Weber fractions and time-order errors for long and short durations: implications for modeling
2013 (English)In: Fechner Day 2013: Proceedings of the 29th Annual Meeting of The International Society for Psychophysics / [ed] Jiˇr´ı Wackermann, Marc Wittmann, Wolfgang Skrandies, Freiburg, 2013, 28-28 p.Conference paper, Abstract (Other academic)
Using a weighted up-down procedure, in each of eight conditions 28 participants compared durations of auditory (noise bursts) or visual (LED flashes) intervals; filled or unfilled with 3-ms markers; with or without feedback. Standards (Sts) were 100 and 1000 ms, and the ISI 900 ms. Intermixedly, presentation orders were St-Comparison (Co) and Co-St. TOEs were positive for St=100-ms and negative for St=1000 ms. Weber fractions (WFs, JND/St) were lowered by feedback. For visual-filled and visual-empty, WFs were highest for St=100 ms. For auditory-filled and visual-empty, St interacted with Order: lowest WFs occurred for St-Co with St=1000 ms, but for Co-St with St=100 ms. Lowest average WFs occurred with St-Co for visual-filled, but with Co-St for visual-empty. The results refute the generalization of better discrimination with St-Co than with Co-St (”type-B effect”), and support the notion of sensation weighting: flexibly differential impact weights of the compared durations in generating the response.
Place, publisher, year, edition, pages
Freiburg, 2013. 28-28 p.
, Fechnerday Proceedings
duration discrimination, time-order errors
Research subject Psychology
IdentifiersURN: urn:nbn:se:su:diva-97260OAI: oai:DiVA.org:su-97260DiVA: diva2:676340
Fechner Day 2013: The 29th Annual Meeting of The International Society for Psychophysics, Freiburg, Germany, October 21-25, 2013