Cognitive Connie
Förstå språkutveckling under spädbarnsperioden
Språket börjar inte när det första ordet uttalas. Månader före "mamma" eller "boll" framträder lägger spädbarnet grunden för den perceptuella, sociala och kognitiva kapacitet på vilken språket ska byggas. Att förstå hur språket börjar kräver att vi ser bortom ord och mot de förmågor som gör ord möjliga: förmågan att uppfatta talade ljud kategoriskt, att extrahera statistiska regelbundenheter ur ett flöde av ljud, att dela uppmärksamhet mot ett föremål med en social partner, och att avkoda andras kommunikativa avsikter.
Nyckelpersoner
Patricia Kuhl
b. 1946Research on perceptual attunement to native phoneme categories across the first year of life, showing that the "universal listener" of early infancy becomes a native-language specialist by 10–12 months. Also demonstrated that live social interaction is necessary for this learning — infants did not narrow their phoneme categories from exposure via video or audio alone.
Michael Tomasello
b. 1950Emphasised joint attention and the understanding of communicative intentions as the uniquely human foundation of language acquisition. Argued that word learning is not a matter of statistical association but of reading the social intent behind a pointing gesture or gaze.
Jenny Saffran
b. 1967Demonstrated statistical learning of word segmentation in 8-month-old infants using an artificial language paradigm, establishing that language learning is partly driven by implicit tracking of distributional regularities in the input.
Nyckelbegrepp
Categorical Speech Perception
The tendency to perceive speech sounds as belonging to discrete categories rather than as points on a continuous physical dimension. Demonstrated in infants using the high-amplitude sucking habituation paradigm: infants treat a shift across a phoneme boundary (e.g., /p/ to /b/) as more salient than an equally large shift within a category. Initially universal, it narrows to native-language contrasts by 10–12 months.
Statistical Learning
The implicit extraction of regularities — particularly transitional probabilities between adjacent syllables — from the input stream. Saffran, Aslin, and Newport (1996) showed that 8-month-old infants segment words from a continuous artificial language after 2 minutes of exposure, using the fact that syllables within words follow each other with higher probability than syllables across word boundaries.
Canonical Babbling
Babbling that conforms to syllabic structure — repeated consonant-vowel sequences such as "bababa" or "mamama." Emerges between 6 and 10 months and is considered a universal milestone of pre-linguistic development. Its onset reflects maturation of the vocal tract and oro-motor control, and its phonological content is increasingly shaped by the ambient language.
Joint Attention
The capacity to co-ordinate visual attention with a social partner toward a shared external object or event, achieved through gaze following, pointing, and referential looking. Emerges reliably around 9–12 months. Functions as the scaffold on which word learning is built: words are typically learned in joint attention episodes in which caregiver and child share a referent.
Child-Directed Speech (Motherese)
The register adults spontaneously adopt when talking to infants: higher pitch, exaggerated prosodic contours, slower pace, simpler grammar, and repetition. Infants prefer it to adult-directed speech. It may facilitate phoneme discrimination, word segmentation, and syntactic learning by making the acoustic properties of the language more salient.
Perceptual Narrowing
The developmental process by which infants' initially universal sensitivity to phoneme contrasts narrows to the contrasts relevant to their native language. By 10–12 months, infants who once discriminated Hindi retroflex consonants or Zulu click consonants no longer do so reliably. Reflects neural tuning driven by statistical exposure to the ambient language.
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Senast granskad juli 2025- 1.
Saffran J.R., Aslin R.N., & Newport E.L. (1996). Statistical learning by 8-month-old infants. Science, 274, 1926–1928.
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The landmark demonstration of word segmentation via statistical learning in infants.
- 2.
Kuhl P.K. (2004). Early language acquisition: Cracking the speech code. Nature Reviews Neuroscience, 5, 831–843.
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Overview of perceptual attunement, statistical learning, and the social gating of phoneme learning.
- 3.
Tomasello M. (2003). Constructing a Language. Harvard University Press.
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Argues that joint attention and intention-reading underlie word learning and syntactic development.