Running head: Time to contact Running head: Time to contact A STEP BY STEP APPROACH TO RESEARCH ON TIME TO CONTACT AND TIME TO PASSAGE D. Regan 1,2 and R. Gray 3 1. Center for Vision Research, Dept. of Psychology BSB Rm. 375, York University, 4700 Keele St., North York, Ontario, M3J 1P3, Canada 2. Author for correspondence 3. Dept of Applied Psychology, Arizona State University, 7001 E. Williams Field Road, Mesa, AZ 85212