How Children Build the Sound System

What comes back to you?

SPEAK Let's see what stuck from last time, no notes: how many marks and minutes does Paper 2 give you? What do /slashes/ mean in a transcript? And what was the Golden Rule about how to describe a child's language?

45 marks, 75 minutes, one question · slashes show the sounds actually produced · development, never deficit — the child is building, not failing.

Today: the five sound-simplification patterns, so you can name exactly what a child is doing with any word they transform.

The mystery

A child aged 2;6 produces these four words:

"spider" → /paɪdə/ "tree" → /ti:/ "snake" → /neɪk/ "plane" → /peɪn/

SPEAK Four different words — but the child is doing one consistent thing. Study the four transformations and say the rule this child seems to be following, in your own words, before revealing anything.

Wherever two consonants sit together (sp-, tr-, sn-, pl-), the child keeps ONE and drops the other. Their simplifications aren't random — they follow rules. That's why phonology is analysable, and that discovery is the whole point of today.

The five patterns

Nearly every child pronunciation you'll meet in a transcript is one of these five moves. Each has a precise name — the terminology that earns marks.

1 · Substitution

Swapping a difficult sound for an easier one made in a similar way.
"pink" → /bɪŋk/ "the" → /də/ "run" → /wʌn/
Try it yourself: put your hand on your throat and say /p/ then /b/. Same lips, same shape — /b/ just adds voice. Children swap along these tiny distances.

2 · Consonant cluster reduction

Two or three consonants together get trimmed to one.
"spoon" → /pu:n/ "blue" → /bu:/ "next" → /neks/
Clusters are gymnastics for a small mouth — the tongue must change position mid-consonant.

3 · Weak syllable deletion

The quiet, unstressed part of a long word disappears; the loud parts survive.
"banana" → /ˈnænə/ "pyjamas" → /dʒɑ:mz/ "tomato" → /ˈmɑ:təʊ/
Children hear rhythm before detail — they keep the drumbeat of the word.

4 · Elision in fast speech

Small grammatical words get compressed, just as adults do with "gonna" and "'cos".
"and" → /ən/ "because" → /kɒz/
Worth saying in an essay: some child reductions simply mirror normal spoken English.

5 · Reduplication

Repeating a syllable instead of producing two different ones — the signature of very early speech.
"water" → /wɔ:wɔ:/ "dog" → /wʊfwʊf/
More common before age two; by three it's usually fading — so its presence or absence helps you place the stage.

SPEAK Cover the five boxes. Name all five patterns from memory and give one example each — invent your own examples if you can.

Sound detective

For each real-style example: name the pattern first, out loud, then click. The patterns are mixed up — part of the skill is diagnosing which one you're looking at.

1. "sleep" → /li:p/

2. "computer" → /ˈpju:tə/

3. "cat" → /tæt/

4. "bottle" → /bɒbɒ/

5. "fish and chips" → /fɪʃ ən tʃɪps/

The twist: difficulty isn't everything

Here is a real-style paradox. The same child, same day, aged 3;2:

"blue" → /bu:/ but "tyrannosaurus" → /tɪˌrænəˈsɔ:rəs/ — near perfect

SPEAK "Blue" is one of the easiest words in English. "Tyrannosaurus" is a five-syllable monster. How can a child master the monster and simplify the easy one? Build your best explanation before revealing.

Practice and passion beat difficulty. Children master the words they hear most and care about most — a dinosaur-obsessed child rehearses "tyrannosaurus" daily and has no such relationship with "blue". Hold this thought: in Lesson 4 it becomes a full theory (usage-based acquisition) with researchers' names attached.

Variability — the fingerprint of development

One more high-value observation. The same child may produce the same word differently within minutes:

"dinosaur" → /daɪnsɔ:/ ... then later ... /daɪnəsɔ:/

A fixed error would be the same every time. A developing system wobbles — sometimes the adult form appears, sometimes not. Spotting variability (and calling it that) tells an examiner you understand what "in development" actually means.

Exam voice: the phonology paragraph

Here is a model of a full top-level paragraph. Read it once, then we'll take it apart.

"Ella's pronunciation shows systematic simplification typical of a child of 2;8. She reduces the consonant cluster in 'spoon', producing /pu:n/, and deletes the weak syllable of 'banana' in /ˈnænə/ — patterns which target the hardest articulatory sequences while preserving each word's stressed core. Crucially, these forms are rule-governed rather than random, and her mother's instant understanding ('you want the spoon?') shows that within a shared home context they communicate perfectly, allowing Ella to direct the interaction despite her still-developing sound system."

Take it apart

Find and say aloud: the two quotes · the two named patterns · the "typical of the stage" framing · the context link · the sentence that kills the deficit model.

Quotes: /pu:n/, /ˈnænə/ · Patterns: cluster reduction, weak syllable deletion · Stage framing: "typical of a child of 2;8" · Context link: the mother's understanding in a shared home context · Anti-deficit: "rule-governed rather than random" + "communicate perfectly".

Your turn

Data: Theo, aged 2;5, playing with toy animals with his grandmother:

G: which one shall we feed first?
T: the /nel/ (.) feed the /nel/
G: the snail! (.) what does the snail eat?
T: /li:vz/ (.) green /li:vz/
G: green leaves (.) and who eats the grass?
T: /ˈræf/ (2) the /dʒɪˈræf/

Write one full phonology paragraph. Target: two quotes, two named patterns, stage framing, a context link — and if you can, use "variability" (look at his two attempts at "giraffe").

"Theo's speech at 2;5 shows classic cluster reduction: 'snail' is produced as /nel/, trimming /sn/ to a single consonant. His two attempts at 'giraffe' — /ˈræf/ then /dʒɪˈræf/ seconds later — reveal the variability of a system in development: the full form is available but not yet stable. His pronunciation of /li:vz/ is target-like, showing simplification is selective, not global. Throughout, his grandmother's expansions ('the snail!') confirm every meaning has landed, so his developing phonology never blocks the shared game."

SPEAK Compare honestly: which ingredient does the model have that yours is missing? That ingredient is your next-paragraph target.

Recall zone

Reaching back before today — out loud, from memory:

From Lesson 1: what are the four ingredients of an exam-voice sentence?

Quote the data · name the feature · frame as typical of the stage · link to the conversation/context.

From Lesson 1: in a transcript, what do (.) and (2) each mean, and why can a pause be evidence?

(.) is a micro pause; (2) is a two-second pause. Pauses show thinking time, turn-holding, or an adult deliberately waiting — all analysable interaction behaviour.

From memory

1. Name all five sound patterns and give one example of each.

Substitution (/bɪŋk/ for pink) · cluster reduction (/pu:n/ for spoon) · weak syllable deletion (/ˈnænə/ for banana) · elision (/kɒz/ for because — adults too) · reduplication (/wɔ:wɔ:/ for water).

2. What does "variability" mean and why is it worth a sentence in any essay?

The same word surfacing in different forms minutes apart. It proves the system is developing rather than fixed — precise evidence for the word "developing" in the question.

3. Why does "he can say tyrannosaurus but not blue" matter?

It shows frequency and personal interest drive mastery more than difficulty does — the door to usage-based theory in Lesson 4.

One-minute teach-back

1:00

SPEAK Explain to someone who has never studied linguistics why a two-year-old saying /pu:n/ for "spoon" is clever, not careless. One minute, no notes.

REFLECT Which activity today did most to make the five patterns stick — the mystery, the detective round, or writing the paragraph? What does that tell you about how to revise?

I can name the five phonological simplification patterns in any child transcript and write an exam paragraph about them.