Quote:
Originally Posted by John
There also are quite possibly some psychological effects that I have not accounted for. Do the numbers on the scale themselves affect how we vote? If given a poll, 1-5, and the average is 4, does this imply that if the same poll was conducted on a scale from 1-9, the average would be 7? This would be expected if people simply scaled their votes linearly (or at least, linearly on average) but that may not be the case.
If we remap the entire scale
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I have never found a study that confirms this, but I have heard it suggested that the widespread practice of using 75 as the 'center' of a 100 point grading scale in US schools has predisposed the people who attended those schools to center their rating on 75%, rather than on 50%. I feel that the most significant thing FIRST did correctly for this survey question was specifying a center, which I imagine would at least slightly help to fix that bias.