Social and Emotional

• 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 

Language/Communication

• Responds to sounds by making sounds 
• Strings vowels together when babbling (“ah,” “eh,” “oh”) and likes taking turns with parent while making sounds 
• Responds to own name 
• Makes sounds to show joy and displeasure 
• Begins to say consonant sounds (jabbering with “m,” “b”) 

Cognitive (learning, thinking, problem-solving)

• Looks around at things nearby 
• Brings things to mouth 
• Shows curiosity about things and tries to get things that are out of reach 
• Begins to pass things from one hand to the other 

Movement/Physical Development

• Rolls over in both directions (front to back, back to front) 
• Begins to sit without support 
• When standing, supports weight on legs and might bounce 
• Rocks back and forth, sometimes crawling backward before moving forward 

• Doesn’t try to get things that are in reach
• Shows no affection for caregivers
• Doesn’t respond to sounds around him
• Has difficulty getting things to mouth
• Doesn’t make vowel sounds (“ah”, “eh”, “oh”)
• Doesn’t roll over in either direction
• Doesn’t laugh or make squealing sounds
• Seems very stiff, with tight muscles
• Seems very floppy, like a rag doll