Document Detail

Temporal bisection in 4-month-old infants.
MedLine Citation:
PMID:  20804277     Owner:  NLM     Status:  In-Data-Review    
The present study was the first to investigate infants' ability to discriminate time using a bisection task that has been extensively used with animals and human adults. Infants aged 4 months were presented with two standard auditory signals, one short (S = 500 ms) and one long (L = 1,500 ms), and were trained either to look to the left after S and to the right after L, or vice versa. During the test phase, the infants were then presented with intermediate durations without reinforcement as well as the two reinforced standard durations, for which the reinforcement was either immediate or delayed of 3 s. The times spent by the infants looking to the right, left or away from the target after the stimulus duration were coded by two blind coders. The results revealed an orderly psychophysical function with the proportion of long responses increasing with signal duration. The point of subjective equality (Bisection Point) was closer to the geometric mean of the short and long standard duration than to their arithmetic mean. Modeling using the scalar timing models revealed that our infants had a relatively high sensitivity to time but that their temporal performance was affected by the fact that they made a large number of random responses. The development of the perception of time is discussed in the light of similarities and differences in temporal bisection performance between different species (rats and humans) and the different levels of development observed within a given species. (PsycINFO Database Record (c) 2010 APA, all rights reserved).
Joëlle Provasi; Anne-Claire Rattat; Sylvie Droit-Volet
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of experimental psychology. Animal behavior processes     Volume:  37     ISSN:  1939-2184     ISO Abbreviation:  J Exp Psychol Anim Behav Process     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2011-02-08     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7504289     Medline TA:  J Exp Psychol Anim Behav Process     Country:  United States    
Other Details:
Languages:  eng     Pagination:  108-13     Citation Subset:  IM    
Laboratoire CHArt.
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