Net Promoter Score is a Misnomer
Posted by Jeffrey Henning on Thu, Aug 27, 2009
One of my frustrations with the
Net Promoter Score is that the analyst is supposed to interpret the question differently than the respondent. The
respondent is asked a unipolar question, measuring the single dimension of likelihood to recommend an organization:
The
analyst, however, is told to interpret this as a
bipolar scale: likelihood to promote vs. likelihood to detract. A respondent who says they are “Not at all likely” to recommend is treated as a detractor, as is a respondent who says they are moderately likely to recommend (rating of 6). The absurdity of this interpretation is made clear when you ask follow-up questions to the respondents that assume this interpretation.
- Why are you likely to recommend against our company? [Asked only of so-called “detractors”]
- “I am not in a position to recommend or not: 5 was neutral so why do I have this question to answer?”
- “That’s not what I said.”
- “I'm never in the position [to recommend].”
- Why are you only somewhat likely to recommend our company? [Asked only of “passives”]
- “A 7 on a scale of 10 is good! Depends on the person's needs.”
- “It is unlikely I would be asked for a recommendation.”
- “Because you made me answer this question before I could finish the survey.”
Since the Net Promoter Scale doesn’t actually ask about detracting behavior, it should not be interpreted as a “net” of promoters minus detractors; at best, it can be interpreted as a Net Very-Likely-to-Recommend Score.
How likely is it that you would recommend us or recommend against us to a friend or colleague?
- Extremely likely to recommend against
- Moderately likely to recommend against
- Slightly likely to recommend against
- Neither likely to recommend nor recommend against
- Slightly likely to recommend
- Moderately likely to recommend
- Extremely likely to recommend
So this is one of the rare examples where a bipolar scale is more appropriate than a unipolar scale. That said, the suggestion above is a verbose, confusing question for many respondents. If a client really wants a promoter/detractor segmentation, I do use this question, but otherwise I use a unipolar likely-to-recommend question and steer my client to richer segmentation schemes instead.