Developmental Sentence Scoring for Preschool Language Sample Analysis: A Psychometric Update

Area of Science:

• Linguistics
• Developmental Psychology
• Speech-Language Pathology

Background:

• Developmental Sentence Scoring (DSS) is a tool used to analyze children's language development.
• Validating DSS's effectiveness across different age groups and diagnostic categories is crucial for its clinical application.
• Previous studies have utilized DSS, but its adaptability to varying sample lengths requires further investigation.

Purpose of the Study:

• To validate the Developmental Sentence Scoring (DSS) tool's ability to differentiate age and diagnostic categories in a large corpus of American English-speaking adult-child interactions.
• To determine if DSS subscales vary by age and diagnostic category.
• To explore the potential for adapting DSS analysis to shorter language samples.

Main Methods:

• Utilized data from 501 children (ages 2-6 years) with a 50-utterance sample criterion and 842 children with a 25-utterance sample criterion from TalkBank.org.
• Employed the Computerized Language Analysis utility for analyzing DSS total and subscale scores.
• Compared grammatical profiles of typically developing children and those with a history of late talking.

Main Results:

• DSS total scores were most informative for younger children; scores converged between typically developing and late-talking children over time.
• The Main Verbs (MV) subscale demonstrated the highest sensitivity.
• Shorter language samples (25 utterances) proved as informative as longer ones (50 utterances).
• DSS scores in this study were generally higher than those previously reported by Lee (1974).

Conclusions:

• Shorter language samples (25 utterances) are sufficient for both diagnostic and therapy planning purposes.
• The DSS, particularly the MV subscale, may be more valuable for identifying therapy targets than for diagnosing language delays.
• Relying on original DSS percentile scores from Lee (1974) might lead to underidentification of children with significant language lags compared to typically developing peers.