The earliest idea of self seems to be obtained by the child through an examination by the senses of touch and sight of his own body. A child has been observed to study his fingers attentively in the fourth and fifth month, and this scrutiny goes on all through the second year and even into the third.[52] Children seem to be impressed quite early by the fact that in laying hold of a part of the body with the hand they get a different kind of experience from that which they obtain when they grasp a foreign object. Through these self-graspings, self-strikings, self-bitings, aided by the very varied, and often extremely disagreeable operations of the nurse and others on the surface of their bodies, they probably reach during the first year the idea that their body is different from all other things, is ‘me’ in the sense that it is the living seat of pain and pleasure. The growing power of movement of limb, especially when the crawling stage is reached, gives a special significance to the body as that which can be moved, and by the movements of which interesting and highly impressive changes in the environment, _e.g._, bangs and other noises, can be produced. ----- Footnote 52: For the facts see Preyer, _op. cit._, cap. xxii.; Tracy, _The Psychology of Childhood_, p. 47. ----- It is probable that the first ideas of the bodily self are ill-defined. It is evident that the head and face are not known at first as a _visible_ object. The upper limbs by their movement across the field of vision would come in for the special notice of the eye. We know that the baby is at an early date wont to watch its hands. The lower limbs, moreover, seem to receive special attention from the exploring and examining hand. There is some reason to think, however, that in spite of these advantages, the limbs form a less integral and essential part of the bodily self than the trunk. A child in his second year was observed to bite his own finger till he cried with pain. He could hardly have known it as a part of his sensitive body. Preyer tells us of a boy of nineteen months who when asked to give his foot seized it with both hands and tried to hand it over. A like facility in casting off from the self or alienating the limbs is illustrated in a story in the Worcester Collection of a child of three and a half years who on finding his feet stained by some new stockings observed: “Oh, mamma! these ain’t my feet, these ain’t the feet I had this morning”. This readiness to detach the limbs shows itself still more plainly in the boy C.’s complaining when in bed and trying to wriggle into a snug position that his legs came in the way of himself. Here the legs seem to be half transformed into foreign persons; and this tendency to personify the limbs seems to be further illustrated in Laura Bridgman’s pastime of spelling a word wrongly with one hand and then slapping that hand with the other.