Rating Scales Used Online
Rating scales are used widely online in an attempt to provide indications of consumer opinions of products. Examples of sites which employ ratings scales are IMDb, Epinions.com, Internet Book List, Yahoo! Movies, Amazon.com, BoardGameGeek, TV.com and Ratings.net. The Criticker website uses a rating scale from 0 to 100 in order to obtain "personalised film recommendations".
In almost all cases, online rating scales only allow one rating per user per product, though there are exceptions such as Ratings.net, which allows users to rate products in relation to several qualities. Most online rating facilities also provide few or no qualitative descriptions of the rating categories, although again there are exceptions such as Yahoo! Movies, which labels each of the categories between F and A+ and BoardGameGeek, which provides explicit descriptions of each category from 1 to 10. Often, only the top and bottom category is described, such as on IMDb's online rating facility.
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