Language Speech and Hearing Services in Schools · 2014 · 76 citations · 36 references
EducationInstructionSpeech-language PathologyLanguage EducationPediatric Speech-language PathologyVocabulary DevelopmentLanguage AssessmentLanguage InterventionLanguage LearningVocabulary AcquisitionVocabulary AssessmentVocabulary InstructionClassroom-based InterventionFeasibility Study DesignLanguage-based InterventionNarrative Language DifficultiesPediatric Speech-language InterventionSchool-based Speech InterventionSubgroup DifferencesSubgroup Performance Differences
PURPOSE: This nonrandomized feasibility study was designed to provide a preliminary assessment of the impact of a narrative and vocabulary instruction program provided by a speech-language pathologist (SLP) in a regular classroom setting. METHOD: Forty-three children attending 2 first-grade classrooms participated in the study. Children in each classroom were divided into high- and low-risk subgroups on the basis of their performance on a narrative test. Narrative and vocabulary instruction was provided by an SLP in 1 classroom for three 30-min periods per week for 6 weeks. RESULTS: The children in the experimental classroom made clinically significant improvements on narrative and vocabulary measures; children in the comparison classroom did not. Within the experimental classroom, children in the high-risk subgroup demonstrated greater gains in narration and fewer gains in vocabulary than children in the low-risk subgroup. There were no subgroup differences in the comparison classroom. CONCLUSION: These preliminary results provide early evidence of the feasibility of implementing a narrative instruction program in a classroom setting. Children at a high risk for language difficulties appeared to profit more from the narrative instruction than from the embedded vocabulary instruction. More extensive research on this instructional program is warranted.
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Statistical Power Analysis for the Behavioral Sciences
Keith E. Muller, Jacob Cohen · Technometrics · 1989 · 83.9K citations