Social reaction to the adult

Two to three months

Babies can distinguish humans from inanimate objects and the baby knows that the men that meet their needs. Babies are satisfied when being with people and was not happy when left alone. At this age infants did not show a sense more like one particular person compared with others.

4 to 5 months

Babies like to be picked up by anyone who approached him. He gave a different reaction to the smiling faces, friendly voices and noises that indicate anger.

6 to 7 months

Infants distinguish between "friends" and "foreigners" with a smile on the first and showed fear of the presence in the latter. This is the beginning of the "past", is also the beginning of "time bound" is the period in which the baby shows a strong attachment to his mother or mother substitute and reduced hospitality.

8 to 9 months

Baby trying to mimic the words, gesture and simple movements of others.

12 months

Babies react to the ban "lest".

16 to 18 months

Negativism, in the form of stubbornly unwilling to follow requests or orders from adults indicated by withdrawing behavior or explosive anger.

22 to 24 months

Baby cooperate in a number of routine activities such as dressing, eating, and bathing.