We tested the predictions of these three views in a series of experiments in which we measured the benefits from utilizing low-level binaural information for speech perception, and compared it to that predicted from a model of the early auditory system. Direct access to low-level information requires specific conditions, and can be achieved only at the cost of concurrent comprehension. RHT asserts that only the higher levels of the hierarchy are immediately available for perception. We propose a third alternative, based on the Reverse Hierarchy Theory (RHT), originally derived to describe the relations between the processing hierarchy and visual perception. Previous theories suggested either full availability of low-level information or availability that is limited by task difficulty. We now ask whether fine acoustic information, which is not retained at high levels, can still be used to extract speech from noise. Auditory information is processed in a fine-to-crude hierarchical scheme, from low-level acoustic information to high-level abstract representations, such as phonological labels.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |