基于拉塞尔模型和生理测量的情感状态估计
Roberto Cittadini1, Christian Tamantini2, Francesco Scotto di Luzio2
1Research Unit of Advanced Robotics and Human-Centred Technologies, Department of Engineering, Università Campus Bio-Medico di Roma, Rome, Italy. r.cittadini@unicampus.it.
Scientific reports
|June 16, 2023
概括
这项研究确定了一组最佳的13个生理特征和K-Nearest Neighbors (KNN) 算法,用于准确的实时情感状态估计,提高分类的准确性和速度.
科学领域:
- 心理生理学 心理生理学
- 机器学习 机器学习
- 情感计算是一种情感计算.
背景情况:
- 情感状态是连接精神和生理过程的心理生理学构造,通常使用唤起和价值模型来建模.
- 从生理信号中提取情绪状态是具有挑战性的,因为缺乏最佳特征集和高效的分类方法.
- 情绪状态的实时估计需要可靠和计算效率高的方法.
研究的目的:
- 定义一种可靠和有效的实时情感状态估计方法.
- 确定一种最佳的生理特征集,用于对情绪状态进行分类.
- 确定对二进制和多类情感状态估计的最有效的机器学习算法.
主要方法:
- 利用ReliefF特征选择算法将23个生理特征减少到13个最佳集.
- 实施并比较监督学习算法:K-最近邻居 (KNN),支持矢量机 (SVM) 和线性差异分析 (LDA).
- 在20名接受国际情感图像系统 (IAPS) 刺激的志愿者的生理信号上测试了这种方法.
主要成果:
- ReliefF算法成功地将功能集从23减少到13,从而提高了分类性能.
- 使用最佳特征集,准确性和估计时间都得到了显著改善.
- 与SVM和LDA相比,K-最近邻居 (KNN) 算法在实时情感状态估计方面表现出优异的性能.
结论:
- 13个已识别的最佳生理特征和KNN分类器的组合为实时情感状态估计提供了有效的方法.
- 这种方法提供了更高的准确性和更短的估计时间,解决了当前文献中的局限性.
- 这些发现支持使用KNN与精选的生理特征在情感计算中的实际应用.
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