Rösler F, Manzey D
Biol Psychol. 1981 Dec;13:3-26. doi: 10.1016/0301-0511(81)90024-7.
Some properties of principal components analysis (PCA) and simple structure rotation, which are relevant to the study of event-related potentials (ERPs), were examined both in theory and with simulated data. The analysis casts some doubt on whether it is useful and desirable to rotate the loading pattern of a PCA of ERPs to simple structure. The evidence presented is more in favour of the unrotated solution. In particular we were able to demonstrate with simulated data that a solution rotated to simple structure may lead to false conclusions about the functional independence of ERP peaks. Beyond this, the more general question is asked of whether principal components should be accepted as basic waveforms, i.e. as physiologically meaningful entities which, for example, represent different ERP generators.
主成分分析（PCA）和简单结构旋转的一些与事件相关电位（ERP）研究相关的特性，在理论和模拟数据方面都进行了检验。该分析对将ERP的主成分分析的载荷模式旋转为简单结构是否有用和可取提出了一些疑问。所提供的证据更支持未旋转的解决方案。特别是，我们能够通过模拟数据证明，旋转到简单结构的解决方案可能会导致关于ERP峰值功能独立性的错误结论。除此之外，还提出了一个更普遍的问题，即主成分是否应被视为基本波形，即作为生理上有意义的实体，例如代表不同的ERP发生器。
