How good is the data collected by the VA SOS Modified Method?
In 2002, scientists Sarah Engel and Reese Voshell published an evaluation of the traditional SOS method (the National IWLA method) and developed the Modified VA SOS method. The research study was published in American Entomologist, and we have been given permission (through Dr. Voshell) for unlimited distribution of the article.
- Volunteer Biological Monitoring: Can It Accurately Assess the Ecological Condition of Streams? Sarah R. Engel and J. Reese Voshell, Jr.. 2002. American Entomologist 48 (3): 164-177.
Additional Resources (PDF)
- Virginia Tech Study on Modified Method as compared to VA-SCI
- Virginia Commonwealth University Study on VA SOS Modified Method in Piedmont Streams of Virginia