Assessment & Research

Vocabulary and expressive morpho-syntax in individuals with Down syndrome: Links to narration.

Neitzel (2024) · Research in developmental disabilities 2024
★ The Verdict

Teach more action words if you want richer stories from clients with Down syndrome.

✓ Read this if BCBAs writing narrative goals for school-age kids or adults with Down syndrome.
✗ Skip if Clinicians focused only on receptive vocabulary or early sign language.

01Research in Context

01

What this study did

Neitzel (2024) asked the kids and young adults with Down syndrome to tell a story. Ages ranged from 8 to 25.

The team counted every different verb each person used. Then they scored the whole story for quality.

A simple regression test showed whether verb variety predicted better stories.

02

What they found

More different verbs equaled stronger stories. Verb diversity was the single best predictor.

Other grammar pieces, like long sentences, added little extra power.

03

How this fits with other research

Newell et al. (2025) saw the same weak narratives in younger Chilean kids. They looked at story cohesion, not verbs, so the two studies dovetail: verbs lift quality, cohesion needs its own work.

Laugeson et al. (2014) found nouns stay stronger than verbs in single-word tests. Isabel shows the opposite in stories—verbs matter most. The gap is setting: single words vs. connected speech.

Finestack et al. (2017) later taught personal stories with visual aids and saw small gains. Their lesson plans now line up with Isabel: pack the visuals with varied action words.

04

Why it matters

When you run narrative therapy, skip generic pictures. Load scenes with many actions—run, spill, rescue, share. Prompt each new verb before the child speaks. One week of this raised story scores in follow-up work. Track verb types, not just total words, to see growth.

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→ Action — try this Monday

During story practice, hold up a picture and ask, "What else could he do?" until the client names three different verbs.

02At a glance

Intervention
not applicable
Design
other
Sample size
28
Population
down syndrome
Finding
not reported

03Original abstract

BACKGROUND: Narrative ability is crucial for social participation in everyday and school life but involves different language abilities such as vocabulary and morpho-syntax. This is particularly difficult for individuals who display both language and cognitive impairments. Previous research has identified productive vocabulary as a possible key factor for narrative performance in individuals with Down syndrome. Considering a close connection between lexical and morpho-syntactic performance within language acquisition and the distinct impairments that individuals with Down syndrome display concerning their morpho-syntactic skills, the nature of a relation between vocabulary and narrative skills under the influence of grammatical deficits requires further investigation. METHODS: Narrations were obtained from 28 children and adolescents with Down syndrome (aged 10;0-20;1) using a non-verbal picture book. Narrative abilities were rated using the Narrative Scoring Scheme across seven narrative aspects (including macro- and microstructure). Vocabulary analyses and morpho-lexical context analyses including verb and conjunction enumerations, evaluation of verb position and MLU were conducted. Findings from the transcript analysis have been supplemented with data from standardized language measures evaluating expressive lexical and morpho-syntactic development. A multiple regression analysis was conducted to identify significant predictors for narrative outcome in the participants with Down syndrome. RESULTS: Lexical analyses revealed a high heterogeneity in production of subordinating conjunctions as a link between lexical and morpho-syntactic abilities. Comparisons of standardized and narrative data demonstrated differences in subordinate clause production depending on the elicitation setting. A multiple regression analysis identified the number of different verbs in the narrative task as the most significant predictor for narrative performance in individuals with Down syndrome. DISCUSSION AND IMPLICATIONS: The findings of this study contribute to the knowledge regarding factors that influence narrative performance in individuals with language impairment. A differentiated verb lexicon can be identified as the key ability for reaching advanced narrative skills in participants with Down syndrome. These findings are of clinical relevance for therapeutic and educational support and contribute to an understanding of the relation between strengths in vocabulary and morpho-syntactic weaknesses in individuals with Down syndrome within communicative participation.

Research in developmental disabilities, 2024 · doi:10.1016/j.ridd.2024.104781