In this short sketch of what--from the results of psycho-analytic and other investigations--we may regard as the normal development of the individual mind in regard to the family relationships, we have hitherto been concerned more particularly with the sexual emotions and tendencies, using the word sexual in the wide sense current among writers of the psycho-analytic school. This has been the case, partly because in our account we have been largely governed by historical considerations with regard to the actual chronology of recent psychological progress in this field (and it was chiefly the sexual aspects of the family relationships that were first brought to light in the course of this progress); partly also because it is with regard to these sexual aspects that the increase of our knowledge through the application of new psychological methods has been in many ways the most extensive, the most startling and the most difficult to assimilate. The results considered in the last two chapters are of such a nature as to have been for the most part unrealised and unsuspected either by the professional psychologist or by the ordinary student of human nature: they are, indeed, of such a kind as could only be obtained by means of a special technique capable of overcoming the formidable resistances which, as we have seen, are interposed between the conscious and the unconscious levels of the mind. The positive results of recent research on the psychological influences of the family as regards matters less directly connected with sexuality are of a less unexpected kind, and seem to lie to some extent in the direct path of psychological progress even apart from the introduction of the methods of psycho-analysis. Nevertheless, it is the use of these methods that has given some precision to our knowledge in these respects also, and rendered more certain and definite what before was but vaguely suspected. At this point, therefore, it becomes necessary to review the principal results of psycho-analytic research with regard to these non-sexual aspects of mental development in relation to the family environment. [Sidenote: Controversies on this subject]