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A new eye-tracking method to assess attention allocation in individuals with and without aphasia using a dual-task paradigm.

机译：一种新的眼动追踪方法，使用双任务范式评估有无失语症患者的注意力分配。

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摘要

In addition to language impairments, individuals with aphasia frequently have difficulties allocating attention that contribute to language processing, as it has been assessed repeatedly using dual-task experiments. The goal of this study was to develop a method to assess attention allocation during auditory linguistic processing using eye tracking in a dual-task paradigm.;A dual-task experiment included an auditory linguistic processing task, in which sentences were presented auditorily, and a visual search task, in which participants were trained to find a visual target in a display that included one target and three nontarget foils. Attention demands were manipulated by varying the complexity of each of the two tasks. Changes in attention demands were indexed through performance on the visual search task using eye-tracking measures. Thirty-three adults with aphasia participated and 34 adults free of neurogenic impairments served as control participants.;Significant increases in attention demands were observed from single- to dual-task conditions and from simple to complex verbal and visual stimulus processing, indicated through decreases in the following eye-tracking measures: proportion of fixation duration on the target (PFDT), proportion of number of fixations on the target (PNFT), average fixation on the target (AFDT), first-pass gaze duration on the target (FPGDT); and latency until first fixation on the target (LFFT). Significant differences between participant groups indicated that individuals with aphasia have greater difficulty allocating attention properly according to task demands on linguistic and nonlinguistic tasks. These results are consistent with findings described in other studies indicating that individuals with aphasia have significantly greater difficulty than controls in allocating attention. PFDT and PNFT most consistently indexed changes in attention allocation. Correlations between aphasia severity as indexed by the aphasia quotient from the revised Western Aphasia Battery (WAB-R, Kertesz, 2007) and eye-tracking measures were nonsignificant, suggesting that attention allocation is a cognitive process dissociated from language comprehension. Results support the validity of a novel eye-tracking method as a tool to assess attention allocation in individuals with and without aphasia.
机译：除了语言障碍外，失语症患者也经常难以分配注意力以促进语言处理，因为已经使用双任务实验对其进行了反复评估。这项研究的目的是开发一种在双任务范式中使用眼动追踪评估听觉语言处理过程中注意力分配的方法。一项双任务实验包括一个听觉语言处理任务，其中听觉上呈现句子，视觉搜索任务，其中训练了参与者以在包含一个目标和三个非目标箔的显示器中找到视觉目标。通过改变两个任务中每个任务的复杂性来操纵注意力需求。通过使用眼动追踪方法在视觉搜索任务上的表现来索引注意力需求的变化。 33名失语症成年人参加了实验，有34名无神经源性障碍的成年人作为对照参加者；从单任务到双重任务条件以及从简单到复杂的言语和视觉刺激过程观察到注意需求显着增加，通过减少以下眼动追踪措施：对目标的注视持续时间的比例（PFDT），对目标的注视次数的比例（PNFT），对目标的平均注视（AFDT），对目标的首过凝视时间（FPGDT） ;和等待时间，直到第一次将目标固定在目标上（LFFT）。参与者组之间的显着差异表明，失语症患者根据语言和非语言任务的任务要求正确分配注意力的难度更大。这些结果与其他研究中描述的发现一致，这些研究表明失语症患者在分配注意力方面比对照组明显困难得多。 PFDT和PNFT最一致地索引注意力分配的变化。经修订的Western Aphasia Battery（WAB-R，Kertesz，2007）的失语症指数与失语程度之间的相关性不显着，这表明注意力分配是与语言理解脱节的认知过程。结果支持了一种新颖的眼动追踪方法作为评估患有或不患有失语症患者注意力分配的工具的有效性。

著录项

  • 作者

    Heuer, Sabine.;

  • 作者单位

    Ohio University.;

  • 授予单位 Ohio University.;
  • 学科 Health Sciences Speech Pathology.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 156 p.
  • 总页数 156
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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