Social and Emotional Development, 0 – 5 years
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Social and emotional milestones are often harder to pinpoint than signs of physical development. This area emphasizes many skills that increase self-awareness and self-regulation. Research shows that social skills and emotional development (reflected in the ability to pay attention, make transitions from one activity to another, and cooperate with others) are a very important part of school readiness.Â
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 From birth to 3 months, babies spend a lot of time getting to know their own bodies. They:
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• Suck their own fingers
• Observe their own hands
• Look at the place on the body that is being touched
• Begin to realize she is a separate person from others and learn how body parts, like arms and legs, are attached
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Infants are interested in other people and learn to recognize primary caregivers. Most infants:
•  Can be comforted by a familiar adult
• Respond positively to touch
• Interact best when in an alert state or in an inactive and attentive state
• Benefit from short, frequent interactions more than long, infrequent ones
• Smile and show pleasure in response to social stimulation
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From 3 to 6 months, babies are more likely to initiate social interaction. They begin to:
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• Play peek-a-boo
• Pay attention to own name
• Smile spontaneously
• Laugh aloud
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From 6 to 9 months, babies show a wider emotional range and stronger preferences for familiar people. Most can:
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• Express several clearly differentiated emotions
• Distinguish friends from strangers
• Respond actively to language and gestures
• Show displeasure at the loss of a toy
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From 9 to 12 months, as they near age one, imitation and self-regulation gain importance. Most babies can:
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• Feed themselves finger foods
• Hold a cup with two hands and drink with assistance
• Hold out arms and legs while being dressed
• Mimic simple actions
• Show anxiety when separated from primary caregiver
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From 1 to 2 years, children become more aware of themselves and their ability to make things happen. They express a wider range of emotions and are more likely to initiate interaction with other people. At this stage, most children:
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• Recognize themselves in pictures or the mirror and smile or make faces at themselves
• Show intense feelings for parents and show affection for other familiar people
• Play by themselves and initiate their own play
• Express negative feelings
• Show pride and pleasure at new accomplishments
• Imitate adult behaviors in play
• Show a strong sense of self through assertiveness, directing others
• Begin to be helpful, such as by helping to put things away
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From 2 to 3 years, children begin to experience themselves as more powerful, creative “doers.” They explore everything, show a stronger sense of self and expand their range of self-help skills. Self-regulation is a big challenge. Two-year-olds are likely to:
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• Show awareness of gender identity
• Indicate toileting needs
• Help to dress and undress themselves
• Be assertive about their preferences and say no to adult requests
• Begin self-evaluation and develop notions of themselves as good, bad, attractive, etc.
•  Show awareness of their own feelings and those of others, and talk about feelings
• Experience rapid mood shifts and show increased fearfulness (for example, fear of the dark, or certain objects)
• Display aggressive feelings and behaviors
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Children enjoy parallel play, engaging in solitary activities near other children. They are likely to:
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• Watch other children and briefly join in play
• Defend their possessions
• Begin to play house
• Use objects symbolically in play
• Participate in simple group activities, such as singing clapping or dancing
• Know gender identity
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At 3 to 4 years, as their dexterity and self-help skills improve, 3-year-olds become more independent. Most can:
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• Follow a series of simple directions
• Complete simple tasks with food without assistance, such as spreading soft butter with a dull knife and pouring from a small pitcher
• Wash hands unassisted and blow nose when reminded
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Children become more interested in other children. They are now more likely to:
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• Share toys, taking turns with assistance
• Initiate or join in play with other children and make up games
• Begin dramatic play, acting out whole scenes (such as traveling, pretending to be animals)
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At 4 to 5 years, children are more aware of themselves as individuals. They:
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• Show some understanding of moral reasoning (exploring ideas about fairness and good or bad behavior)
• Compare themselves with others
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4-year-olds are very interested in relationships with other children. They:
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• Develop friendships
• Express more awareness of other people’s feelings
• Show interest in exploring sex differences
• Enjoy imaginative play with other children, like dress up or house
• Bring dramatic play closer to reality by paying attention to detail, time, and space