Month: July 2011

Before we went to Arlington, VA to get our hands on the National Indian Education Study , my colleague, Dr. Erich Longie, hypothesized that schools that had more cultural activities would have lower academic achievement. In addition to being an old friend, Dr. Longie is president of Spirit Lake Consulting, Inc. , a published author…

Any time you add another layer of complexity you better have a damn good reason. I’m often skeptical of proponents of both Item Response Theory and multiple imputation procedures, not because either IRT or MI is a bad thing in itself but because its inclusion makes data analysis and reporting more complicated. At the National…