Correlates of perceptual asymmetries in dichotic listening

我的建议关注的是听觉通道中的知觉不对称。我的研究计划的这一部分的长期目标是描述影响知觉不对称的因素，以努力了解它们潜在的神经功能和认知原因。我的建议的主要理论基础来自Hugdahl(2000)提出的模型，根据该模型，在任何任务中观察到的知觉不对称反映了自下而上成分和自上而下成分的组合。自下而上的方面反映了刺激内容和大脑组织，而自上而下的方面指的是注意效应。然而，我建议在自上而下的部分中应该包括其他因素。有许多调查符合短期目标，即调查知觉不对称中的自下而上过程，我计划在授权期内进行调查。在一项研究中，听觉任务将从它们具有重要记忆成分的角度进行检查。我之前的相关工作表明，目标刺激和反应之间的延迟会影响听觉不对称的大小和反应的模式。这些发现可以通过排练及其在观察到的效果中的作用来解释。本实验将通过语言刺激和非语言刺激对提取前延迟的操纵来考察记忆成分(尤其是复述)在二分听力中的行为表现。在这方面的研究中，我还将更密切地关注双反应情况下的报告顺序，以对决策阶段在听觉不对称中的潜在作用进行理论推导。第二项研究将继续我在二分听背景下开始的关于跨通道情感启动的工作。我和我的学生证实，启动可能是一种自上而下的刺激，可以影响观察到的听觉不对称。一系列实验将把基本发现扩展到单反应二分任务、单峰启动以及语言和非语言刺激。我的提案中的第三个研究领域将集中在情感体现在知觉不对称背景下的潜在作用。这项工作将涉及在完成双耳和双耳听力任务期间操纵运动因素。根据可用空间的不同，可能会描述其他调查领域。这项研究的最终目标是确定提供有效和可靠的感知不对称性测量的任务，用于对癫痫和脑肿瘤等神经损伤患者的术前筛查。因此，本研究对脑功能专门化的测量具有很强的潜在意义，同时也有助于知觉不对称模型的建立。

My proposal focuses on perceptual asymmetries in the auditory modality. The long-term objective of this component of my research program is to characterize the factors affecting perceptual asymmetries in an effort to understand their underlying neuro-functional and cognitive causes. The main theoretical foundation for my proposal stems from the model proposed by Hugdahl (2000) according to which the observed perceptual asymmetry in any task reflects a combination of a bottom-up component and a top-down component. The bottom-up aspect reflects stimulus content and cerebral organization, whereas the top-down aspect refers to attentional effects. However, I am proposing that other factors should be included in the top-down component. There are a number of lines of inquiries meeting the short-term objective of investigating bottom-up processes in perceptual asymmetries that I plan to pursue during the granting period. In one line of research, auditory tasks will be examined from the perspective that they have a significant memory component. My previous work of relevance suggests that a delay between target stimuli and response affects the magnitude of auditory asymmetries as well as the pattern of responding. These findings can be explained by rehearsal and its role in the observed effects. The experiments proposed in this line of research will investigate behavioral manifestations of components of memory (especially rehearsal) in dichotic listening through the manipulation of delay before retrieval with verbal and nonverbal stimuli. In this line of research, I will also focus more closely on order of report in the two-response situation to theorize on the potential role of the decision stage in auditory asymmetries. A second line of research will continue the work that I started on cross-modal affective priming in the context of dichotic listening. My student and I established that priming might work as a top-down stimulus to affect the observed auditory asymmetries. A series of experiments will extend the base findings to a one-response dichotic task, to unimodal priming, and to verbal and nonverbal stimuli. A third area of research in my proposal will focus on the potential role of the embodiment of emotions in the context of perceptual asymmetries. This line of work will involve the manipulation of motor factors during the completion of binaural and dichotic listening tasks. Other areas of inquiry might be described, depending on available space. The ultimate goal of this research is to identify tasks that provide valid and reliable measurement of perceptual asymmetries for use in the pre-surgery screening of patient with neurological impairments such as epilepsy and brain tumors. Thus, this research has strong potential significance relevant to the measurement of functional cerebral specialization while also contributing to models of perceptual asymmetries.