Thanks for your answer Doug, That reassures me :-). Just one more thing, could you give me the references of the main MonteCarlo studies you were alluding to ?
I Thank you in advance. Best, Arnaud Trollé. ----- Original Message ----- From: J. Douglas Carroll To: [email protected] Sent: Monday, March 26, 2007 7:39 PM Subject: Re: Dissimilarity data obtained from 7-category scale & INDSCAL ? Yes, no problem. INDSCAL and its variant for the symmetric case of three-way proximity data called SINDSCAL (written by Sandra Pruzansky, and much more user friendly than the original INDSCAL program written by Jih-Jie Chang) is quite often used with ordinal scale data, with results that are very successful-- as shown in a number of Monte Carlo studies. Best, Doug Carroll At 08:16 AM 3/26/2007, Arnaud Trollé wrote: Hello, I've got a doubt about the following point : I have used Indscal in order to process dissimilarity data directly obtained from a pairwise comparison test during which judgments were produced on a seven-category scale labelled from '0' to '6' (very similar to very dissimilar). To my knowledge, one condition to use Indscal is to have at one's disposal dissimilarity data of metric level (interval level or ratio level); the subjects were told to consider the category-scale as metric (e.g. a rating equal to '4' implies stimuli twice more different than a rating equal to '2'), an a posteriori check of this assumption (using the successive interval method) was first carried out. But as far as this assumption is shown acceptable, is it sufficient to be able to process this kind of data with Indscal ? Can anyone help me to dispel this doubt ? Many thanks. Arnaud. ---------------------------------------------- CLASS-L list. Instructions: http://www.classification-society.org/csna/lists.html#class-l ###################################################################### # J. Douglas Carroll, Board of Governors Professor of Management and # #Psychology, Rutgers University, Graduate School of Management, # #Marketing Dept., MEC125, 111 Washington Street, Newark, New Jersey # #07102-3027. Tel.: (973) 353-5814, Fax: (973) 353-5376. # # Home: 14 Forest Drive, Warren, New Jersey 07059-5802. # # Home Phone: (908) 753-6441 or 753-1620, Home Fax: (908) 757-1086. # # E-mail: [EMAIL PROTECTED] # ###################################################################### ---------------------------------------------- CLASS-L list. Instructions: http://www.classification-society.org/csna/lists.html#class-l ---------------------------------------------- CLASS-L list. Instructions: http://www.classification-society.org/csna/lists.html#class-l
