Change search
ReferencesLink to record
Permanent link

Direct link
Weber fractions and time-order errors for long and short durations: implications for modeling
Stockholm University, Faculty of Social Sciences, Department of Psychology.
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)
Abstract [en]

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
Keyword [en]
duration discrimination, time-order errors
National Category
Research subject
URN: urn:nbn:se:su:diva-97260OAI: diva2:676340
Fechner Day 2013: The 29th Annual Meeting of The International Society for Psychophysics, Freiburg, Germany, October 21-25, 2013
Available from: 2013-12-05 Created: 2013-12-05 Last updated: 2014-07-08Bibliographically approved

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Hellström, Åke
By organisation
Department of Psychology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 22 hits
ReferencesLink to record
Permanent link

Direct link