All modes of sense experience may be represented in imagery. •But visual images are most common; then, in descending order of frequency comes auditory, touch and tempera ture, pain, taste and smell, and finally kinaes thetic and organic images. Kinaesthetic im agery is so similar to kinaesthetic sensation that it is distinguished with difficulty, and auditory imagery so frequently occurs con comitantly with throat-kinmsthesis that the existence of pure auditory imagery has mis takenly been called into question.
Finally there is large individual variation in the nature and frequency of characteristic imagery: In some individuals imagery is clean cut and intensive; in others indistinct and weak. Again, in some individuals nearly all forms are experienced; in others scarcely any imagery is to be discovered. It has been found, however, that an individual's imagery tends to conform to one of four types. There is first a versatile type which employs visual, auditory and verbal-ldnmsthetic images without prefer ence for any one. Secondly, there is a visual
type in which visual imagery is predominant although verbal-kinaesthetic imagery is also used. Thirdly, there is an auditory-kinaesthetic type, and finally, an almost purely verbal kinaesthetic type. It should be remarked, how ever, that these types are only approximations. The kind of imagery which an individual em ploys at any given moment depends in large part upon such varying conditions as age, mental habits and the circumstances of that moment.
Bibliography.— Binet, A.,