The use of primary sentence stress by normal, aphasic, and autistic children.

The team recorded autistic preschoolers while they talked. They also taped two control groups: kids with aphasia and typically developing children. All groups had similar sentence lengths, measured by MLU.

Researchers then counted how often each child put the main stress on the wrong word in a sentence. They wanted to see if autistic kids make unique prosody errors.

Autistic children misplaced sentence stress more often than both other groups. Their errors followed a different pattern, not just more mistakes but new kinds of mistakes.

The finding was negative: the prosody gap stayed even when language level was matched.

Valériel et al. (2019) extends this work. They showed that strength-informed cognitive tests give a fuller picture of minimally verbal autistic preschoolers than standard tools. Together, the papers warn that surface language scores can hide uneven skills.

Kerr et al. (2004) found a similar hidden competence. Their autistic preschoolers failed classic false-belief tasks yet understood thought bubbles, much like the 1987 kids whose stress errors masked intact underlying knowledge. Both studies say, "Look deeper."

Salter et al. (2008) echoes the theme. Autistic children with normal IQs talked about mental states but still missed subtle social meaning in animations. The 1987 acoustic errors and the 2008 narrative gaps both point to fine-grained communication differences, not global deficits.

When you hear odd stress patterns, do not assume poor comprehension. Probe receptive language with visual or strength-based supports, as Valériel et al. suggest. Add prosody goals that target the specific misassignment pattern, not just rate or volume. Document both errors and successes to show insurance the skill is teachable.