Asynchronous P300-Based Brain-Computer Interface to Control a Virtual Environment: Initial Tests on End Users
Asynchronous P300-Based Brain-Computer Interface to Control a Virtual Environment: Initial Tests on End Users
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DOI：
10.1177/155005941104200406
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发表时间：
2011-10-01
影响因子：
2
通讯作者：
Cincotti, Febo
中科院分区：
文献类型：
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作者：
Aloise, Fabio;Schettini, Francesca;Cincotti, Febo
运动残疾和/或老龄化可能使个人无法充分享受家庭设施，从而使他们的生活质量恶化。家用电器的可访问用户界面领域的进展可以代表提高这些人的独立性的有价值的方法。最近，一种基于p300的异步脑机接口（BCI）系统在健康青年志愿者的参与下进行了环境控制验证。在这项研究中，基于p300的异步脑机接口与虚拟家庭环境的交互在潜在终端用户（弗里西亚家庭护理组织的客户）的参与下进行了测试，这些用户由于老龄化和/或运动残疾而具有有限的自主权。系统测试显示，与之前在年轻对照组中观察到的结果相比，在潜在最终用户中，实现正确分类所需的最小刺激序列数量具有更高的受试者内部变异性。在这里，我们展示了异步模式在不断调整其速度以适应用户状态方面比同步模式表现得更好。此外，异步系统模式证实了其在避免误分类和误报方面的可靠性，正如先前在年轻健康受试者中所显示的那样。异步模式可能有助于填补脑机接口系统和传统输入设备之间的可用性差距，代表着在日常生活活动中使用它们的重要一步。
Motor disability and/or ageing can prevent individuals from fully enjoying home facilities, thus worsening their quality of life. Advances in the field of accessible user interfaces for domotic appliances can represent a valuable way to improve the independence of these persons. An asynchronous P300-based Brain-Computer Interface (BCI) system was recently validated with the participation of healthy young volunteers for environmental control.In this study, the asynchronous P300-based BCI for the interaction with a virtual home environment was tested with the participation of potential end-users (clients of a Frisian home care organization) with limited autonomy due to ageing and/or motor disabilities. System testing revealed that the minimum number of stimulation sequences needed to achieve correct classification had a higher intra-subject variability in potential end-users with respect to what was previously observed in young controls. Here we show that the asynchronous modality performed significantly better as compared to the synchronous mode in continuously adapting its speed to the users' state. Furthermore, the asynchronous system modality confirmed its reliability in avoiding misclassifications and false positives, as previously shown in young healthy subjects.The asynchronous modality may contribute to filling the usability gap between BCI systems and traditional input devices, representing an important step towards their use in the activities of daily living.