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Distributional Learning in College Students With Developmental Language Disorder.

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Area of Science:

  • Linguistics
  • Psychology
  • Neuroscience

Background:

  • Developmental Language Disorder (DLD) affects language acquisition in some individuals.
  • Understanding how individuals with DLD process novel linguistic information is crucial for educational and therapeutic interventions.
  • Previous research highlights the importance of distributional information in language learning for typically developing populations.

Purpose of the Study:

  • To investigate the capacity of college students with DLD to learn grammatical category membership using distributional cues in an artificial language.
  • To compare the learning abilities of students with DLD to their typically developing (TD) peers in processing novel linguistic structures.
  • To determine if individuals with DLD can generalize learned grammatical rules from explicit training.

Main Methods:

  • An artificial grammar learning paradigm was employed with 17 college students with DLD and 17 TD college students.
  • Participants were trained on an artificial language, with specific word combinations excluded during the training phase.
  • Testing involved assessing participants' ability to identify grammatical vs. ungrammatical word combinations based on learned category membership, even for novel sequences.

Main Results:

  • College students with DLD demonstrated comparable performance to TD peers in discriminating between grammatical and ungrammatical word combinations.
  • No significant differences were observed in the ability to distinguish valid from invalid sequences based on learned grammatical categories.
  • Participants in both groups successfully utilized learned category information to make judgments about novel word combinations.

Conclusions:

  • The findings suggest that college students with DLD can effectively form grammatical categories from novel input.
  • Individuals with DLD demonstrate the ability to leverage distributional information for language learning, similar to their TD counterparts.
  • This study supports the notion that core mechanisms for learning grammatical structure from statistical patterns are intact in college students with DLD.