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How to measure the onset of babbling reliably?
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| Abstract |
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| 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. | |
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English
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| Source (journal) |
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Journal of child language. - London, 1974, currens |
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London : 2012
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| ISSN |
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0305-0009 [print]
1469-7602 [online]
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| Volume/pages |
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39:3(2012), p. 523-552
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| ISI |
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000303892100003
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