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Hi there,

I have been collecting initial data with the above design with a view to updating my priors soon and now have a few follow-on questions – based on a total on n=20 completes so far.

With such a small sample, the results of the experiment are not yet very stable – with each new respondent ...

Hi,
Would it be possible to have an expert check of my syntax.

Design
;alts = alt1*, alt2*, optout
;rows = 36
;eff = (mnl, d)
;block = 3
;model:

U(alt1) = b1.effects[0.000011|0.00001|-0.00001]*FEV[15,5,-5,0] + b2.effects[0.00001]*IVdays[1,0] + b3.effects[0.000011|0.00001]*Abdo[2,1,0] + b4.effects ...

Thank you Michiel.

One further quick question - is there a rule of thumb for minimum number of respondents viewing each block?

In initial pre-pilot work I am getting quite a bit of push back on length. The choice task is fairly complex & ideally I'd like to cut down the number of choice tasks ...

Hi there,

I would appreciate some guidance on choice of design…
Experiment has 7 attributes with between 2 and 4 levels
Limited sample available: <4 to pilot, and sample size ~100 respondents (thinking of blocking into 3 - with respondents seeing 10-12 designs - though the prepilot work I've done ...