The scope of interest aroused by the spontaneous productions of institutionalized psychotics can be gauged in part by a survey of the collections and exhibits of such works which have been recorded. Since investigations on drawing and painting by the insane are relatively numerous, they have been classified for convenience into group surveys and case studies. These two types of studies can usually be differentiated not only on the basis of number of subjects, but also in terms of their general approach. The group surveys are usually concerned with the characterization of insane art in general or the discovery of differentia of the artistic products of different clinical types. The specificity of abnormal behavior has been repeatedly illustrated. Thus it is found that the artistic production of certain psychotics is indistinguishable from that of the normal in both style and content, although the behavior of the patient in other situations may be distinctly abnormal. Instances of this observation have been cited in almost every form of art which has been investigated. The artistic behavior of many insane patients, on the other hand, often reveals many of the specific features found in their other behavior. The study of different forms of artistic expression, including drawing and painting, needlework, plastic art, architecture and interior decoration, music, and literary composition, has yielded results which are similar in many respects. It should be noted that the observations on spontaneous productions by the insane have frequently been described in vague, ambiguous terms and ill-defined, mentalistic concepts which add much confusion to the problem.