To the Editor: —The criticisms expressed by Dr. Kalz concerning the difficulty in evaluating the results of psychiatric treatment are shared by many. Indeed, they could have been written without his reading the article. So far as I am aware, there is noabsolute proofthat psychotherapy is of any value, that one method of teaching is superior to another, or that child-rearing practices are improved by education, in spite of widespread beliefs that they are. I would certainly like an unbiased investigation of the effectiveness of a college psychiatric service, but setting up the necessary conditions would be a formidable task, indeed. Many variables are involved; it would be impractical to try to keep other college policies unchanged while investigating the work of one small segment of the institution; yet not to do so would largely invalidate the results. Favorable changes in drop-out, suicide, and failure rates may result