Physiological point of this psychological process is the formation of temporary ties, reflecting a certain ratio of certain basic conditioned stimuli, forming a common part of all the individual relationships with other similar properties. Just another began to emerge at the level of development of the brain of anthropoids process of psychological analysis and synthesis dramatically sets them apart from all lower in the phylogenetic series of animals, above all, a highly developed subject activity. Anthropoids have able to meet their needs to use, such properties of various objects as the property is extended limb, thus combining into one class of this property, objects such as stick, rope, wire. The birth of this process highlights of anthropoids is also the birth of their gun business, ie nucleation ability to attach objects are needed to meet the specific needs of property. For example, breaking the stick from the bush, breaking of her lateral branches, pointed sticks bait, etc.
All this is evidence that the brain of anthropoids is capable of forming a mental image according to which the anthropoid is processing facility, and this image is nothing else but a generalized image of anthropoid relationships with property inherent to a certain number of facilities, property, using that anthropoid meets their needs. However, at the level of development of the brain of anthropoids ability to form generalized images only still in its infancy. Fully developed this ability to reach the level of development brain of one species of fossil man. In the phylogeny of the nervous system of fossil man, eventually emerging brain's ability to form concepts, an ability that reaches its full development at level of development of the human brain of the modern species.