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Item Context and /s/ Phone Articulation Test Results

Ralph L. Shelton
University of Arizona, Tucson, Arizona

William B. Arndt
University of Missouri, Kansas City, Missouri

Virginia Wright
Mary Elbert
University of Kansas Medical Center, Kansas City, Kansas

Fourteen children who misarticulated some phones of the /s/ phoneme were tape recorded articulating several lists of items involving /s/. The lists included the Mc-Donald Deep Test for /s/, three lists similar to McDonald's but altered in broad context, and an /s/ sound production task. Scores from lists were correlated, compared for differences in means, or both. Item sets determined by immediate context were also compared for differences between means. All lists were found to be significantly correlated. The comparison of means indicated that both broad and immediate context were related to test result. The estimated "omega square" statistic was used to evaluate the percentage of test score variance attributable to context.