Paul Yoder, Ph.D. is a Professor in Vanderbilt University's Department of Special Education. As the past director of the Observational and Quantitative Methods core for the Kennedy Center of Vanderbilt University, he has consulted for numerous single subject and group design researchers for over 20 years. He has conducted methodological studies and written methodological and measurement articles and chapters for both single subject and group design literatures. Among these are 3 simulation studies relevant to sequential analysis. He currently teaches a recurring course on observational measure...