With or without Feedback?-How the Presence of Feedback Affects Processing in Children with Developmental Language...

Area of Science:

• Cognitive Neuroscience
• Developmental Psychology
• Linguistics

Background:

• Language acquisition relies on processing probabilistic information and feedback.
• Children with developmental language disorder (DLD) show deficits in probabilistic learning and feedback processing.
• The distinct impacts of these deficits on DLD are not well understood.

Purpose of the Study:

• To investigate how feedback influences probabilistic learning in school-aged children with DLD.
• To compare behavioral and neurophysiological responses between children with DLD and typically developing (TD) children under conditions with and without feedback.
• To elucidate the specific role of feedback processing in learning for children with DLD.

Main Methods:

• A visual probabilistic classification learning task was administered to children with DLD (n=29) and TD children (n=44).
• The task was presented in two versions: one with trial-by-trial performance feedback and one without feedback.
• Event-related potentials (ERPs) were recorded to analyze neural processing during the task.

Main Results:

• Typically developing children showed higher accuracy with feedback compared to children with DLD.
• Both groups performed similarly on the feedback-free task.
• Neurophysiological data revealed differences in brain activity (parietal slow wave, late parietal component) between groups only when feedback was present.

Conclusions:

• Feedback enhances learning in typically developing children but not in children with DLD.
• When feedback processing is removed, children with DLD exhibit behavioral and neural patterns similar to their TD peers.
• These findings suggest that difficulties in feedback processing uniquely impair learning in DLD, even when probabilistic learning abilities are otherwise comparable.