Sequential pairs of choices

[jshep]

Hi Michiel,

I'm in the process of designing a stated choice scenario that involves 2 choice options at a point in time, followed by a further 2 choice options later in the day.

All the options have the same attributes and attribute levels. In some cases respondents will have to choose one of the initial 2 choices, in other cases they can choose from across the 4, so the pairs of choice options are not independent.

I'd like to ensure attribute level balance and to avoid dominated choices across all 4 options, but also within each pair. Do you have any tips on a good way to do this?

Any advice would be appreciated!

Best regards,

James