Processes involved in tempo perception: a CNV analysis
Psychophysiology. 2003-01-01; 40(1): 69-76
DOI: 10.1111/1469-8986.00008
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Pfeuty M(1), Ragot R, Pouthas V.
Author information:
(1)Neurosciences Cognitives et Imagerie Cérébrale, LENA-CNRS, Hôpital
Salpêtriére, 75651 Paris Cedex 13, France.
The purpose of this research was to study the mechanisms underlying tempo
perception, by looking at their electrophysiological brain correlates. The
subjects’ task consisted of comparing the tempos of two isochronous tone
sequences made up of either three (condition 13) or six (condition 16) 600-ms
intervals. Contingent negative variation (CNV), known to be linked to the
judgment of a single interval, kept increasing in amplitude for three intervals
during tempo encoding, thereby providing evidence of the occurrence of CNVs also
for several intervals in succession. This CNV increase could reflect the use of
interval-based processes in the building of the interval memory trace. During
the comparison phase, a CNV decrease was observed in condition 16, suggesting
that subjects did not build a new memory trace, but used beat-based processes to
check whether the beats of the new tempo occurred at the times they anticipated.
DOI: 10.1111/1469-8986.00008
PMID: 12751805 [Indexed for MEDLINE]