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Discriminating Non-Native Segmental Length Contrasts Under Increased Task Demands.

Yuki Asano1

  • 1University of Tübingen, Germany.

Language and Speech
|October 14, 2017
PubMed
Summary

Second language prosody perception is vulnerable to task demands. While learners maintain abilities, non-learners struggle with memory load and attention, impacting real-world listening.

Keywords:
GermanJapaneseTask demandsdiscrimination of non-native consonant length

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Area of Science:

  • Linguistics
  • Psycholinguistics
  • Phonetics

Background:

  • Second language (L2) learners often struggle with auditory perception in noisy or complex environments.
  • Prosody, including features like consonant length, plays a crucial role in L2 intelligibility.
  • Understanding the impact of cognitive load on L2 phonological perception is vital for effective language acquisition.

Purpose of the Study:

  • To investigate the vulnerability of L2 prosody perception to increased cognitive demands.
  • To compare the effects of memory load and attention control on Japanese consonant length discrimination by German learners and native speakers.
  • To determine how acoustic complexity influences L2 phonological perception.

Main Methods:

  • German learners of Japanese, German non-learners, and Japanese native listeners discriminated consonant length contrasts.
  • Cognitive load was manipulated by varying inter-stimulus interval (memory load) and adding acoustic complexity (attention control).
  • Vowel length contrasts served as a control condition.

Main Results:

  • All groups showed high discrimination at low task demands.
  • Increased demands significantly impaired non-native listeners' discrimination.
  • German non-learners were affected by both memory load and attention demands; learners were only affected by attention demands.
  • Acoustic complexity had a greater negative impact than increased memory load.

Conclusions:

  • L2 learners develop novel phonological representations but struggle to access them under distraction.
  • Reduced sensitivity to prosodic cues under cognitive load explains difficulties in real-world L2 listening.
  • Task-irrelevant acoustic information poses a significant challenge for L2 perception, even for advanced learners.