The word suggestion is used here to denote an influence that works in a comparatively mechanical or reflex way, without calling out that higher selective activity of the mind implied in choice or will. Thus the hypnotic subject who performs apparently meaningless actions at the word of the operator is said to be controlled by suggestion; so also is one who catches up tricks of speech and action from other people without meaning to. From such instances the idea is extended to embrace any thought or action which is mentally simple and seems not to involve choice. The behavior of people under strong emotion is suggestive; crowds are suggestible; habit is a kind of suggestion, and so on. I prefer this word to imitation, which some use in this or a similar sense, because the latter, as ordinarily understood, seems to cover too little in some directions and too much in others. In common use it means an action that results in visible or audible resemblance. Now although our simple reactions to the influence of others are largely of this sort, they are by no means altogether so; the actions of a child during the first six months of life, for instance, are very little imitative in this sense; on the other hand, the imitation that produces a visible resemblance may be a voluntary process of the most complex sort imaginable, like the skilful painting of a portrait. However, it makes little difference what words we use if we have sound meanings back of them, and I am far from intending to find fault with writers, like Professor Baldwin and M. Tarde, who adopt the word and give it a wide and unusual application. For my purpose, however, it does not seem expedient to depart so far from ordinary usage.