偷偷的情绪:数据分区在情感计算实验中对脑-计算机接口的影响
Yoelvis Moreno-Alcayde1, V Javier Traver1, Luis A Leiva2
1Institute of New Imaging Technologies, Universitat Jaume I, Av. Vicent Sos Baynat, s/n, Castellón, 12071 Castellón Spain.
Biomedical engineering letters
|January 8, 2024
概括
数据分区显著影响大脑计算机接口 (BCI) 模型的情感识别性能. 适当的数据分割对于使用脑电图 (EEG) 数据的机器学习应用程序的可靠结果至关重要.
科学领域:
- 神经科学和机器学习
- 计算神经科学是一种神经科学.
- 情感计算是一种情感计算.
背景情况:
- 大脑计算机接口 (BCI) 显示出使用机器学习 (ML) 的情感识别潜力.
- 在培训/测试分区中的数据分区对BCI研究结果的影响往往被忽视.
- 这种监督使得将结果归因于模型改进而不是数据分割器件的复杂化.
研究的目的:
- 引入和利用"数据传输速率"概念来分析BCI中的数据分区效应.
- 为了研究不同的数据分割策略如何影响使用EEG信号的情绪识别性能.
- 为管理和报告BCI研究中的大脑数据分区提供指导方针.
主要方法:
- 引入了"数据传输速率"结构,量化了培训和测试数据之间的重叠.
- 在三个数据分区条件下,从视频中的脑电图 (EEG) 信号中检查了情绪识别:主体独立,视频独立和基于时间的分割.
- 在不同的分区策略中评估了分类准确度的变化.
主要成果:
- 基于数据分区方法,模型性能差异很大 (50% - 90%准确度).
- 独立于受试者 (情感解码) 的表现保持在接近基线的水平,除非受试者的数据被纳入培训.
- 视频独立 (情感注释) 的表现在训练和测试数据共享同一主题时得到改善,即使有不同的视频.
- 后来的EEG信号段更具歧视性,但数据点的数量是最关键的因素.
结论:
- 数据分区是影响BCI在情绪识别任务中的表现的关键因素.
- 特定的分区策略更适合不同的BCI应用程序 (例如,情感解码与注释).
- 对数据分区方法的标准化报告对于可重复性和BCI研究结果的准确解释至关重要.
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