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
Causes for Concern	Doesn’t watch things as they move Doesn’t smile at people Can’t hold head steady Doesn’t coo or make sounds Doesn’t bring things to mouth Doesn’t push down with legs when feet are placed on a hard surface Has trouble moving one or both eyes in all directions