CLA revision notes

The first year sees babies working on speech sounds. By the time they are six months old they are making the characteristic burbling sounds we associate with ‘baby talk'. The first year can be roughly divided up into the stages: crying, cooing and babbling. Click the stages in the timeline to find out more.

 The first sound a human baby makes is to cry. Often known as vegetative noises, this is the only way it can express pain, pleasure or hunger. It is an instinctive noise and is therefore not considered a language.

A baby's brain development is in front of its body development and it therefore has to exercise the 100 different pairs of muscles it takes to produce speech sound. Cooing (or gurgling) is a sound development that occurs at around six to eight weeks old. Babies experiment with ‘coo', ‘goo' and ‘ga' and gradually gain more and more control over their speech organs (or vocal cords).

Babbling begins at six to nine months old. It is not learned or copied but pre-programmed. The work-out of the vocal cords means babies repeat syllables over and over. Combinations of vowels and consonants, such as ‘ma', ‘pa', ‘da', are produced and repeated and therefore ‘mama' and ‘dada', known as reduplicated monosyllables, often sound like adult language, and proud parents believe it is baby's first word.

The second year of development sees an increase in the ability to manipulate speech sounds and more of a shaping of sound into familiar pronunciations. The second year can be roughly divided up into the stages ‘one-word', ‘two-word' and ‘telegraphic'. Click the stages in the timeline to find out more.

At this stage, children begin to concentrate on building phonemes into words, beginning largely with nouns, that reflect their needs and interests. Often words for objects a child encounters everyday are the first. Basically, they build a personal vocabulary to deal with their world. Single words convey more than one meaning - “milk!” may mean “I want some milk.” or “I've spilt some milk.” Words used in this way are called holophrases. They substitute a complex grammar.

This stage, during which the major speech pattern is of two-word utterances, happens around 18-24 months old. This is particularly significant because here young children are demonstrating an understanding of the rules that govern how we communicate meaningfully. An example of a two-word utterance might be “Daddy ball!” which could mean a variety of things including “Daddy get the ball”, “That's Daddy's ball” and “Daddy throw the ball”.

A few months after the two-word stage (age varying from child to child) comes what is known as telegraphic stage. Children begin to utter increasingly complex multi-word sentences and grammatical words and endings are also present. This speech is considered to be ‘telegraphic' or like a ‘telegram' in that it includes all the important function words, leaves out ‘little' words like conjunctions, auxiliary verbs and prepositions.

By year three, children are effective language users: still needing to practice, still needing to develop additional lexis, but fundamentally with the building blocks for all future language use. At this stage they begin to crack the code of implied meaning: to understand that, sometimes, language contains messages which can seem to contradict their face value statements.

Children are sophisticated language users by year four. They understand that language carries a multiplicity of meanings, that it can be manipulated and that different audiences require different language use including variations in lexis and intonation. In other words, by year four, their use of language is purposeful

A critical factor in year five is that it is the age that most children start school. So here we see a shift from spoken language as the complete focus to written language: learning to read. This shift towards literacy sees children beginning to make links between print and meaning.

Obviously, the age 13 is still a long way off for Sam, but it's important to mention that beyond this age his language learning ability may actually begin to decline. Some researchers believe that around the age of 13, children's ability to acquire language may begin to decline. Lenneburg et al propose that there is a period during which children are predisposed to acquire language. They also believe that there is a ‘cut off' age (around 13 years) after which acquisition is not possible.

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What is generally agreed is that the vast majority of children acquire language by going through the same series of stages.

Over-extension

Children over-extend word meanings. This means that they will extend the meaning of one category of item more broadly than it should be. An example of this might be calling all round fruits ‘apples' when they are perhaps oranges, kiwis or cherries.

 Under-extension

Children under-extend word meanings. This means that they will not accept that there are more examples of a category of item than the particular one that is familiar to them. So, for example, ‘dog' is used for the family pet but does not apply to any other dog, thus narrowing the word's meaning.

 Morphology is the study of how single words are constructed and how they might be changed to perform a particular function in a sentence.

 Noun plurals

It is generally accepted that children acquire language through an in-built ability to recognise the patterns that exist. However, these patterns are not always straightforward and there are exceptions, so children inevitably make mistakes.

Verb tenses

Young children's speech will reflect some application of regular patterns, for example, adding ‘ed' to form past tenses. However, as yet, irregularities will not form part of their understanding, so birds ‘singed' and children ‘runned' are completely understandable, if not completely accurate sentences.

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Imitation & reinforcement theory (Skinner, 1957)
Skinner was a proponent of the theory that children acquire language by imitating the way others speak. When the child is successful at producing words it is praised. This approval motivates the child to repeat the action thus learning words.
This theory has now been largely discredited. The task of acquiring language is such a vast one – children acquire tens of thousands of words and complex rules of grammar and syntax within a very short space of time.
Further flaws in this theory are revealed if we consider the mistakes children make in their grammar usage. They clearly do not imitate statements such as “I cleaning my tooths”. This is not a sentence formation which would have been praised by an adult.

Innateness theory (Chomsky, 1965)
Noam Chomsky argued against Skinner's theory. He reasoned that children have an innate ability to acquire language through what he called a ‘language acquisition device' (LAD).
Chomsky claimed that all languages have a different surface structure - French and English sound different from each other through their differing intonations and stresses. However, he felt that all languages share the same deep grammar structure, or linguistic universals - subject–verb-object. His theory suggests we are pre-programmed with this deep structure. Chomsky's theory explains how children can understand sentences they've never heard before.
Critics such as Bard and Sachs (1977) argue that children don't learn to speak automatically. They need to communicate and interact with others – innateness alone is not enough.

Cognition theory (Piaget, 1966)
The cognition theory links stages in language acquisition with stages of cognitive development. Piaget observes that children initially view themselves as the centre of the universe believing that objects exist only in relation to themselves. At around 18 months children begin to realise that objects have an existence that is nothing to do with them. A big growth in vocabulary occurs at this time and proponents of the cognition theory suggest that these events are linked - children are compelled to find names for things they now know exist. Piaget's theory shows a relationship between language and thought – though the theory only seems to stand up for the first 18 months of a child's life. Studies show that some children whose mental development is retarded can speak fluently. Here it seems that word order, meaning and grammar have not been subject to the child's general cognitive development.

Critical period hypothesis

This theory suggests that there is a critical time in a child's life, during which time they are capable of acquiring language. However, this time is limited – evidence suggests that the cut off age is around 13 years.