... and he is seen in four different segments, ranging from the age of 6 1/2 months to 121/2 months. Alex is held by his father and they are seated in front of a desk; keys are used as an object of interest for the child. Alex is 61/2 months in the first segment and it is obvious that he has moved on from the second sub-stage and he is now aware of objects in his immediate environment. Alex reaches for the keys and touches them first with his fingers and then grasps them in his palm. This action seems to be very imprecise and it is obvious that his sensori-motor functions are, as yet undeveloped. He rattles the keys with obvious interest, seen in the repetition of this action. A cloth is introduced and Alex is only able to retrieve the keys when they are still partially visible under the ...

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