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  2. Language delay - Wikipedia

    en.wikipedia.org/wiki/Language_delay

    Language delays act and develop differently individually. Language delay is different than individual variation in language development, and is defined by children falling behind on the timeline for recognized milestones. [14]

  3. Variation (linguistics) - Wikipedia

    en.wikipedia.org/wiki/Variation_(linguistics)

    Variation is a characteristic of language: there is more than one way of saying the same thing in a given language. Variation can exist in domains such as pronunciation (e.g., more than one way of pronouncing the same phoneme or the same word), lexicon (e.g., multiple words with the same meaning), grammar (e.g., different syntactic constructions expressing the same grammatical function), and ...

  4. Age-graded variation - Wikipedia

    en.wikipedia.org/wiki/Age-graded_variation

    Children in Scotland and Northern England soon learn that the use of the glottal stop is considered inferior to the use of /t/ and are taught to correct themselves from an early age. [dubious – discuss] Variation between the glottal stop and /t/ is mostly seen within the middle class due to pressure from adults. This case study provides an ...

  5. Developmental linguistics - Wikipedia

    en.wikipedia.org/wiki/Developmental_linguistics

    Developmental linguistics is the study of the development of linguistic ability in an individual, particularly the acquisition of language in childhood.It involves research into the different stages in language acquisition, language retention, and language loss in both first and second languages, in addition to the area of bilingualism.

  6. Evolutionary psychology of language - Wikipedia

    en.wikipedia.org/wiki/Evolutionary_Psychology_of...

    By some classifications, nearly 7000 languages exist worldwide, with a great amount of variation thought to have evolved through cultural differentiation. There are four factors that are thought to be the reason as to why language variation exists between cultures: founder effects, drift, hybridization and adaptation. With the vast amounts of ...

  7. Language development - Wikipedia

    en.wikipedia.org/wiki/Language_development

    R.L Trask also argues in his book Language: The Basics that deaf children acquire, develop and learn sign language in the same way hearing children do, so if a deaf child's parents are fluent sign speakers, and communicate with the baby through sign language, the baby will learn fluent sign language. And if a child's parents aren't fluent, the ...

  8. Specific language impairment - Wikipedia

    en.wikipedia.org/wiki/Specific_language_impairment

    Specific language impairment (SLI) (the term developmental language disorder is preferred by some) [1] is diagnosed when a child's language does not develop normally and the difficulties cannot be accounted for by generally slow development, physical abnormality of the speech apparatus, autism spectrum disorder, apraxia, acquired brain damage or hearing loss.

  9. Apparent-time hypothesis - Wikipedia

    en.wikipedia.org/wiki/Apparent-time_hypothesis

    The apparent-time hypothesis is a methodological construct in sociolinguistics whereby language change is studied by comparing the speech of individuals of different ages. If language change is taking place, the apparent-time hypothesis assumes that older generations will represent an earlier form of the language and that younger generations will represent a later form.