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Thank you, Michiel.
That has been useful.

Hi Michiel,
Thanks I understand. The reason I think it might be impractical to include the interactions is that by adding them to both utility functions I would increase the number of parameters I am trying to estimate, ie increase the number of rows, blocks and therefore my sample size.

Could you ...

Hi Michael,
Thank you. I changed my utility functions to include alternative-specific coefficients.

V1 = (Int +
cv_event_int*cv_int +
cv_eventAge*cv_int*age +
cv_eventBasel*cv_int*basebp +
cv_eventMulti*cv_int*multi +
fall_int*fall_int +
fallAge*fall_int*age +
fallSoc*fall_int*sochx ...

Thank you Michiel,

below are my utility functions. I omitted the Beta for the interactions from the above post to keep it simple.

V1 = (Int +
cv_event*cv_int + cv_eventAge*cv_int*age +
cv_eventBasel*cv_int*basebp +
cv_eventMulti*cv_int*multi +
fall*fall_int +
fallAge*fall_int*age +
fallSoc ...

Dear Michiel,

I was hoping to get some advice on the results of my pilot study (n=12).

1. The size and sign of the coefficient for the dummy coded variable social history is unusual. My result suggests that the likelihood of a clinician choosing a more intensive medication regime would be ...

Hi Michiel,
I think I have it now, I would appreciate your review.
I am trying to quantify the weight of attributes that influence a choice to prescribe BP medicines to an intensive target of <120mmHg or a standard target of 120-140mmHg.

My (2) labelled alternatives are; intensive, standard
I ...

Hi Michiel,

Thanks again for all your help.
I tried to follow your advice. My alternatives are labelled.
I added age, condition and social hx as scenario variables and following the instructions in section 8.5 I added code to force the scenario variables to be the same for both alternatives.

I ...

HI Michiel,

Thank you. Your solution looks great.
That would work for my question. I am trying to figure out how to format it in Ngene but am having problems. I added the background to the scenario, but I am not sure how to present the alternatives to design a choice like you have described.

Here ...

Hi Michiel,

My question requires some context.
I understand using choice experiments to determine the value participants place on certain elements of a choice, and for that reason, there needs to be at least 2 choices.
To explain my question a bit better, I will tell you about my project. I would ...

Hi,

I was wondering about presenting one scenario of a DCE choice at a time.

For example, rather than having 2 scenarios side by side with 2 treatment alternatives, each element of the scenario is presented one at a time with the 2 treatment alternatives.