TY - JOUR
T1 - Ordinary least squares dipole localization is influenced by the reference
AU - Huizenga, Hilde M.
AU - Molenaar, Peter C.M.
PY - 1996/12
Y1 - 1996/12
N2 - It is shown empirically, analytically and in simulations that common and average referenced recordings differentially affect the accuracy of equivalent source estimates. This effect is mediated by the influence of the reference on noise correlations. The general conclusion of this analysis is that, if software only allows for ordinary least squares estimation (OLS), then average referencing should be preferred, although these estimates will still be sub-optimal. Optimal estimates are derived by generalized least squares (GLS) which accounts for correlated noise. With GLS, average and common referenced recordings give rise to comparable accuracy.
AB - It is shown empirically, analytically and in simulations that common and average referenced recordings differentially affect the accuracy of equivalent source estimates. This effect is mediated by the influence of the reference on noise correlations. The general conclusion of this analysis is that, if software only allows for ordinary least squares estimation (OLS), then average referencing should be preferred, although these estimates will still be sub-optimal. Optimal estimates are derived by generalized least squares (GLS) which accounts for correlated noise. With GLS, average and common referenced recordings give rise to comparable accuracy.
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U2 - 10.1016/S0013-4694(96)95659-X
DO - 10.1016/S0013-4694(96)95659-X
M3 - Article
C2 - 9020816
AN - SCOPUS:0030476719
SN - 0013-4694
VL - 99
SP - 562
EP - 567
JO - Electroencephalography and Clinical Neurophysiology
JF - Electroencephalography and Clinical Neurophysiology
IS - 6
ER -