At 11:13 AM +0200 9/26/02, Jan Malte Wiener wrote: >hi, >I have data that i do not exactly know how to statistically analyze: > >subjects are repeatedly asked to make a decision (e.g. left-right -> >coded as 0 or 1). i have 20 subjects, each subject made 8 decisions. > >i now want to analyse whether my experimental manipulation induced a >systematic bias in subjects answers. if that wasn't true i expected a >chance level of 0.5 (50% left, 50% right).
This seems highly suspect to me. What reason is there to think people would decide between left and right 50/50? It isn't a case of flipping a perfectly balanced coin. We have hard-wired biases here, so to speak. I think you need a control group to identify the proportion in an un-treated/-manipulated situation. ________________________________ Jill Binker Fathom Dynamic Statistics Software KCP Technologies, an affiliate of Key Curriculum Press 1150 65th St Emeryville, CA 94608 1-800-995-MATH (6284) [EMAIL PROTECTED] http://www.keypress.com http://www.keycollege.com __________________________________ . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
