Akademik Veri Yönetim Sistemi
12. Uluslararası Katılımlı Odyoloji ve Konuşma Bozuklukları Kongresi, Ankara, Türkiye, 9 - 11 Ekim 2024, ss.39, (Özet Bildiri)
Abstract
Background: Dichotic listening has been widely used in research on the hemisphere-specific
specialization of language. The Right-ear Advantage (REA), which represents left hemisphere
speech sound perception specialization, is a common finding.
Aim: The REA is known to be influenced by acoustic/phonetic characteristics of the stimuli, such
as voice onset time (VOT) and place of articulation (POA). As Turkish is not a member of the
same language family as the languages usually used in VOT and POA studies, this study
examines the impact of these features on the REA in Turkish.
Methods: 95 participants (45 males; mean age: 25.81 ± 8.50 years) were analysed for the study.
The participants were native Turkish speakers. They had no upper respiratory tract infection in
the last one month or no neurologic, psychiatric, or neurovascular diagnoses prior to the study.
Subjects reporting inter-aural acuity difference and/or displaying inter-aural threshold difference
of 10 dB or higher were excluded.
Results and Conclusion: Prevoiced consonants had higher REA and were more dominant than
consonants with long VOT. When compared to other consonants, velar consonants were more
prevalent. Compared to bilabial consonants, velum and alveolar consonants produced higher
REA values. When the consonants' POA varied but not their VOT, lateralization and error rates
decreased. The VOT feature of the consonant presented to the right ear largely determined the
error responses. The findings suggest that there may be a difference between the language-
families employed in dichotic listening studies; however, when comparing across languages, care
should be taken to account for variations in the stimuli.