The articulation skills of 147 children aged 24 to 48 months were tested and the results compared with earlier classical studies and distinctive feature development. The results of the present study indicate consistently earlier age levels for the correct sound and feature usage than the previous studies, though the general sequences of development are strikingly similar in all studies.

The purpose of this study was to describe the consistency of productions of /θ, r, l, s, ∫, t∫, f, t, k/ in releasing and arresting position for 2 ½- to 5-year-old children. The Coarticulation Assessment in Meaningful Language (Kenney & Prather, 1984) was given to 360 children, 60 at each of six age levels. A four-way multivariate analysis of variance with repeated measures on the last two factors was used to test for main effects and interactions among age, sex, phoneme, and position. These children produced /θ, ∫, t∫, l, f/ with greater accuracy in the releasing position, but articulated /k, s, t/ at similar levels of accuracy in both positions. They produced /r/ with greater accuracy as a vocalic allophone. Further patterns and interactions are discussed.

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