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Titre du document / Document title

Speeding up and (…relatively…) slowing down an internal clock in humans

Auteur(s) / Author(s)

WEARDEN J. H. (1) ; PHILPOTT K. (1) ; WIN T. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Department of Psychology, University of Manchester, Oxford Road, Manchester M13 9PL, ROYAUME-UNI

Résumé / Abstract

Two experiments used click-trains to manipulate the subjective duration of stimuli they preceded, in attempts to demonstrate relative slowing down of the pacemaker of a a hypothesized internal clock. Experiment 1 used a pair comparison procedure, where two tones presented on each trial in fact had the same duration. In the conditions of particular interest, the first tone was preceded by clicks (thus putatively timed with a faster clock), the other presented without (thus timed normally). The reverse condition (no-clicks/clicks) was also used. Judgements of the relative duration of the stimuli were shifted in both directions (i.e. first tone longer than second and vice versa) by the manipulation, consistent with relative speeding up and slowing down of the pacemaker. Experiment 2 used the popular bisection method, with 200- and 800-ms tones used as the Short and Long standards for the task. After standard presentations, subjects were required to classify a range of comparison stimuli (from 200 to 800 ms in 100-ms steps) in terms of their similarity to one or the other of the standards. In one condition the comparison stimuli were preceded by clicks (thus timed fast') and the standards were presented without clicks (thus timed normally'); in another condition the clicks preceded the standards but not the comparisons. The psychophysical function obtained from the bisection procedure shifted in opposite directions with the different manipulations, consistent with both relative 'speeding up' and slowing down' of the pacemaker of the internal clock.

Revue / Journal Title

Behavioural processes    ISSN  0376-6357   CODEN BPRODA 

Source / Source

1999, vol. 46, no1, pp. 63-73 (31 ref.)

Langue / Language

Anglais

Editeur / Publisher

Elsevier, Amsterdam, PAYS-BAS  (1976) (Revue)

Mots-clés anglais / English Keywords

Time perception

;

Acceleration

;

Slowing down

;

Acoustic stimulus

;

Classification

;

Experimental study

;

Human

;

Cognition

;

Mots-clés français / French Keywords

Perception temps

;

Accélération

;

Ralentissement

;

Stimulus acoustique

;

Classification

;

Etude expérimentale

;

Homme

;

Cognition

;

Mots-clés espagnols / Spanish Keywords

Percepción tiempo

;

Aceleración

;

Disminución velocidad

;

Estímulo acústico

;

Clasificación

;

Estudio experimental

;

Hombre

;

Cognición

;

Localisation / Location

INIST-CNRS, Cote INIST : 17558, 35400008524549.0060

Nº notice refdoc (ud4) : 1789764



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