Abstract
Measuring fuzziness: Cross Modality Matching. When subjects estimate physical intensities by indirect methods, as in cross modality matching, their responses show an imprecise perception of the physical world. Fuzzy set theory san represent this type of uncertainty. Starting with the definition of a fuzzy set given by Zadeh (1965) our goal in chic work is to obtain a characteristic or membership function from cross modality matching data. A similar procedure has been used in Garriga (1989a) for magnitude estimation data. As in this case the modelization san be used to study between and within subjects responses and also to compare different psychophysical methods. Starting with auditory stimuli, observers represent physical magnitudes using line length estimation. These magnitudes are fitted to the model.
