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Percent Grammatical Responses as a General Outcome Measure: Initial Validity.
Sarita L Eisenberg1, Ling-Yu Guo2,3
1Department of Communication Sciences and Disorders, Montclair State University, Bloomfield, NJ.
Language, Speech, and Hearing Services in Schools
|December 7, 2017
Summary
Percent Grammatical Responses (PGR) effectively measures child grammar skills. This study validates PGR against established grammar measures, showing high correlation and agreement for assessing grammaticality in young children.
Area of Science:
- Linguistics
- Developmental Psychology
- Speech-Language Pathology
Background:
- Assessing child grammar is crucial for identifying language development.
- Existing measures may have limitations in efficiency or scope.
- Percent Grammatical Responses (PGR) offers a potential alternative for grammaticality assessment.
Purpose of the Study:
- To investigate the construct and concurrent validity of Percent Grammatical Responses (PGR) as a measure of child grammaticality.
- To compare PGR with established grammar assessment tools and vocabulary measures.
- To determine the agreement between PGR and Percent Grammatical Utterances (PGU) in classifying grammatical ability.
Main Methods:
- Seventy-nine 3-year-olds participated, providing language samples by describing pictures.
- Percent Grammatical Responses (PGR) was calculated from the response to the first question.
- Percent Grammatical Utterances (PGU) was calculated by segmenting and evaluating all responses for grammatical errors.
Main Results:
- PGR scores showed a significant correlation with a standardized grammar test (r = .70) and vocabulary (r = .11).
- PGR scores were highly correlated with PGU scores (r = .88).
- High agreement was found between PGR and PGU for pass (92%) and fail (94%) decisions.
Conclusions:
- The study establishes the construct validity of PGR for assessing grammar.
- PGR is supported as a valid and reliable measure for evaluating grammaticality in children.
- PGR offers a potentially efficient method for language assessment.
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