Later, Watson became interested in the work of Ivan Pavlov (1849–1936), and eventually included a highly simplified version of Pavlov's principles in his popular works.
华生后来对伊万·巴甫洛夫（1849-1936)的工作非常感兴趣，后来在他的通俗作品中包括了巴甫洛夫原理的一个高度简化的版本。