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anchored maxdiff

good afternoon,
I did a maxdiff experiment anchored in the lighthouse and when evaluating the data, verify that when averaging the stipulated values ​​I do not reach the value 100, which occurs when we do not use the anchor.
My experiment has 11 sets, 11 attributes and 4 attributes for sets. And there were 243 respondents, I would like to know if there is any procedure to be done such as calibration or perhaps an error in the designer.
asked Jul 28, 2020 by suzicristiny (120 points)

1 Answer

0 votes
The scores are no longer intended to sum to 100 under zero-anchored interval scaling.  Here's a snippet from the documentation:

Zero-Anchored Interval Scores

If you have used Anchored MaxDiff, scores are displayed where the anchor threshold is set to 0.  The zero-anchored interval scores are normalized to have a range of 100 utility points.  Positive scores are associated with items judged above the anchor threshold; negative scores are associated with items judged below the anchor threshold.
answered Jul 28, 2020 by Bryan Orme Platinum Sawtooth Software, Inc. (200,340 points)