Figure 7.

Coarse-scale bias is sufficient for decoding both orientation and spiral sense. Slices were shifted by half a voxel (1 mm) on even-numbered runs. A, Measured slice position for each temporal frame of each scan, from one example scanning session. Slice position was measured using a robust image registration algorithm (Nestares and Heeger, 2000). B, Decoding accuracies when the classifier was trained and tested with data from either the same (green) or different (blue) slice positions (mean of two subjects).