No consensus appears to exist as to how long physically a graphic rating scale should be. The present study found no statistical evidence of perceptual distortion in information collected with continuous rating scales of lengths 75 mm, 100 mm, and 125 mm, so such scales seem robust to variations in line length.
ChurchillG. A., & PeterJ. P. (1984) Research design effects on the reliability of rating scales: a meta-analysis.Journal of Marketing Research, 21, 360–375.
3.
CoxE. P. (1980) The optimal number of response alternatives for a scale: a review.Journal of Marketing Research, 17, 407–422.
4.
DillonW. R., MaddenT. J., & FirtleN. H. (1987) Marketing research in a marketing environment.St. Louis, MO: Times Mirror; Mosby College Publ.
5.
FriedmanL. W., & FriedmanH. H. (1986) Comparison of itemized vs graphic rating scales: a validity approach.Journal of the Market Research Society, 28, 285–289.
6.
GarnerW. R. (1960) Rating scales, discriminability, and information transmission.Psychological Review, 67, 343–352.
7.
GriggA. O. (1980) Some problems concerning the use of rating scales for visual assessment.Journal of the Market Research Society, 22, 29–43.
8.
McKelvieS. J. (1978) Graphic rating scales: how many categories?British Journal of Psychology, 69, 185–202.
