Revisiting the simplification of adult language input in the context of naturalistic developmental behavioral interventions: A commentary.

Frost et al. (2022) wrote a commentary, not an experiment. They asked a question: Should adults use short, simple sentences or full, natural sentences when running NDBI with autistic toddlers?

The authors reviewed past advice to ‘simplify language’ and said we need new studies to test if that really helps kids learn more words.

The paper does not give new data. It simply warns that oversimplified adult talk might limit what toddlers hear and learn.

They urge researchers to compare natural, grammar-rich input against cut-down speech in future NDBI trials.

Choi et al. (2020) seems to disagree. They saw that parents who used shorter sentences at 18 months had children with stronger language at 24 months. This looks like a contradiction, but the kids were younger and not yet in full NDBI programs.

D’Agostino et al. (2023) extend the call. Their review repeats the need for better language-input studies and adds staff-training tips so the new findings can reach clinics.

Green et al. (1987) and Bachman et al. (1988) are early roots. These studies used rich, natural adult talk during play and still got big language gains, showing the idea is not new.

If you run NDBI, keep your language clear but do not chop every sentence down to two words. Stay tuned for trials that Frost et al. hope will show whether fuller sentences speed vocabulary growth. Until then, mix brief labels with longer, natural phrases so toddlers hear both.