Search found 3 matches

by Lily820
Wed Aug 08, 2018 2:05 pm
Forum: General questions about choice experiments
Topic: No interaction term in design but like to do in analysis?
Replies: 3
Views: 12648

No interaction term in design but like to do in analysis?

Dear Ngene team,

I have done a D-efficient design using Ngene for my study and I am doing data analysis part.

One question: if I did not specify interaction terms in my utility function used for experimental design, can I still include the interaction terms in MNL models? Any mistake or possible ...
by Lily820
Sat Aug 05, 2017 1:43 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: Eval command to re-block
Replies: 4
Views: 9721

Re: Eval command to re-block

Thanks Andrew.

This works! Excellent! Thank you so much! Now I got 40 blocks instead of original 20 blocks within the original design.

May I ask one more question?

Since the original design is efficient not orthogonal, so blocking here actually cannot ensure attribute level balance right? So ...
by Lily820
Tue Aug 01, 2017 10:02 am
Forum: Support for Ngene Desktop (v1.x)
Topic: Eval command to re-block
Replies: 4
Views: 9721

Eval command to re-block

Hi,

This is my original design with 20 blocks with 10 choice sets in each block. Now we would like to reduce the number of choice sets in each block such as only five. Then we will need 40 blocks instead of 20. Can I just use eval command to achieve this? Will eval command generate the new choice ...