@article {WanKinLau07, title = {Anchors: Software for Anchoring Vignettes Data}, journal = {Journal of Statistical Software}, volume = {42}, number = {3}, year = {2011}, pages = {1--25}, abstract = {When respondents use the ordinal response categories of standard survey questions in different ways, the validity of analyses based on the resulting data can be biased. Anchoring vignettes is a survey design technique intended to correct for some of these problems. The anchors package in R includes methods for evaluating and choosing anchoring vignettes, and for analyzing the resulting data.}, url = {http://www.jstatsoft.org/v42/i03/}, author = {Jonathan Wand and Gary King and Olivia Lau} }