Children as young as 19 months understand different dialects

May 06, 2009

We are surrounded by a multitude of different accents every day. Even when a speaker of another English dialect pronounces words differently than we do, we are typically able to recognize their words. Psychologist Catherine Best from MARCS Laboratories, University of Western Sydney, along with colleagues from Haskins Laboratories and Wesleyan University, report a ground-breaking study on the early development of this cross-dialect skill, which they term "phonological constancy."

In this experiment, 15- and 19-month-old American toddlers looked at a colored checkerboard on a monitor in order to hear sets of familiar words or unfamiliar words. They completed two tests, one with their own American dialect, and the other with a Jamaican English dialect.

The results, described in Psychological Science, a journal of the Association for Psychological Science, suggest that phonological constancy is already evident by 19 months of age, but is not yet present at 15 months. Both ages listened longer to familiar words than to unfamiliar words in the American dialect, indicating they recognize and prefer words they know. But the 15-month-olds failed to show this preference for the Jamaican dialect, suggesting poor recognition of Jamaican-accented words. However, the 19-month-olds showed the same familiar-word preference in the Jamaican accent as in the American accent, indicating cross-dialect phonological constancy for words.

The authors conclude that phonological constancy, along with the complementary ability to differentiate words from similar-sounding words or nonwords (known as phonological distinctiveness), "together serve as a solid foundation on which rapidly build a vocabulary, and later extrapolate from spoken language to the world of reading."

Source: Association for (news : web)

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