Research-Based Tools for Phonological Intervention
Preparing therapy materials for speech sound disorders takes time. Finding the right word targets, building contrastive sets, checking word properties — it adds up. PhonoLex puts all of this in one place, backed by peer-reviewed psycholinguistic data so every target selection is grounded in evidence.
PhonoLex consolidates data from 15 research datasets into a single searchable database. Every word carries frequency norms (SUBTLEX-US), age-of-acquisition ratings (Kuperman), imageability and concreteness scores, phonotactic probability measures, and more — 35 filterable properties in total across 9 categories.
Five Clinical Tools
Contrastive Sets
Generate minimal pairs, maximal opposition pairs (Gierut, 1989–1992), and multiple opposition sets (Storkel, 2022) for any phoneme contrast. Filter by word position (initial, medial, final) and sort by any psycholinguistic property. Includes an IPA keyboard for precise phoneme selection.
Custom Word Lists
Build targeted word lists with phoneme pattern matching (starts with, ends with, contains), 35 filterable properties, and phoneme exclusion rules. Find words starting with /s/ clusters that are high-frequency, early-acquired, and exclude sounds your client has not yet mastered.
Text Analysis
Paste any passage and see interactive color-coded highlighting of phonological properties. View aggregate percentile statistics across 35+ measures. Includes three preset phonetics passages for standardized assessment contexts. Useful for analyzing therapy scripts, storybooks, or passages before using them in sessions.
Sound Similarity
Find phonologically similar words using a two-level similarity algorithm built on learned articulatory feature vectors. Adjust onset, nucleus, and coda weights with presets for rhymes, alliteration, assonance, and consonance. Ideal for finding near-minimal pairs, rhyming targets, or phonologically related word sets.
Lookup
Look up any word's full phonological profile: IPA transcription, syllable structure, all psycholinguistic properties with percentile ranks. Explore cognitive associations from 6 relationship types including free association norms (USF) and perceptual confusability data (ECCC). Compare phoneme features using 26 learned articulatory features.
Who Uses PhonoLex?
- School-based SLPs building targeted word lists for articulation and phonological process therapy
- Clinical SLPs preparing contrastive sets for evidence-based phonological interventions
- University clinicians and students learning to apply research-based target selection in practicum
- Researchers needing controlled stimulus sets with verified psycholinguistic properties
Free, Fast, and Private
PhonoLex is free to use with no account required. The app runs at the network edge for fast response times, works on any device with a web browser, and does not store your search data. Export your results as CSV or text files and use them however you need.
Five tools, 44,000+ words, 35 filterable properties. Try PhonoLex today — it is free.
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