Program 'stouffer': meta-analysis using Stouffer's method
Gang Chen
gangchen@mail.nih.gov
July 22, 2026
SSCC/NIMH/NIH/DHHS
Usage:
stouffer -prefix output.file.name -input here.is.a.list.of.input.files
The program is intended to perform meta-analysis using the Stouffer
method. Input files contain Z-statistic values, typically derived from
multiple studies. They can be in NIfTI or AFNI-tlrc format. T-statistic
values may also be used if the degrees of freedom are sufficiently large
(e.g., ≥30); otherwise, they should first be converted to Z-statistics.
The sample sizes for the individual studies are assumed to roughly equal.
The output is a Z-statistic reflecting the pooled evidence across studies.
The output file name can be specified with a suffix (.nii, .nii.gz, +tlrc);
the absence of a suffix defaults to an output in AFNI-tlrc format.
