How pupillary responses reflect the predictability of word stress in Turkish


Uzun İ. P.

Speech Prosody, Leiden, Hollanda, 11 Mart 2024, ss.1-5

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Leiden
  • Basıldığı Ülke: Hollanda
  • Sayfa Sayıları: ss.1-5
  • Ankara Üniversitesi Adresli: Evet

Özet

Processing of word stress is a complex mechanism that has an impact on prosodic information, the predictability of speakers’ native language, and their sensitivity to shifting stress positions. It is still unclear whether the complexity arises in response to alternations in Turkish stress patterns and whether they exhibit sensitivity to syllable structure. To address these questions, two studies were designed to focus on the pupil dilation response (PDR), a measure employed as a proxy for cognitive load. The current study examined the changes in pupil size with forty-six native Turkish speakers. In Experiment 1, 30 CV.CV.CV words were used with canonical final stress and 30 words in a 2×3 design with penultimate stress pronounced with final, medial, and initial stress types each. In Experiment 2, a syllable weight factor was added by using 30 CVC.CV.CV words in a 3×3 design from each of the three stress types with shifts to other syllables. The LME models showed that the changes from exceptional stress to a default final position do not directly cause increased PDR for Experiment 1. However, the results for Experiment 2 suggest that syllable weight is sensitive to PDR and plays a significant role in cognitive processing.