Rayzorblades wrote at
19 Aug 2011 03:12 PM GMT: The logical mind in me tells me you'd have the best results with a numerical scale.
A lot of the time it varies from person to person. One person's 90 might be anther person's 70, or they might have completely contradictory data based on how that person interprets it.
Sadly there is no empirical measuring standards for this type of thing.
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