Title
How to measure the onset of babbling reliably? How to measure the onset of babbling reliably?
Author
Faculty/Department
Faculty of Arts. Linguistics and Literature
Publication type
article
Publication
London ,
Subject
Psychology
Linguistics
Source (journal)
Journal of child language. - London, 1974, currens
Volume/pages
39(2012) :3 , p. 523-552
ISSN
0305-0009
1469-7602
ISI
000303892100003
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Various measures for identifying the onset of babbling have been proposed in the literature, but a formal definition of the exact procedure and a thorough validation of the sample size required for reliably establishing babbling onset is lacking. In this paper the reliability of five commonly used measures is assessed using a large longitudinal corpus of spontaneous speech from forty infants (age 0 ; 6−2 ; 0). In a first experiment it is shown that establishing the onset of babbling with reasonable (95%) confidence is impossible when the measures are computed only once, and when the number of vocalizations are not equal for all children at all ages. In addition, each measure requires a different minimal sample size. In the second experiment a robust procedure is proposed and formally defined that permits the identification of the onset of babbling with 95% confidence. The bootstrapping procedure involves extensive resampling and requires relatively few data.
E-info
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