Maximal Oppositions Approach: How It Works, Word Pairs, and Who It Fits
Maximal oppositions therapy pairs a sound the child does not yet use with a very different one — different in place, manner, and voicing, like “mall” vs. “call.” A 2022 tutorial recommends it for errors across several sound classes. In the 1989 study that introduced it, one child learned 16 word-initial consonants.
How maximal oppositions works
ASHA groups maximal oppositions with the phonological contrast approaches, which use contrasting word pairs as targets instead of individual sounds, so the child learns that changing a sound changes meaning. In maximal oppositions, the pair contrasts a sound the child does not know with a sound that is maximally distinct — differing on several dimensions at once: voicing, place, and manner.1
The idea is that a bigger contrast teaches more of the sound system. In the 1989 study, a child who left out word-initial consonants learned 16 of them after treatment on only three sets of maximal contrasts, and appeared to reorganize their system around a broader concept of “word-initial.”3
Example maximal pairs
| Target | Contrast sound | Word pair | How they differ |
|---|---|---|---|
| /k/ | /m/ | call – mall | Voiceless velar stop vs. voiced bilabial nasal (ASHA’s example) |
| /s/ | /m/ | sad – mad | Voiceless alveolar fricative vs. voiced bilabial nasal |
| /f/ | /n/ | fine – nine | Voiceless labiodental fricative vs. voiced alveolar nasal |
| /ʃ/ (SH) | /m/ | shoe – moo | Voiceless postalveolar fricative vs. voiced bilabial nasal |
| /r/ and /d/ (empty set) | both unknown | row – doe; ray – day | Two maximally opposed sounds the child does not yet use (ASHA’s example) |
Each pair differs in voicing, place, and manner.1
In the empty-set variant, both sounds in the pair are unknown to the child. Practice words are real words chosen so each pair changes meaning.1
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Who it fits
| Child’s profile | Approach |
|---|---|
| A small number of errors — older children or mild disorders | Conventional minimal pairs |
| Multiple errors across several sound classes | Maximal oppositions |
| One sound replacing many (global phoneme collapse) | Multiple oppositions |
Choosing among contrast approaches (Storkel, 2022).2
The tutorial argues conventional minimal pairs should be restricted to children with few errors, and that SLPs have an opportunity to use newer, more efficacious approaches like maximal oppositions with younger children and more severe disorders. ASHA likewise notes maximal oppositions may help children with several errors across different sound classes.2,1
Part of the complexity family
Maximal oppositions sits alongside complexity-based target selection, which ASHA describes as targeting more complex phonological elements not in the child’s system — clusters, fricatives, affricates, and the least stimulable sounds — to encourage cascading, generalized learning.1
For parents
Contrast approaches are chosen and run by an SLP based on a child’s whole sound system. If your child’s SLP uses maximal pairs, ask for the word list so you can practice the same pairs at home.
Frequently asked questions
What is the maximal oppositions approach?＋
A phonological contrast approach that uses pairs of words differing in a sound the child does not use and a sound that is maximally distinct from it — varying in voice, place, and manner. ASHA’s example is “mall” vs. “call”: /m/ is a voiced bilabial nasal, /k/ a voiceless velar stop.
What is the difference between minimal and maximal pairs?＋
Minimal pairs contrast the target with the child’s error, which usually differ by one feature (“key” vs. “tea”). Maximal pairs contrast the target with a very different sound the child already uses. A 2022 tutorial recommends minimal pairs for children with few errors and maximal oppositions for children with multiple errors across several sound classes.
What is the empty set approach?＋
A variant in which both sounds in the pair are unknown to the child and maximally opposed — ASHA’s example is /r/ and /d/, as in “row” vs. “doe” or “ray” vs. “day.”
Is maximal oppositions evidence-based?＋
It has research support. The 1989 study that introduced it reported a child who learned 16 word-initial consonants after only three sets of maximal contrasts, and a 2022 clinical tutorial describes it as one of the newer, potentially more effective contrast approaches than conventional minimal pairs.
Put this into practice today
Try the free target-word generator, or start daily AI speech practice — every child takes one SpeechStep at a time.
References
3 sources from authoritative bodies. Last reviewed October 2026.
- 1.ASHASpeech Sound Disorders: Articulation and Phonology — Practice Portal page.
- 2.Peer-reviewedStorkel — Minimal, Maximal, or Multiple: Which Contrastive Intervention Approach to Use With Children With Speech Sound Disorders? — Clinical tutorial (LSHSS), 2022.
- 3.Peer-reviewedGierut — Maximal Opposition Approach to Phonological Treatment — Treatment case study (Journal of Speech and Hearing Disorders), 1989.