Investigating common properties of across-channel processing in space, time and speech perception

[C] Across-channel processing in perception of germinates and vision

The notion of across-channel processing is extended to the perception of geminates and to vision. Geminates, known also as “sokuon” in Japanese, are gaps or silent periods of 100 msec or more. They are much longer in length than VOT’s and longer than the gap threshold found for between-frequency gap detection. Geminates are bounded by phonemes of differing frequency components, drawing a parallel with between-frequency gap detection. Although the perception of geminates is often studied in terms of language comprehension and acquisition (Sadakata & Sekiyama, 2011), in this project we investigate it in context of across-channel processing. For visual across-channel processing, we employ gap detection between two stimuli of different channels in spatial frequency and spectral domains.