Subject: Re: need MDS discussion From: Colette Mckay <C.M.Mckay(at)ASTON.AC.UK> Date: Mon, 4 Apr 2005 12:26:56 +0100Not a reference but some experience: With cochlear implantees, we once tried the triadic comparison method (where you either play three sounds and ask which were the most similar and which were the most different, or you play the three possible pairs and ask the same questions). We found that they found the task very confusing. We therefore went (successfully) to the method of playing single pairs and asking them to rank the difference along a line from most-different to most-similar. Of course the latter method requires the subjects to familiarise themselves with the stimuli before starting, and some practice in the task. Colette McKay ************************************************ Colette McKay Professor in Auditory Science Neuroscience Research Institute Aston University Aston Triangle, Birmingham, B4 7ET email: c.m.mckay(at)aston.ac.uk Phone +44 (0)121 204 4099 Fax +44 (0)121 204 3886 ************************************************ -----Original Message----- From: AUDITORY Research in Auditory Perception [mailto:AUDITORY(at)LISTS.MCGILL.CA] On Behalf Of beaucham Sent: 02 April 2005 00:13 To: AUDITORY(at)LISTS.MCGILL.CA Subject: [AUDITORY] need MDS discussion We are looking into doing a multidimensional scaling test on a group of sounds and would like to read about the pros and cons of using subject rating of the similarity of pairs of sounds (e.g., on a 0 to 10 scale) vs. judging which of two pairs presented in rapid succession is most similar. Please let me know if you know of a reference which discusses this point. Jim Beauchamp Univ. of Illinois at Urbana-Champaign jwbeauch(at)uiuc.edu