Hi there,
I'm designing a survey where people need to choose one of three transportation alternatives. Here are the alternatives, their specific factors and the number of levels I intend to use for each
- Mode A:
- Fixed cost: 3 levels: $10.00, $15.00, $20.00
- Variable cost: 3 levels: $0.25, $0.50, $0.75
- No waiting time
- Mode B:
- Fixed cost: 3 levels: $5.00, $15.00, $30.00
- Variable cost: 3 levels: $0.25, $0.50, $0.75
- No waiting time
- Mode C:
- No fixed cost
- Variable cost: 3 levels: $2.00, $3.00, $4.00
- Waiting time: 3 levels: 2min, 5min, 8min
Besides all of this, there is another factor that should be taken into account in the design, which doesn't "belong" to any of the alternatives. It would be something like this:
- Weather condition: 3 levels: sunny, rainy and overcast
Notice how I would have ONE weather condition per choice occasion, not one weather condition PER ALTERNATIVE.
On top of this design, I would also like each respondent to receive only 2 choice occasions (i.e. 2 choice sets per survey).
So, for example, a survey would look somehting like this:
Question 1
When the weather is sunny, which one of these modes would you use?
Mode A: FC=$10.00, VC=$0.75, WT=0min
Mode B: FC=$30.00, VC=$0.50, WT=0min
Mode C: FC=$0.00, VC=$3.00, WT=5min
Question 2
When the weather is rainy, which one of these modes would you use?
Mode A: FC=$15.00, VC=$0.50, WT=0min
Mode B: FC=$5.00, VC=$0.75, WT=0min
Mode C: FC=$0.00, VC=$4.00, WT=2min
It would be great to have around 10 versions of the surey. If that's the case, I expect to have about 100 respondents per survey.
Is there any way to do this in JMP? All I have seen in the "Choice Design" module is for alternatives that share EXACTLY the same attributes and levels. I also haven't found where to indroduce "outside" variables that don't belong to any particular alternative, but still affect people's choices (such as Weather condition).
How would I go about building an experiment like this using JMP?
Thank you!
Kind regards,
Felipe
