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Time- and space-order effects in stimulus comparison in the light of response-time data
Stockholm University, Faculty of Social Sciences, Department of Psychology.
2008 (English)In: Fechner Day 2008: Proceedings of the 24th Annual Meeting of the International Society for Psychophysics, 2008, 139-144 p.Conference paper, Published paper (Refereed)
Abstract [en]

As has been found experimentally, magnitude comparison of paired successive or simultaneous stimuli can be described as being based on differential subtractive weighting of the stimulus-induced sensations ψ1 and ψ2, causing time- and space-order effects (TOEs and

SOEs). In the simplest case, the comparison equation becomes: d = s1 (ψ1 - ψr) - s2 (ψ2 - ψr), where ψr is the reference level (ReL). New analyses of response-time data from stimulus comparison experiments (Hellström, 2003) show that signed response speed, the inverse of response time with the sign of the subjective difference d, carries similar information on d as measures based on transformed proportions of "1st greater," "equal," and "2nd greater" responses. Sensation weighting is similar for fast and slow responses, which suggests that it arises in a preceding processing stage, and strengthens the notion that the weighting, and thereby TOEs and SOEs, is of perceptual origin.

Place, publisher, year, edition, pages
2008. 139-144 p.
Keyword [en]
stimulus comparison, time-order effect, space-order effect, response time, sensation weighting
National Category
Psychology
Identifiers
URN: urn:nbn:se:su:diva-16360OAI: oai:DiVA.org:su-16360DiVA: diva2:182880
Available from: 2008-12-17 Created: 2008-12-17Bibliographically approved

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