Dear all,
I'm setting up a customer research using a conjoint analysis (SPSS) and have a few questions.
1. Do I need to set up the syntax file before collecting answers or can I do that afterwards?
2. Is there a way to change the orthogonal design (in SPSS) after I've run it? Or do I have to punch in the values all over again everytime I want to add/remove a level or factor?
3. Currently, when running the orthogonal design I get 16 cards (3-4 factors, 2-5 levels). Unfortuately, this is too many for the subjects to rate (I'm thinking of running a ratings-based conjoint). I realize that I will loose statistical power by reducing the cards,
a) but if I clear some cards from the data view, will that "screw up" my running the analysis?
b) Is there a way to force SPSS to only create an X number of cards maximum?
Thanks very much in advance!
I'm setting up a customer research using a conjoint analysis (SPSS) and have a few questions.
1. Do I need to set up the syntax file before collecting answers or can I do that afterwards?
2. Is there a way to change the orthogonal design (in SPSS) after I've run it? Or do I have to punch in the values all over again everytime I want to add/remove a level or factor?
3. Currently, when running the orthogonal design I get 16 cards (3-4 factors, 2-5 levels). Unfortuately, this is too many for the subjects to rate (I'm thinking of running a ratings-based conjoint). I realize that I will loose statistical power by reducing the cards,
a) but if I clear some cards from the data view, will that "screw up" my running the analysis?
b) Is there a way to force SPSS to only create an X number of cards maximum?
Thanks very much in advance!