Language Development and Imitation in Infancy

Imitation in Infancy

Imitation is a valuable learning source for children, even in infancy.
Example: A toddler learns to brush teeth by imitating their father.
Effective imitation requires:
- Symbolic thought.
- Development of motor skills.
- A recognized, suitable model.
Research on babies showed that while they responded with emotional facial expressions when shown pictures of human faces depicting various emotions, their expressions did not match the pictures, and were hard to classify.
Controversy remains regarding the interpretation of imitation; some researchers believe that imitation, even in limited form, reflects an infant’s need to communicate.
- Infants explore their social world and form relationships through imitation.
- Example: An infant gazes, an adult smiles back, and the infant smiles, reinforcing interaction and initiating a pleasurable interaction.
Responsiveness and imitation contribute to infant-caregiver attachment.
The ability to imitate is an important foundation for social interaction later in life, enabling appropriate reactions to others.
Infant imitation of parents' behaviors and expressions aids in ensuring positive infant-adult relationships.

Theories of Language Acquisition

Language acquisition progresses through several phases.
- 8 weeks: Open-mouthed, cooing noises when content.
- 4 months: Addition of consonant sounds and complicated babbling.
- 6 months: Saying several words like ‘dada’, ‘mama’, ‘Dana’, and ‘narna’.
- 9 months: Avid talking with words like ‘cheese’, ‘matches’, and ‘bird’.
Individual differences exist in language development milestones.
Typically, a vocabulary of 5-20 words (mainly nouns) develops between 15-18 months.
Language enhances the ability to learn about new people, objects, and events, and provides a way to express feelings more precisely.
Language allows fuller participation in family and community through dialogue.
Benefits appear as soon as language begins to develop, usually around a child’s first birthday.
l Linguistic Skill Development:
Vocabulary expands into middle age and beyond.
Subtle language aspects, like tact and diplomacy, also improve.
The primary challenge for infants is acquiring language in the first place.

Processes in language acquisition:

Mastering language structure (sounds and organization).
Learning how language is used (purposes and conversational conventions).

Scholars have long debated how children acquire language, with arguments centering on biogenetic predispositions versus environmental influences.

Learning Theory Approaches

B. F. Skinner argued that language acquisition is explained by behavioral principles of learning.
Children learn to speak through operant conditioning: word production is a result of conditioned responses maintained through reinforcement.
Example: A child says sounds when seeing a dog, and the caregiver rewards this by smiling when the sounds approximate the word ‘dog’, reinforcing the vocalization.
Evidence is often cited in the emergence of a child’s first word, commonly ‘dadda’.
Infants may say ‘da-da-da-da’ during babbling, leading the father to smile and say, 'Wow! She said “dadda”!' reinforcing the behavior.
Parents reinforce closer approximations to ‘dadda’, shaping the child’s pronunciation towards the culturally acceptable version, ‘Daddy’.

Nativist Approach

Noam Chomsky challenged Skinner, arguing his theory did not adequately account for the speed and ease of language acquisition.
Chomsky maintained that operant conditioning couldn't produce the rapid word acquisition seen in young children.
Children produce correct grammatical forms despite imperfect adult language models.
Chomsky argued that the poverty of content in infant-directed speech provides an inadequate guide for learning grammar.
Chomsky proposed an alternative biogenetic model, stating children’s grammar acquisition is largely innate.
Nativist Approach: Skills and abilities are ‘hard wired’ in the brain and present at birth.
Language Acquisition Device (LAD): An innate mechanism with specialized brain structures that facilitates rapid language acquisition.
- LAD functions as an inborn ‘road map for language’ activated upon hearing speech.
Universal Grammar: Innate rules that allow children to easily assimilate the syntax of any human language.
Children are ‘hard wired’ to easily assimilate any language.
LAD selects appropriate syntactic categories from experienced language, aiding in navigating language structure.
Recent research has identified a gene linked to language production.
Limitations: The nativist approach downplays the role of the language environment in language development.
Environmental Exposure: Exposure to language is essential to ‘kick-start’ the LAD.

Interactionist Approaches

Integrate behaviorist and nativist approaches, acknowledging genetic predispositions and the necessity of particular experiences for language development.
Maintain that language is not divorced from cognitive development and that social interactions are essential for language growth.
Language seems to mature through interactions between an active child and key people providing linguistic experiences.
Infants' linguistic accomplishments lead to questions about the acquisition of vocabulary and grammar in a short time.
Infants learn the sounds (phonology), words (lexicon), meanings (semantics), and conversational uses (pragmatics) of language.
They also learn how to organize words into sentences and discourse (syntax).

Components of Language Development in Infancy

The focus is on phonology, lexicon, and semantics during infancy.

Phonology

Every language uses a finite number of phonemes (distinctive sounds).
English has about 41 phonemes; other languages vary.
Infants must become sensitive to phonemes and ignore meaningless variations.
Humans may be born with the innate ability to detect phonemic differences.
Babbling: Begins between 4-8 months, involving repetition of consonant-vowel combinations.
Infants babble for the reward of hearing themselves vocalize.
Research on congenitally deaf children shows differences in babbling compared to children with normal hearing.
Babbling Motivation: All physically normal infants begin babbling around six months, regardless of culture or language.
Deaf infants have been observed babbling with their hands, using repetitive hand gestures analogous to oral babbling.
Language environment significantly influences an infant’s babbling.
Deaf infants start oral babbling later and only with amplified sound, such as through a hearing aid.
Babbling provides opportunities to experiment with sound and meanings before conventional speaking.
Babbling continues for approximately 4-5 months after first words are spoken.

Semantics and First Words

Semantics: The meanings of language and words, never fully mastered even by adults.
Most people never learn a majority of words in their native language.
Meaning is derived from the world rather than just other words.
Children generally prefer nominals (labels for objects, people, and events) over verbs or modifiers and can identify these as early as 6–9 months.
Among nominals, they most likely name frequently used or prominent things.
A child’s own mother or father may be named early.
Other Words: ‘Dog’ may appear as an early word more than ‘sun’ or ‘nappy’ despite the latter being experienced more frequently.
Children place varying levels of emphasis on different language functions in their first utterances.
- Referential Style: First words refer to objects and objective events (e.g., ‘car’, ‘book’).
- Expressive Style: Using words to express feelings and relationships (e.g., ‘hello’, ‘stop it’).
- During the second year, infants with a referential style advance more rapidly in vocabulary and syntax.
Attachment Styles: Infants with secure attachments to primary caregivers acquire more of a referential style.
Exploration: Secure children are more prepared to explore their environment and leave their parents, encountering more new objects, experiences, and people.
These children need to acquire a larger vocabulary and more varied expressions, eagerly imitating their parents’ naming of objects.
Memory Improvement: Parents reinforce this behavior, aiding rapid vocabulary growth.
Word Acquisition Rate: Between 18 and 24 months, children learn up to 5-6 new words a day.
Vocabulary Size: By age six, children have an extensive vocabulary of about 10,000 words.
Supporting Factors: Improved categorization, word retrieval, pronunciation, imitation, and awareness of others’ intentions.
Fast Mapping. The ability to connect a word with its underlying concept after a brief experience with the word.
- Very apparent in toddlers after mastering their first words.

Parental Influences on Language Acquisition

Parents often treat infants as conversation partners, even when very young.
Example: A mother asks questions of her three-month-old, implying that the child is capable of responding, leaving pauses for hypothetical responses and replying on her behalf.
Turn-Taking: The mother teaches about turn-taking in conversations, expressing faith the infant will eventually learn these conventions.
Responsiveness: Parental responsiveness to infant communication attempts promotes their communication skills.
Parents modify responses to increase vocabulary and sentence structure once infants start producing words.
Scaffolding: Parents are using Vygotsky’s concept of scaffolding, where they use language a little bit beyond the ability of the child.
Words and Sentences Communicate: Parents teach that language is more than interesting noises and babbling.
Infant-Directed Speech: Infant-directed Speech/caregiver speech, (formerly motherese), features shorter sentences, simpler vocabulary, slower pace, higher and more variable pitch, and repetition.
Vital Role: This type of speech plays a vital role in language acquisition and encourages early linguistic competence.
Harvard Preschool Project:
Longitudinal study reviewed parent–infant contact at home.
The most intellectually and socially competent infants had parents who directed large amounts of language at them.
The most competent babies were engaged in learning about twice as much as the least competent infants in the study.
Initiation of Interactions: The most competent infants stimulated interactions with their parents, primarily by procuring various kinds of help.

Multicultural Views on Language Development

Constant close contact between caregiver and infant may encourage more nonverbal communication and result in an infant who fusses relatively little.
Cultural Influences: Parents use vocalisations, gestures, and facial expressions, shaped by culture, to interact and communicate with infants.
Parenting Styles: Style of parenting is often culturally specific.
- Distal Parenting: Common in Western countries; emphasizes autonomy and separateness, with extensive infant-directed vocalization and face-to-face contact.
- Proximal Parenting: Common in traditional subsistence societies; characterized by close body contact and less face-to-face contact.
Language starts with memorizing phrases and then understanding individual words.
Parenting styles influence language development but suit the cultural environment.
Children in Italy are exposed to a high level of gestures which makes them display a greater use of gestures compared to American children, yet they have smaller vocabularies.
Cultural Beliefs: In some cultures (Kenyan and Papuan), there is a belief that babies cannot understand talk, resulting in lower levels of talking and different speech forms.

Influences of Others on Language Acquisition

Professional caregivers in childcare also support language acquisition through responsiveness.
Contingent Dialogue: Extending the child’s verbal initiatives, such as naming objects.
Contextual Dialogue: Familiar language routines or rituals in an infant care setting.
Dialogues require:
Simplification: Uses infant-directed speech considering the infant’s early language stage.

Ways Caregivers Can Assist in Language Development

Sitting on the floor with infant and reading books, telling stories, or singing songs.
Holding infant close, looking into infant’s face, smiling, and talking to infant.
Responding to infant’s first words and gestures using caregiver’s own words and gestures.
Offering simple choices to infant verbally (‘Do you want to paint or to play outside?’).
Encouraging infant (especially if a toddler) to express desires and resolve differences using words (‘What do you want to do?’).

Late-Talking Children

Language delay is not a risk factor for later behavioral and emotional problems if they catch up.
Catch-Up: Most children 'catch-up' to normal language milestones by school age.
Australian Study: A study tracked language delay from two years of age through to late adolescence, observing 1387 children.
The study found that 1245 children achieved ‘normal’ language development by two years of age, while 142 were classed as late-talkers (9.9 per cent).
Findings: Late-talkers had increased psychosocial problems at age two, but these problems tended not to continue at later ages.
Intervention: Parents should provide a rich language-learning environment: playing with the child, talking, and reading to them.
Vocabulary: By two years of age, children will usually have a vocabulary of around 50 words and have begun combining those words in two or three word sentences.
Caution: If language problems persist in school-aged children, they are at increased risk of behavioral difficulties, and parents should seek assistance.
Early Identification: Researchers are investigating how to identify late-talkers who won’t ‘catch-up’ early for better intervention outcomes.