Sohlberg McKay Moore, Fickas Stephen, Hung Pei-Fang, Fortier Andrew
Communication Disorders & Sciences, University of Oregon, Eugene, OR 97403, USA.
Brain Inj. 2007 May;21(5):531-8. doi: 10.1080/02699050701311000.
Navigational skills are fundamental to community travel and, hence, personal independence and are often disrupted in people with cognitive impairments. Navigation devices are being developed that can support community navigation by delivering directional information. Selecting an effective mode to provide route-prompts is a critical design issue. This study evaluated the differential effects on pedestrian route finding using different modes of prompting delivered via a handheld electronic device for travellers with severe cognitive impairments.
A within-subject comparison study was used to evaluate potential differences in route navigation performance when travellers received directions using four different prompt modes: (1) aerial map image, (2) point of view map image, (3) text based instructions/no image and (4) audio direction/no image.
Twenty travellers with severe cognitive impairments due to acquired brain injury walked four equivalent routes using four different prompting modes delivered via a wrist-worn navigation device. Navigation scores were computed that captured accuracy and confidence during navigation.
Results of the repeated measures Analysis of Variance suggested that participants performed best when given prompts via speech-based audio directions. The majority of the participants also preferred this prompting mode. Findings are interpreted in the context of cognitive resource allocation theory.
导航技能是社区出行的基础，因此对个人独立性至关重要，而认知障碍患者的导航技能常常受到干扰。目前正在研发导航设备，通过提供方向信息来支持社区导航。选择一种有效的方式来提供路线提示是一个关键的设计问题。本研究评估了通过手持电子设备为重度认知障碍旅行者提供不同提示方式对行人寻路的不同影响。
采用受试者内比较研究，评估旅行者在使用四种不同提示方式接收方向指引时，路线导航表现的潜在差异：（1）航拍地图图像；（2）视角地图图像；（3）基于文本的指示/无图像；（4）语音指示/无图像。
20名因后天脑损伤导致重度认知障碍的旅行者，使用腕戴式导航设备，通过四种不同的提示方式走完四条等效路线。计算导航得分，以获取导航过程中的准确性和信心。
重复测量方差分析结果表明，参与者在接受基于语音的音频指示提示时表现最佳。大多数参与者也更喜欢这种提示方式。研究结果在认知资源分配理论的背景下进行了解释。
