Ralph and Lyn Haber are the Principals of Human Factors Consultants. Ralph is Professor Emeritus of Psychology, University of Illinois at Chicago. He has a Ph.D. in Psychology from Stanford University. Lyn has a Ph.D. in Linguistics from University of California, Berkeley. Both are Research Associates in the Department of Psychology, University of California at Santa Cruz. Ralph has testified in pre-trial hearings and trials on the limitations of fingerprint evidence.