Preperceptual and perceptual organization of sound

描述（由申请人提供） 这项研究将主要在匈牙利进行，作为NIH资助#R01 DC 04263的延伸。拟议的研究的目标是表征的过程，导致不同的声源的感知。我们之前的研究结果（见初步结果）表明，听觉组织的很大一部分发生在知觉前。拟议的研究的目的是确定是否感知隔离的来源是一个单一的过程的结果，或者是否听觉组织经过几个不同的阶段，然后才达到知觉。找到一个不同于知觉组织的前知觉组织将支持多阶段过程的概念。为了实现这一目标，我们将使用事件相关电位（ERPs）的高时间分辨率结合行为方法，在各种实验条件下比较刺激驱动的听觉过程的结果与对相同声音的注意处理产生的感知。这将使我们能够评估听觉组织的处理阶段，并确定有多少知觉组织是严格刺激驱动的，有多少可以通过注意过程改变。FIRCA提案将扩展母基金的具体目标2（“注意力和刺激驱动的感知过程之间的相互作用”）。三个实验提出了解决这一目标。实验1将确定感知声音组织在多大程度上对应于可评估的前感知组织。实验2将研究听觉处理的哪个阶段是多个线索（两组声音在两个或多个听觉特征中的差异）在分离声源中的总和。实验3将测试替代声音组织（即，相同的两组声音的整合和分离的组织）可以在可评估的前感知处理阶段并行存在。

DESCRIPTION (provided by applicant) This research will be done primarily in Hungary as an extension of NIH Grant #R01 DC 04263. The goal of the proposed research is to characterize the processes leading to the perception of distinct sound sources. Our previous results (see Preliminary Results) established that a large part of auditory organization occurs preperceptually. The aim of the proposed research is to determine whether the perceived segregation of sources is the result of a single process or whether auditory organization goes through several distinct phases before reaching perception. Finding a preperceptual organization that differs from the perceived organization would support the notion of a multi-stage process. To reach this goal we will use the high temporal resolution of event-related potentials (ERPs) in conjunction with behavioral methods to compare the outcome of stimulus-driven auditory processes with the perception resulting from attentive processing of the same sounds, across various experimental conditions. This will allow us to evaluate the processing stages of auditory organization and determine how much of the perceptual organization is strictly stimulus driven and how much can he altered by attentional processes. The FIRCA proposal will expand on Specific Aim 2 of the parent grant ("the interplay between attention and stimulus-driven processes in perception"). Three experiments are proposed to address this aim. Experiment 1 will determine to what extent perceptual sound organization corresponds to an assessable preperceptual organization. Experiment 2 will investigate what stage of auditory processing are multiple cues (differences between two sets of sounds in two or more auditory features) summed in segregating sound sources. Experiment 3 will test whether alternative sound organizations (i.e., the integrated and the segregated organizations) of the same two sets of sounds can exist in parallel at an assessable preperceptual processing stage.