METAPHYSICAL STATUS OF FACTORS 243 and even psychologists, are still very apt to assume that what is called the * problem child' has only to be brought to the psychologist's consulting-room, tested, interviewed, and observed as it were in vacuo, and the examiner can then pronounce what is wrong with the child. In the past this tacit assumption was responsible for at least half our failures with the neurotic and the delinquent. The ' problem ' never lies in the ' problem child' alone : it lies always in the relations between that child and his environment. Neither the delinquent child, nor yet the nervous child, nor even, as a rule, the backward child, can be properly understood, unless the examining psychologist has investigated, not only the child himself, but the conditions under which he is living at home, at school, and wherever he spends his leisure hours, and so is able to gauge how the child, on the one hand, and his parents, friends, and teachers, on the other, are constantly interacting. This seems to me to be especially important in obtaining reports on the child's character. Not only for purposes of research, but also for purposes of clinical diagnosis and vocational guidance, the common practice is to request observers to grade persons according to their supposed emotional or moral qualities. But, when we correlate such gradings, we usually find that they throw light on very little else besides the observers' own implicit views. What we ought to grade is the overt behaviour of the per- sons under review, not the presumable qualities of their minds ; and behaviour consists essentially in relations— in relations between the person and the conditions under which he lives. A striking example is to be found in the so-called human instincts, about which so much controversy has been waged. From the standpoint of the individual psychologist, in- stincts are * factors/ not genetic factors but descriptive factors, factors in the logical rather than in the biological sense: they are " little more than convenient headings under which certain reactions to certain stimuli can be recorded." Whether we are to postulate an inherited set of quasi-reflex mechanisms to explain such c instinctive' reactions is a problem belonging to an entirely different