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. 2019 Dec 2;144(6):e20190374. doi: 10.1542/peds.2019-0374

TABLE 3.

CDC Guidelines for Most Children and SWYC Normative Data

CDC Recommendation Parents’ Report
Most Children By Age, mo SWYC Milestones Question Very Much, % Somewhat or Very Much, %
Cognitive and communication milestones
 Babbles with expression and copies sounds he or she hears 4 Copies sounds that you make 6 51
 Copies sounds and gestures of others 9 Copies sounds that you make 44 93
 Responds to own name 6 Looks when you call his or her name 63 97
 Plays “peek-a-boo” 9 Plays games like “peek-a-boo” or “pat-a-cake” 49 90
 Plays games such as “peek-a-boo” and “pat-a-cake” 12 Plays games like “peek-a-boo” or “pat-a-cake” 80 98
 Says “mama” and “dada” and exclamations such as “uh-oh!” 12 Calls you “mama” or “dada” or similar name 66 91
 Follows simple directions such as “pick up the toy” 12 Follows directions such as “Come here” or “Give me the ball” 41 94
 Follows simple instructions 24 Follows directions such as “Come here” or “Give me the ball” >99 >99
 Says several single words 18 Names at least 5 familiar objects- such as a ball or milk 82 97
 Says sentences with 2–4 words 24 Puts ≥2 words together such as “more water” or “go outside” 93 >99
 Talks well enough for strangers to understand most of the time 36 Talks so other people can understand him or her most of the time 90 >99
 Starts to understand time 48 Uses words such as “yesterday” and “tomorrow” correctly 79 98
 Tells stories 48 Tells you a story from a book or television 98 >99
 Plays board or card games 48 Follows simple rules when playing a board game or card game 73 98
Motor milestones
 May be able to roll over from tummy to back 4 Rolls over 27 78
 Begins to pass things from 1 hand to the other 6 Passes a toy from 1 hand to the other 75 97
 Can get into sitting position 9 Gets to a sitting position by himself or herself 78 94
 Pulls to stand 9 Holds 2 objects and bangs them together 59 84
 Bangs 2 things together 12 Holds 2 objects and bangs them together 98 >99
 Walks alone 18 Walks across a room without help >99 >99
 May walk up steps and run 18 Runs 85 97
 Begins to run 24 Runs >99 >99
 May walk up steps and run 18 Walks up the stairs with help 82 96
 Walks up and down the stairs holding onto the railing 24 Walks up the stairs with help 98 >99
 Kicks a ball 24 Kicks a ball 89 >99
 Makes or copies straight lines or circles 24 Draws lines 58 92
 Climbs well 36 Climbs up a ladder at a playground 96 >99
 Copies a circle with pencil or crayon 36 Draws simple shapes such as a circle or a square 48 94