Stephanie Stahl
Heart of a Parapsychologist: A Picaresque Novel


Stephanie Stahl holds a Bachelor of Science degree in Mathematics and Computer Science, explaining her heart's scientific bent and her cats' names, Cobol and Snobol. Her fascination with parapsychology is evident in Heart of a Parapsychologist: A Picaresque Novel.

Ms. Stahl began her writing career in 1997, writing a column about women in various professional fields. As the Editor for a local newsletter, she was recognized with a nomination for a national award. She has co-authored articles for academic journals in statistical psychology, and currently resides in Tallahassee, Florida where she tends her Blue Roses.

Published academic articles in seriation, unidimensional scaling, quantitative psychology and other amusements:

Stahl, S. and Brusco, M.J. "On a Linear Assignment Permutation Test Applied to Parapsychological Data: Computational Enhancements and Additional Applications." European Journal of Parapsychology, Vol. 22, No. 1 (April 2007), pp. 30-48. The accompanying files are available here EJP has been kind enough to offer a zip file containing the relevant files for this paper here.

Brusco, M. J., Köhn, H.-F. and Stahl, S. "Heuristic Implementation of Dynamic Programming for Matrix Permutation Problems in Combinatorial Data Analysis." Psychometrika, Vol. 73, No. 3, (September, 2008,)pp. 503-522.

Brusco, M.J., Stahl, S. and Steinley, D. "An implicit enumeration method for an exact Test of weighted kappa." British Journal of Mathematical and Statistical Psychology, (November, 2008), Vol. 61, No. 2, 439–452.

Stahl, S., Brusco, M.J. and Lorenz, F. "Branch-and-Bound Applications to Matrix Permutation Tests." British journal of Mathematical and Statistical Psychology, under review.

Brusco, M.J. and Stahl, S. "An algorithm for extracting maximum cardinality subsets with perfect dominance or anti-Robinson structure." British Journal of Mathematical and Statistical Psychology, Vol. 60, No. 2, (November, 2007), pp. 333-351. ForTran and MatLab code for all three examples in the paper is available here The subset extraction using BnB is also in an executable program, but you'll need to look around for it in the menus.

Brusco, M.J. and Stahl, S. Branch and Bound Applications in Combinatorial Data Analysis. Springer-Verlag Statistics and Computing series, September 2005. An accompanying program is here along with the chapter-by-chapter data . The list of ForTran progs is here . You can get the book from Amazon . or straight from the publisher, Springer

Brusco, M.J. and Stahl, S. "Bicriterion seriation methods for skew-symmetric matrices." British Journal of Mathematical and Statistical Psychology, Vol. 58, No. 2 (November, 2005), pp. 333-343. Code is available here

Brusco, M.J. and Stahl, S. "Optimal Least-Squares Unidimensional Scaling: Improved Branch-and-Bound Procedures and a Comparison to Dynamic Programming." Psychometrika, Vol. 70, No. 2 (June 2005), pp. 253-270.

Stahl, S. "Permutation-based Methods for Examining Confusion Data in ESP Experiments." Journal of Parapsychology, Vol. 68, No. 2 (Fall 2004), pp. 381-403.

Stahl, S. Heart of a Parapsychologist, (November, 2002).

Brusco, M.J., Cradit, J.D., and Stahl, S. "A Simulated Annealing Heuristic for a Bicriterion Partitioning Problem in Market Segmentation." Journal of Marketing Research, Vol. 39, No. 1 (February, 2002), pp. 99-109.

Brusco, M.J. and Stahl, S. "Compact Integer Programming Models for Extracting Subsets of Stimuli from Confusion Matrices." Psychometrika, Vol. 66, No. 3 (September, 2001), pp. 405-420.

Brusco, M.J. and Stahl, S. "An Interactive Approach to Multiobjective Combinatorial Data Analysis." Psychometrika, Vol. 66, No. 1 (March, 2001), pp. 5-24.

Brusco, M.J. and Stahl, S. "Using Quadratic Assignment Methods to Generate Initial Permutations for Unidimensional Scaling of Symmetric Proximity Matrices." Journal of Classification, Vol. 17, No. 2 (November, 2000), pp. 197-223.>/P>

Stahl, S. "Eve of the Millenium" MenTally, (1997-1998). See the articles here.

Links and Thinks:




 Here's a cool program from a talk at the Rhine Research center, "Extrasensory Confusion," BnB_RRC. This program has lots of things in it, including subset extraction from one of the above papers and so forth.



 Most of the above articles have been co-authored with Mike Brusco, who has a personal web page.


Classification Society of North America


Psychometric Society



Notes on finding optimal permutations for matrices using total enumeration , dynamic programming and branch'n'bound techniques.



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