Attention and Aphasia: Identifying the Role of Binding

描述(由申请者提供)：这个项目旨在评估语言中知觉绑定(结合身份和位置信息)的作用，以及注意限制可能如何影响这一作用。这包括在需要绑定的任务和不需要绑定的任务上观察中风患者和非中风患者的行为过程。因此，该项目的具体目标集中在确定失语症患者在需要约束的任务中是否比那些不需要约束的人执行得更准确。这个项目的长期目标是更好地理解绑定和注意在语言中的作用，这将导致对这些过程的功能神经认知基础的进一步成像研究。总而言之，这些行为任务提供了补充数据，应该可以更完整地展示失语症患者的注意力和捆绑过程。实验1旨在调查失语症患者和非脑损伤对照个体在需要约束的任务中是否存在灭绝现象。实验2将使用与实验1相同的刺激；但是，将不再需要绑定。在这些任务中，失语症患者和对照参与者将只被要求进行计数，因此不必将身份识别和本地化捆绑在一起。实验3将控制要分配的资源量，同时仍不需要绑定。这将通过让患者识别和计算呈现的项目来实现，而不是本地化。通过研究注意力和束缚在失语症中的作用，可能会对可能导致失语症的潜在缺陷有进一步的理解。此外，通过更好地了解失语症的理论基础，这些信息可能会对该领域产生影响，从而进一步制定有效和有效的康复战略。

DESCRIPTION (provided by applicant): This project is designed to assess the role of perceptual binding (combining identity and location information) in language and how attentional constraints may affect this. This includes looking at behavioral processes in stroke and non-stroke individuals on tasks that require binding as well as tasks that do not require binding. Accordingly, the specific aims of the project focus on determining if individuals with aphasia perform less accurately on tasks that require binding versus those that do not. The long-term goal of this project is to provide a better understanding of the role of binding and attention in language, which will lead to further imaging studies of the functional neurocognitive underpinnings for these processes. Together, these behavioral tasks provide complimentary data that should demonstrate a more complete picture of the processes of attention and binding in individuals with aphasia. Experiment 1 is designed to investigate whether the phenomenon of extinction is present for individuals with aphasia and non-brain damaged controls on tasks that require binding. Experiment 2 will use the same stimuli from Experiment 1; however, binding will no longer be required. On these tasks, individuals with aphasia and control participants will be required to count only and will therefore not have to bind together identification and localization. Experiment 3 will control for the amount of resources to be allocated, while still not requiring binding. This will occur by having patients identify and count the items presented, as opposed to localizing. By investigating the role of attention and binding in aphasia, a further understanding of the underlying deficits that may contribute to aphasia may emerge. In addition, such information could impact the field by leading to further development of efficient and efficacious rehabilitation strategies through a better understanding of the theoretical underpinnings of aphasia.