Skill Progression 30-33 months 33-36 months 36- 42 months 42 -48 months 48-54 months 54-60 months B. Possible Cluster reduction, Simplifies words May use stopping, 75% of children: 75% of children: 75% of children: sound errors cluster of sounds that are or substituting a No longer No longer No longer reduced (e.g., multisyllabic to stop /b, p, d, t, g, k/ substitute a front substitute non- substitute peak/speak) CV or CVCV form for a fricative /s, z, sound for a palatal sounds for palatal sounds for (e.g., banana f, v, th, h, sh, zh/ back sound (tongue on (tongue becomes (e.g., (e.g., tat/cat) palate) sound at on palate) sound “nana”) moud/mouse) the end of a word at the beginning (e.g., dit/dish) of a word (e.g., tai/shy) Gliding may occur Produces May use fronting, 75% of children: 75% of children: (substitution of substitutions produce a No longer replace No longer glide /w/ or /y/ and distortions consonant in the an affricative with substitute for liquid sounds, of consonants front of the mouth a continuant or alveolar (made /r/ or /l/ (e.g., that should be stop (e.g., with tongue near woom/room) produced in the sip/chip) upper teeth back (tar/car) ridge) sounds for alveolar (e.g., tu/shoe) Stopping /th/ No longer May use cluster 75% of children: 75% of children: (e.g., dis/this) substitutes a reduction No longer reduce No longer voiced (tuck/truck) consonant substitute consonant for clusters voiceless final an unvoiced (e.g., gape/grape) consonant for a consonant voiced consonant (e.g., zun/sun) (e.g., bak/bag)
Skill Progression 30-33 months 33-36 months 36- 42 months 42 -48 months 48-54 months 54-60 months B. Possible sound errors Cluster reduction, cluster of sounds reduced (e.g., peak/speak) Simplifies words that are multisyllabic to CV or CVCV form (e.g., banana becomes “nana”) May use stopping, or substituting a stop /b, p, d, t, g, k/ for a fricative /s, z, f, v, th, h, sh, zh/ (e.g., moud/mouse) 75% of children: No longer substitute a front sound for a back sound (e.g., tat/cat) 75% of children: No longer substitute sounds for palatal (tongue on palate) sound at the end of a word (e.g., dit/dish) 75% of children: No longer substitute sounds for palatal (tongue on palate) sound at the beginning of a word (e.g., tai/shy) Gliding may occur (substitution of glide /w/ or /y/ for liquid sounds, /r/ or /l/ (e.g., woom/room) Produces substitutions and distortions of consonants May use fronting, produce a consonant in the front of the mouth that should be produced in the back (tar/car) 75% of children: No longer replace an affricative with a continuant or stop (e.g., sip/chip) 75% of children: No longer substitute alveolar (made with tongue near upper teeth ridge) sounds for non- alveolar (e.g., tu/shoe) Stopping /th/ (e.g., dis/this) No longer substitutes a voiced consonant for an unvoiced consonant (e.g., zun/sun) May use cluster reduction (tuck/truck) 75% of children: No longer reduce consonant clusters (e.g., gape/grape) 75% of children: No longer substitute voiceless final consonant for a voiced consonant (e.g., bak/bag)
Progressions%20at%20a%20glance.docx