Table 1.

Folder names for variants in each software package (columns 3–5), for each variant type (columns 1–2).

	Variant name	AFNI	FSL	SPM
Model	First-level regression	Default afni_default	Default fsl_default	Default spm_default
	Second level: 1 sample t-test with ordinary least squares	afni_group_ols	fsl_group_ols	spm_group_ols
	Second level: 1 sample t-test with weighted least squares	afni_group_wls	fsl_group_wls	spm_group_wls
Hemodynamic response function (HRF)	Gamma difference	afni_hrf_gammadiff	fsl_hrf_gammadiff	Default spm_default
	Gamma	Default afni_default	Default fsl_default	NA
	FIR/TENT Basis Function	afni_hrf_tent	fsl_hrf_fir	spm_hrf_fir
Threshold	voxel-wise uncorrected p ≤ 0.001	Default∗ afni_default	Default∗ fsl_default	Default∗ spm_default
	voxel-wise uncorrected t ≥ 4	afni_thr_voxelunct4	NA	spm_thr_voxelunct4
	voxel-wise (peak-wise) FWE p ≤ 0.05	NA	fsl_thr_voxelfwep05	spm_thr_voxelfwep05
	voxel-wise FDR p ≤ 0.05	afni_thr_voxelfdrp05	NA	spm_thr_voxelfdrp05
	Cluster-wise uncorrected k ≥ 10, cluster-defining threshold p ≤ 0.001	afni_thr_clustunck10	NA	spm_thr_clustunck10
	Cluster-wise FWE p ≤ 0.05, cluster-defining threshold p ≤ 0.001	afni_thr_clustfwep05	fsl_thr_clustfwep05	spm_thr_clustfwep05
Contrast type	t-contrast	Default∗∗ afni_default	Default∗∗ fsl_default	Default∗∗ spm_default
	f-contrast	afni_con_f	fsl_con_f	spm_con_f
Cluster connectivity	6-Connected: faces	Default afni_default	NA	NA
	18-Connected: faces and edges	afni_clustconn_18	NA	Default spm_default
	26-Connected: faces, edges, and corners	afni_clustconn_26	Default fsl_default	NA
Hypothesis type	One-tailed test	afni_alt_onesided	Default fsl_default	Default spm_default
	Two-tailed test	Default afni_default	NA	NA

Default tests are marked in bold in the table. ^∗For group-level analyses, the default threshold is cluster-wise p ≤ 0.05 FWE-corrected. ^∗∗For analyses using flexible basis functions to model the HRF the default test is an f-test with an identity matrix of size equal to the number of basis.