Tracking missing data in longitudinal samples

I’ve been working on this massive longitudinal dataset recently.  And while I have the R tables function and a variety of other tools at my disposal – I find that I constantly go back to SAS for identifying which time points are missing data for each subject.  Since this is massively longitudinal data, I tend […]

The power of doing things in Parallel

There just isn’t enough time in the day to get everything done.  And the more time that I spend on getting little things done, the less time I have for the “big picture”.  Big picture will include writing papers, chapters, and grants.  The ability to do repetitive tasks quickly and automatically is probably the most important […]

Preprocessing EEG/ERP data

Years ago, I wrote a manual for preprocessing data using EGI’s Net Station software.  As I was cleaning out old files and burning things I never use to CD, I came across my collection of analysis PDFs.  I’ll start by uploading the first manual, which covers preprocessing ERP data by filtering, segmenting, artifact detection, bad […]

Creating automated snapshots of fMRI activation

There are plenty of times when you want to create snapshot images at a particular threshold so that you can quickly view the activation profiles of all participants within a given study.  AFNI offers this functionality through a plugout_drive application where you can tell AFNI to change overlay, underlay, threshold, etc and even save the screenshots […]

EEG Processing Tools

I used to have a MobileMe account where I made available several custom developed software programs for doing processing of EEG/ERP data.  I’ve listed them below as well as their download links and also will make them available on the main site (www.cogneurostats.com).  All programs run on Mac OS X and are written in Objective-C/Cocoa. […]