Lexical and Morphosyntactic Profiles of Autistic Youth With Minimal or Low Spoken Language Skills.

Researchers studied the speech patterns of 49 autistic young people who use very few words (under 200). They found that those who knew more words didn't necessarily use more nouns and action words, but they did make longer sentences and use more grammar rules. This helps us understand how minimally speaking autistic youth develop language skills and could improve how we support their communication.

This study examined the language patterns of 49 autistic youth aged 6-21 years who used fewer than 200 words, taking a strengths-based approach to understand their communication abilities. Using systematic language analysis, researchers investigated relationships between vocabulary size (number of different words) and various language features including word types, sentence length, and grammatical structures. Key findings revealed that youth with larger vocabularies did not necessarily use more nouns and verbs proportionally, but did produce longer utterances and more early grammatical forms. This suggests that morphosyntactic development (grammar and sentence structure) aligns better with vocabulary level than lexical profiles (word types) in minimally verbal autistic youth.

Findings suggest speech-language pathologists should focus on morphosyntactic development rather than just increasing noun and verb vocabulary when working with minimally verbal autistic youth. Assessment and intervention approaches may need to be tailored to account for atypical lexical development patterns in this population.

Study design and specific methodological details are not provided in the abstract. Sample characteristics beyond age range and vocabulary criteria are unclear. Causal relationships cannot be established from this descriptive analysis.

Autistic youth who are minimally or low verbal are underrepresented in research leaving little to no evidence base for supporting them and their families. To date, few studies have examined the types of words and word combinations these individuals use. The purpose of this study was to take a strengths-based approach to outline descriptive profiles of autistic youth who use few words and elucidate the lexical and morphosyntactic features of their spoken language. We analyzed language samples from 49 autistic youth ages 6-21 years who used fewer than 200 words.

Systematic Analysis of Language Transcripts was used to investigate the relationship between number of different words (NDW) and proportion of nouns and verbs (vs. other word classes), mean length of utterance in morphemes (MLUm), and the frequency of early developing morphosyntactic structures. We used linear regression to quantify the relationship between NDW and lexical and morphosyntactic features. Proportion of nouns and verbs produced did not increase significantly in those with higher NDW. Conversely, MLUm and the frequency of early developing morphosyntactic structures increased significantly in those with higher NDW.

Youth with higher NDW did not produce more nouns and verbs, suggesting lexical profiles that are not aligned with spoken vocabulary level. Youth with higher NDW had higher MLUm and more early morphosyntactic forms, suggesting that morphosyntactic profiles align with spoken vocabulary level. We discuss the implications for improving clinical services related to spoken language.