## 2 Replies to “Likert scales”

1. Marion says:

Does a Likert scale have to have odd number of choices? (i.e. the choices I’ve seen so far are always in scales of 3, 5, 7)

1. Alec Fearon says:

No. The wikepedia article explains it thus:
‘Likert scaling is a bipolar scaling method, measuring either positive or negative response to a statement. Sometimes an even-point scale is used, where the middle option of “Neither agree nor disagree” is not available. This is sometimes called a “forced choice” method, since the neutral option is removed. The neutral option can be seen as an easy option to take when a respondent is unsure, and so whether it is a true neutral option is questionable. It has been shown that when comparing between a 4-point and a 5-point Likert scale, where the former has the neutral option unavailable, the overall difference in the response is negligible.’ That last point cites Armstrong (1987).

Reference:
Armstrong, Robert (1987). “The midpoint on a Five-Point Likert-Type Scale”. Perceptual and Motor Skills: Vol 64, pp359-362.