نتایج جستجو برای: down processing
تعداد نتایج: 696085 فیلتر نتایج به سال:
Perception and cortical responses are not only driven "bottom-up" by the external stimulus but are altered by internal constraints such as expectancy or the current behavioral goal. To investigate neurophysiological mechanisms of such top-down effects, we analyzed the temporal interactions of neurons on different levels of the cortical hierarchy during perception of stimuli with varying behavio...
This fMRI study investigated top-down letter processing with an illusory letter detection task. Participants responded whether one of a number of different possible letters was present in a very noisy image. After initial training that became increasingly difficult, they continued to detect letters even though the images consisted of pure noise, which eliminated contamination from strong bottom...
If we are to understand how human perception occurs, then we must first identify the mechanisms that drive perception. It is commonly believed that perception is influenced by both bottom-up processes (raw sensory input), and top-down processes (expectationdriven matching). What is not fully understood is how the human mind uses expectations and assumptions to manipulate what we call conscious ...
the role of orthography in difficult speech perception tasks has already been proved (dehaene & cohen, 2011). since the processing of heterographic homophones is believed to be more difficult than other words (hino & colleagues, 2013), the present study aimed at identifying the role of orthography and word forms in perception of such words during top-down processes, such as speech perception. a...
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