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Fey, Marc E.; Leonard, Laurence B.; Bredin-Oja, Shelley L.; Deevy, Patricia – Journal of Speech, Language, and Hearing Research, 2017
Purpose: Our purpose was to test the competing sources of input (CSI) hypothesis by evaluating an intervention based on its principles. This hypothesis proposes that children's use of main verbs without tense is the result of their treating certain sentence types in the input (e.g., "Was 'she laughing'?") as models for declaratives…
Descriptors: Linguistic Input, Hypothesis Testing, Intervention, Form Classes (Languages)