Converting survey results from four-point to five-point scale: a case study

AbstractThe objective of this paper is to report the result of a case study on converting survey results from a four-point scale to a five-point scale and to discuss the method used for this conversion. The case work in this paper originated from a request by a pharmaceutical company to find a way to compare its survey results, which were on a four-point scale, to other survey results, which are on a five-point scale. The results of the study, as well as the data, are reported.