MARCH 1ST - MARCH 5TH, 2004.

The next workshop will be held in Boulder, Colorado, March 1 - 5, 2004, with John Hewitt as local host. Most of the application programming will be based on the package Mx, developed by Dr. Mike Neale for the flexible analysis of genetically-informative data. The Mx home page is at

This course is intended to be introductory. Participants interested in more advanced work (e.g., those who have attended earlier workshops) should consider the advanced workshop planned for 2005.

The registration fee will be $300.00 on or before January 9, 2004 and after this date the fee will increase to $400.00. The fee is fully refundable up until February 1 and non-refundable after February 1. Accommodations will be reserved at the hosting facility. Details of local arrangements, registration, and accommodation will be made available as the Workshop venue is finalized. A home page is being established on the World Wide Web at  Check the webpage for updates on accomodation pricing and status.

The provisional faculty roster includes:
H. Maes, M. Neale [Academic Director] Richmond, VA, USA
A. Heath St. Louis, MO, USA
N. Martin Brisbane, Queensland, Australia
D. Boomsma, C. van Baal Amsterdam, The Netherlands
F. Rijsdijk, P. Sham London, UK
L. Cardon, S. Cherny Oxford, UK
G. Abecasis Ann Arbor, MI, USA
S. Purcell Boston, MA, USA
J. Hewitt, J. Lessem Boulder, CO, USA

The course will include: Use of twins in genetic analysis; causes of variation; univariate twin analysis; between group heterogeneity; path analysis; analysis of raw data; multivariate genetic analysis; multiple raters; sibling effects; categorical data; power analysis; models of comorbidity; extended pedigrees; developmental models; introduction to quantitative trait loci analyses. Hands-on analysis will be emphasized employing networked notebook computers.

An application form can be printed from, and online registration is available at Further information may be obtained from John Hewitt, or the workshop secretary, Kendra Locher, IBG, University of Colorado, Boulder, CO 80309-0447, USA; Telephone: +1 303-735-5440; FAX: +1 303-492-8063; E-mail: John Hewitt, or Kendra Locher

Minority students and scientists are especially encouraged to attend. Partial financial support for US minority participants is available by application to the local host, John Hewitt.

Financial support for this workshop is provided by grant MH19918 from the National Institute of Mental Health. The American Psychological Association's Board of Scientific Affairs is also sponsoring the workshop by disseminating information about it as part of its initiative on Genetics in Psychology.