The rating scale in 360 degree feedback can be oddly contentious. Everyone has an opinion. Here is our view based on a lot of experience (which of course makes us right !)
How many rating points?We recommend as few as possible.
Keep it simple. Our standard scale would be 3 points plus 'not applicable'. So; Strength, Competent, Development Area would be a great scale. We work with longer scales but we find that they add complexity more than they provide information.
Should there be a middle point?Yes.
We know the fear - everyone will score in the middle (the Veblen effect). But they don't - really, they don't. And often people have a "she's fine", "ambivalent", "mixed feelings" type
response that they want to give. Forcing them to go positive or negative creates a false response.
Is “not applicable” allowed?Yes.
You might call it something else : "no evidence"? But in 30 or so questions we have to expect some people to just not know. Now - most importantly, you should review the responses to questions to ensure that questions are not overloaded with N/A responses - or that one group of respondents are answering in this way. If they are then the question requires rewording or removing.
The words : We favour scales such as "Strength", "Development Area" rather than "Often","Sometimes".
The latter scale, citing frequency, are however effective and really this is just personal preference. I find that the behaviours read better as a statement rather than as a question and this fits with a statement based rating scale. What I would avoid at all costs is
a numerical rating scale.
Overall thoughtsThe rating scale in 360 degree feedback is less important than people make it - I believe that respondents look at it initially to get a feel for where to place their mark but really they are providing graduated feedback more than specific.
When debriefing though you do tend to use the rating scale as part of the language - and for that reason we concentrate on how the report will look when we are designing the rating scale rather than how it appears in the questionnaire.
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Brendan