AP Syllabus focus:
‘Language develops through stages such as cooing, babbling, one-word speech, and telegraphic speech across cultures.’
Language development shows a broadly predictable sequence of milestones from birth through early childhood.
AP Psychology emphasises identifying each stage, its typical features, and how this progression appears widely across cultures.
Overview: What “stages” mean
Language develops through qualitatively different milestones that build on earlier vocal and cognitive abilities. The ages are approximate; children vary, but the overall order tends to be consistent.
Development reflects growing control of speech sounds, meaning, and combining words
Progress depends on both biological maturation (e.g., vocal tract and brain development) and language exposure
“Across cultures” means the sequence is widespread, even though the exact sounds and words depend on the specific language(s) a child hears
Core stages of early language development
Cooing (around 2–4 months)
Cooing involves long, drawn-out vowel-like sounds (e.g., “oo,” “ah”), often produced during pleasant social interaction.
Signals early vocal experimentation and comfort
Occurs in many cultures because it relies on basic vocal capacity rather than learned vocabulary
Caregivers often respond, which can increase infants’ vocalisations through attention and interaction
Babbling (around 4–10 months)
Babbling introduces more speech-like sound patterns, including repeated consonant-vowel combinations (e.g., “ba-ba,” “da-da”).
Moves from varied sounds to more rhythmic, syllable-like patterns
Early babbling includes many human phonemes; later babbling tends to reflect the sound inventory of the language(s) heard regularly
Babbling: The stage in which infants spontaneously produce speech-like sounds (often consonant-vowel syllables) that are not yet meaningful words.
Babbling is a key bridge between raw vocal play and meaningful speech because it provides practice coordinating breathing, voicing, and articulation.
One-word speech (around 12 months)
In one-word speech, infants produce single words to communicate meaning. These early words are often highly functional (people, objects, actions) and used in context.
A single word can carry a broad message (e.g., “milk” might mean “I want milk”)
Words are shaped by the child’s language environment, but the milestone of using single words meaningfully is widely observed across cultures
One-word speech (holophrastic stage): A stage in which a child communicates using single words that function like whole phrases or sentences.
Children’s pronunciation is often simplified at first; clarity increases with practice and development.
Telegraphic speech (around 18–24 months)
Telegraphic speech is the early two- to three-word stage that resembles a telegram: short, efficient, and focused on key content.
Combines meaningful words, often omitting “little” function words (articles, prepositions) and endings
Common patterns include actor + action (“Daddy go”) or action + object (“want cookie”)
The ability to combine words shows growth in understanding how language can express relationships, not just labels
Telegraphic speech: Early multiword speech that contains mostly nouns and verbs and omits many function words and grammatical markers.
Cross-cultural patterns and variation
What is similar across cultures
The order of stages (cooing → babbling → one-word → telegraphic) is highly consistent
Early interactional “turn-taking” between infant and caregiver is common, supporting practice with timing and vocal exchange
Photographic figure showing two common early communicative gestures (pointing and waving) used during caregiver–infant interaction. These gestures support joint attention and turn-taking, which in turn scaffolds later word learning and the transition into meaningful speech. Source
What varies across cultures
The specific sounds emphasised in later babbling reflect the language(s) heard
The words chosen for first vocabulary depend on cultural routines and what caregivers talk about most
The amount and style of caregiver speech to infants can differ, but children typically still progress through the same broad stages given sufficient exposure to language in their environment
FAQ
Not necessarily. Milestones may appear distributed across two languages.
Apparent “delay” can reflect smaller vocabularies in each language, while total vocabulary across both can be similar.
Researchers look for consistent sound patterns tied to a specific meaning.
They also check whether the child uses the form repeatedly and appropriately across situations.
Early coo-like sounds can appear, but reduced access to spoken input often changes later babbling patterns.
With early intervention and accessible language input, communicative development can still progress.
Vocabulary growth can accelerate once children grasp that words reliably label and request.
Improved memory, attention, and social motivation can contribute to faster word learning.
They typically do not affect cooing, babbling, one-word, or telegraphic speech.
Those stages are primarily spoken-language milestones; literacy-related differences emerge later with reading instruction.
Practice Questions
Identify two stages of language development that typically occur before age two. (2 marks)
1 mark for correctly naming one stage (e.g., cooing, babbling, one-word speech, telegraphic speech).
1 mark for correctly naming a second stage.
A researcher observes an 20-month-old saying “more juice” and “mummy go.” Explain which language development stage this illustrates and give two features of that stage. (5 marks)
1 mark for identifying telegraphic speech.
1 mark for linking the examples to multiword combinations (two- to three-word utterances).
1 mark for noting content words (mainly nouns/verbs).
1 mark for explaining omission of function words/grammatical markers (e.g., articles, inflections).
1 mark for a clear description tied to the child’s utterances (contextualised explanation).
