在模拟的驾驶环境中,大脑中双重任务干扰的时间动态
Seyed-Reza Hashemirad1, Maryam Vaziri-Pashkam2, Mojtaba Abbaszadeh3
1School of Cognitive Sciences, Institute for Research in Fundamental Sciences (IPM), Tehran, Iran.
NeuroImage
|May 15, 2025
概括
由于认知过载,双任务干扰会减缓反应时间. 早期的处理部分是并行的,但后期阶段是瓶,当任务密切重叠时会导致连续延迟.
科学领域:
- 认知神经科学 认知神经科学
- 人与计算机的交互
- 心理学 心理学 心理学
背景情况:
- 双重任务干扰源于大脑有限的认知资源.
- 了解这种干扰的时间动态对于优化任务设计至关重要.
研究的目的:
- 使用脑电图 (EEG) 和先进的分析技术,研究双重任务干扰的时间进程.
- 区分干扰对决策和机动执行阶段的影响.
主要方法:
- 脑电图 (EEG) 结合多变量模式分析 (MVPA) 和漂移扩散建模 (DDM).
- 参与者执行单一和双重任务 (音色歧视和模拟驾驶车道更改) 与不同的刺激发作异步 (SOA).
- 使用 MVPA 的时间和条件概括以及搜索灯分析来检查神经模式稳定性和信息定位.
主要成果:
- 双任务干扰,特别是短 SOA,通过改变决策和决策后过程 (DDM) 增加了反应时间.
- 在短 SOA 条件下,MVPA 显示解码精度降低,神经模式稳定性早在 ~ 250 ms 的时间就被破坏.
- 观察到后期处理阶段 (~450 ms) 的瓶,以及感知到运动区域的任务特定信息减少.
结论:
- 在早期的感知和决策阶段 (~第一个100 ms),任务在部分并行处理.
- 后期的处理阶段 (>~450 ms) 显示了对电机输出的连续竞争,导致性能下降.
- 研究结果阐明了双任务场景中认知瓶的时间展开.
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