The influence of experimentation is felt in the activity of intellect, feeling, and will alike. Of course all play, including the limited group which we have been considering, is of great importance to the whole mental make-up, since it acts in all directions, sharpening the intellect, exercising the will, and furnishing occasion for the discharge of emotion. But the special aim of the present discussion lies in the investigation of how far these powers of the mind are themselves the subjects of experimental play, and accordingly in what follows we shall not inquire as to the advantageous effect of play on attention, imagination, reason, etc., but will examine cases where these capacities are directly experimented with. A. EXPERIMENTATION WITH THE MENTAL POWERS If we ask ourselves what aspects of intellectual activity are most conspicuously subjects of playful experimentation we naturally turn to memory, imagination, attention, and reason. Our first subject for consideration, then, is memory, where again we must distinguish between simple recognition and reflective recollection. 1. _Memory_ (_a_) Recognition Recognition is the link which connects the present with what we have known in the past. The new psychology repudiates the common idea that the present impression is compared with a memory picture of the past and the two recognised as identical, since it is not borne out by the facts. Neither the emergence of a genuine memory picture nor its comparison with the present object is demonstrable. When I select my own from a number of hats I simply recognise it, and can tell no more about it. But a careful study of cases in which the recognition is hesitating clearly distinguishes the two following stages. First there is the simple knowledge: I have seen this before, the recognition having been accomplished by the “Coefficient of Recognition”[274] (Höffding) without our necessarily knowing why we recognise the object. It is difficult to say what grounds this feeling. Physiologically there may be special reasons for the accompanying nervous processes. Speaking psychologically, there seem to be certain shadowy feelings of warmth and intimacy. In any case the content of the memory picture is genuine, though it does not stand alone, but blends with the impression of the moment by the process of assimilation.[275] A second stage is reached through the fact that we are able to place the object suitably; we know that we have had something to do with it, and this is often facilitated by a hasty reversion to its earlier psychic _milieu_ of space and time relations, as well as of word and idea connections. When not too mechanical, as sometimes when dressing we put on everything in its right relation but without attention, recognition is pre-eminently pleasurable. Even the mere coefficient of recognition is accompanied with a mild satisfaction such as Faust experienced when after a foreign sojourn he found himself once more in his study.