Gov't

This note discusses the effects of the electrode position scaling on the realistic Laplacian (RL) computation. It is shown that when the RL is estimated with the help of Tikhonov regularization and the generalized cross-validation (GCV) criterion, improper electrode position scaling may influence the GCV criterion, which results in the decrease of RL precision. We identify what the proper scaling should be, and we provide a closer examination of how the GCV criterion is affected by the electrode position scaling.

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