Dear All, I would like to examine the HRF generated by spm2, and it would be most convenient to be able to convolve my given boxcar with the HRF without having to specify a model etc. I understand how I can use spm_HRF to get the overall timecourse, but I did not quite get how to apply this to a number of timepoints in a row (e.g., for a block-design). As always, any hints are appreciated, Best, Marko -- ===================================================================== Marko Wilke (Dr.med./M.D.) [log in to unmask] Universitäts-Kinderklinik University Children's Hospital Abt. III (Neuropädiatrie) Dept. III (Pediatric neurology) Hoppe-Seyler-Str. 1, D - 72076 Tübingen Tel.: (+49) 07071 29-83416 Fax: (+49) 07071 29-5473 =====================================================================