6.4: Social Emotional Milestones

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As infants and toddlers interact with other people, their social and emotional skills develop. Here is a table of social and emotional milestones that they typically experience during the first two years.

Table \(\PageIndex{1}\): Social and Emotional Milestones (Developmental Milestones by the CDC is in the public domain)
Typical Age	What Most Children Do By This Age
2 months	Begins to smile at people Can briefly calm self (may bring hands to mouth and suck on hand) Tries to look at parent
4 months	Smiles spontaneously, especially at people Likes to play with people and might cry when playing stops Copies some movements and facial expressions, like smiling or frowning
6 months	Knows familiar faces and begins to know if someone is a stranger Likes to play with others, especially parents Responds to other people’s emotions and often seems happy Likes to look at self in a mirror
9 months	May be afraid of strangers May be clingy with familiar adults Has favorite toys
1 year	Is shy or nervous with strangers Cries when mom or dad leaves Has favorite things and people Shows fear in some situations Hands you a book when wants to hear a story Repeats sounds or actions to get attention Puts out arm or leg to help with dressing Plays games such as “peek-a-boo” and “pat-a-cake”
18 months	Likes to hand things to others as play May have temper tantrums May be afraid of strangers Shows affection to familiar people Plays simple pretend, such as feeding a doll May cling to caregivers in new situations Points to show others something interesting Explores alone but with parent close by
2 years	Copies others, especially adults and older children Gets excited when with other children Shows more and more independence Shows defiant behavior (doing what he has been told not to) Plays mainly beside other children, but is beginning to include other children, such as in chase games