eng TQMP Tutorials in Quantitative Methods for Psychology 1913-4126 2006-09-01 2 2 84 84 article The CMU Soar research group cmu@cmu.edu 1 Carnegie Mellon University Courtesy of the Carnegie Mellon University Archives/Allen Newell Collection. http://www.tqmp.org/Content/vol02-2/p084/p084.pdf Power law Obituary