1 Comparing Indirect Methods of Digit Ratio (2D:4D) Measurement (Running Head: Methods of Digit Ratio Measurement) Christoph J. Kemper & Andreas Schwerdtfeger Johannes Gutenberg-University Mainz, Department of Psychology, Staudingerweg 9, 55099 Mainz, Germany Corresponding author: Christoph J. Kemper Johannes Gutenberg-University Mainz Department of Psychology Staudingerweg 9 55099 Mainz Germany Phone: ++49 (0)6131 392 25 76 Fax: ++49 (0)6131 392 24 83 E-Mail: kemperc@uni-mainz.de This is a preprint of an article published in the American Journal of Human Biology © 2009 Wiley-Liss, Inc. Published in final edited form as: Am J Hum Biol. 2009, 21(2): 188-191. doi: 10.1002/ajhb.20843