Choosing the Number of Categories in Agree–Disagree Scales

Primary conclusion:

This article shows that if researchers want to use AD scales, they should offer 5 answer categories rather than 7 or 11, because the latter yield data of lower quality.

Reference

Melanie A. Revilla, Willem E. Saris, Jon A. Krosnick “Choosing the Number of Categories in Agree–Disagree Scales” (2013) DOI: 10.1177/0049124113509605

@Article{revilla2013,
  title = {Choosing the Number of Categories in Agree–Disagree Scales},
  volume = {43},
  issn = {1552-8294},
  url = {http://dx.doi.org/10.1177/0049124113509605},
  doi = {10.1177/0049124113509605},
  number = {1},
  journal = {Sociological Methods &amp; Research},
  publisher = {SAGE Publications},
  author = {Revilla, Melanie A. and Saris, Willem E. and Krosnick, Jon A.},
  year = {2013},
  month = {dec},
  pages = {73–97}
}