The more words the child has, the less diversity between children. The first 50 words This stage encompasses from about the 1 st year to about 18 months or from 1 st word to when the child begins to put 2-word constructs together. The child is acquiring contrastive words rather than contrastive phonemes. Avoidance children avoid words that do not contain wounds within their inventory Longitudinal studies suggest Earyl inventories contain stops, nasals, and glides. Fricatives and liquids appear later.
Intonational patterns develop prior to stress.
No just realize the weaknesses and what kind of data you are using to evaluate speech problems. This suggests the complex interaction between phonological development and the acquisition of the language system. When complex morphosyntactic or semantic structures are being learned the child s previously correct articulation appear to be replaced by inaccurate ones. Substitution process stopping- suppressed at different times depending on the fricative or affricative on which stopping occurs. Phonological inventory complete by age 5, but complexity of words etc.