The Smoothing Artifact of Spatially Constrained Canonical Correlation Analysis in Functional MRI

Table 1

Number of voxels affected by the smoothing artifact for different data analysis methods as a function of 𝑃> threshold in motor activation data for contrast “motor” minus “fixation”.

Threshold	SV + GS	cCCA sum	cCCA avg	cCCA max
0.5	34	0	9	27
0.4	38	0	14	40
0.3	40	0	24	51
0.2	42	0	48	104
0.1	43	0	98	174