Does the software use these methods as well for best-worst?

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Does the software use these methods as well for best-worst?

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Yes, Sabrina, it is. The analysis is the same for best-worst CBC only the design matrix is modified.

What do you mean with design matrix? Is it the matrix of variances and covariances of the multivariate normal distribution?

No, the design matrix is the matrix that describes the concepts and the choice sets. It has as many rows as there are concepts x choice sets x respondents. Each row has a description of the concept (columns are effects-coded) plus a response variable indicating whether it was chosen or not.

In Best-Worst we double the tallness of that matrix by stacking beneath it a negatively coded (all columns for effects-coded concept descriptions multiplied by -1) matrix plus response indicators for the items selected as worst.

In Best-Worst we double the tallness of that matrix by stacking beneath it a negatively coded (all columns for effects-coded concept descriptions multiplied by -1) matrix plus response indicators for the items selected as worst.

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