Hello Nan, I am unable to replicate this behaviour locally - can you let me know what FSL version you are using and exactly which threshold you are changing? Kind Regards Matthew On 30 Jun 2013, at 13:10, Nan Wise wrote: > Dear Experts, > > As advised during the recent FSL course,(THANK YOU ALL!) , I am now using the estimate hp filter function and have noticed that the estimated hp changes for the same data and same design matrix when I change the thresholds at first level. > > Is this supposed to happen? And if so, can you explain why so I can understand. > > Humbly and with appreciation! > > Nan > > Nan Wise, Ph.D. candidate > Cognitive Neuroscience, Rutgers-Psychology > Certified Sex Therapist, AASECT > Fellow, The American Psychotherapy Association > Fellow, The National Board for Clinical Hypnotherapists > Board Certified Diplomate, The American Board of Examiners in Social Work > > > >