A comparative analysis of different procedures for measuring speech recognition threshold  

Podlesek A., Komidar L., Brezovar S., Smodiš K., Rus J.
First author's affiliation: Department of Psychology, Faculty of Arts, University of Ljubljana, Ljubljana, Slovenia

In Slovenia, the adapted Freiburg Monosyllabic Word Test has been used to assess speech recognition threshold (SRT). The aim of our study was to compare several adaptive procedures with the Freiburg Test. Based on the analysis of comprehensibility and commonness of stimuli used in the Freiburg Test, we selected the most appropriate words for use in three adaptive procedures: two variants of a descending procedure, both recommended by the ISO 8523-3 standards for measuring SRT, and the staircase method. On a normal-hearing sample (N = 36 in test measurement and N = 24 in retest measurement), comparable SRTs were obtained with the adaptive procedures, whereas the Freiburg Test yielded slightly higher SRTs. This could be attributed to a non-optimal pool of words used in the classical version of the Freiburg test: When the selected stimuli were used in the Freiburg test, the results were similar to the ones obtained with the adaptive methods. The methods also showed moderate reliability. We conclude that adaptive methods can be validly used instead of the Freiburg test for measuring SRT. The poster will also present the first step in developing a new base of monosyllabic words, which will be more representative of contemporary Slovenian language than the present base.