Comparison of Odor Thresholds obtained by a Three Alternative Choice Procedure and by the Method of Limits

Research output: Contributions to collected editions/worksArticle in conference proceedingsResearch


50 healty normosmic students obtained odor thresholds for butanol using the Sniffin` Stickstest (SnS), as well as the method of limits (ML) in ascending and descending order. The procedureswere repeated about 2 weeks later. For each session and method the performancetime was taken and subjects rated the pleasantness of the odor and the strain required by thetask using a category anchored Visual Analogue Scale. For all subjects plausible thresholdscould be obtained by the SnS procedure and by the ascending ML. For 22 out of 50 subjects,however, thresholds could not be obtained by the descending ML. Further analysis of the datarevealed worse performance and significantly lower retest-reliabilities for those subjects inthe ascending ML and the SnS-procedure as well.
Original languageEnglish
Title of host publicationFechner Day 2009 : Proceedings of the 25th Annual Meeting of the International Society for Psychophysics
EditorsM. A. Elliott, S. Antonijevic´, S. Berthaud, P. Mulcahy, B. Bargary, C. Martyn, H. Schmidt
Number of pages4
Place of PublicationGalway (Irland)
PublisherInternational Society for Psychophysics
Publication date2009
Publication statusPublished - 2009
EventAnnual Meeting of the International Society for Psychophysics - FD 2009: Fechner Day - Galway, Ireland
Duration: 21.10.200924.10.2009
Conference number: 25