including the base category in a simple design

[rb2]

Dear all,

I am new to experimental design and have just recently been using NGENE. I am currently working in the area of education and am looking into students’ willingness to pay for their education provision. I have 6 attributes with various levels. I am trying to use an orthogonal design to develop the questionnaire. However I am a little puzzled as to how to include/code the ‘base category’ or ‘status quo’ option in the design (as this bundle of attributes and their levels is not given as an alternative when the alternatives are reported). Can anyone help with this issue?

Thanks for you time and thanks in advance.

Ray Bachan
University of Brighton
UK

[Andrew Collins]

Hi Ray,

I got your message, and have responded to this as it contains more details.

Regards,
Andrew

[rb2]

Dear Andrew

Thanks for your comments (and time) they have been very useful and have put me on the right track.

Kind Regards

Ray