The tau-equivalent model can describe the joint behaviour of multiple test items measuring the same subjective probability. In this paper we stress the use of confidence intervals to assess reliability, as this allows for a more critical assessment of the items as measurement instruments. To ...
(2012). A weighted version of the tau-equivalent model of measurement for items with ordered response categories. International Journal of Statistics and Probability, 1, 151-163. http://dx.doi.org/10.5539/ijsp.v1n2p151Schweizer, K. (2012a). A weighted version of the tau-equivalent model ...
Unidimensionality of three-item scales can be examined with a tau-equivalent model that has some favorable psychometric properties. However, it might be exceedingly restrictive in certain practical cases. When developing a new short scale, it is recommended to maintain at least four items....