Developments in Random Field Theory
نویسنده
چکیده
Random field theory is used in the statistical analysis of SPM’s whenever there is a spatial component to the inference. Most important is the question of detecting an effect or activation at an unknown spatial location. Very often we do not know in advance where to look for an effect, and we are interested in searching the whole brain, or part of it. This presents special statistical problems related to the problem of multiple comparisons, or multiple tests. Two methods have been proposed, the first based on the maximum of the T or F statistic, the second based on the spatial extent of the region where these statistics exceed some threshold value. Both involve results from random field theory (Adler, 1981).
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