Fine Motor/Adaptive | Mean | |
Unfisted | 3 months | 0 to 4 months |
Bats at objects | 3 months | 2 to 5 months |
Objects to midline | 4 months | 3 to 6 months |
Transfers objects | 5 months | 4 to 7 months |
Raking grasp | 7 months | 5 to 10 months |
Finger feeds | 7 months | 5 to 10 months |
Primitive pincer | 8 months | 6 to 10 months |
Neat pincer | 9 months | 7 to 10 months |
Voluntary release | 12 months | 10 to 15 months |
Helps with dressing | 12 months | 10 to 16 months |
Spoon feeds | 15 months | 12 to 18 months |
Uses cup open/sippy | 15 months | 10 to 18 months |
Imitates housework | 18 months | 14 to 24 months |
Handedness | 24 months | 18 to 30 months |
Helps with undressing | 24 months | 22 to 30 months |
Undresses self | 36 months | 30 to 40 months |
Toilet training | 24 to 36 months |
Language | Mean | |
Cooing | 3 months | 1 to 4 months |
Laugh | 4 months | 3 to 6 months |
Turns to voice | 4 months | 3 to 6 months |
Razzing | 5 months | 4 to 8 months |
Babbling | 6 months | 5 to 9 months |
Dada/mama non-specifically | 8 months | 6 to 10 months |
Gesture games | 9 months | 7 to 12 months |
Understands no, | 10 months | 9 to 18 months |
Mama/dada specifically | 10 months | 9 to 14 month |
One step command with a gesture | 12 months | 10 to 16 months |
Immature jargoning | 13 months | 10 to 18 months |
One step command w/out a gesture | 15 months | 12 to 20 months |
Points to body parts | 18 months | 12 to 24 months |
Mature jargoning | 18 months | 16 to 24 months |
Puts two words together | 24 months | 20 to 30 months |
Pronouns inappropriately | 24 months | 22 to 30 months |
Two step command | 24 months | 22 to 30 months |
States first name | 34 months | 30 to 40 months |
Pronouns appropriately | 36 months | 30 to 42 months |
Social/Emotional | Mean | |
Social smile | 5-6 weeks | 1 to 3 months |
Object permanence | 9 months | 6 to 12 months |
Stranger anxiety | 9 months | 6 to 12 months |
Affective sharing | 10 months | 9 to 18 months |
Uses mother as secure base | 12 months | 9 to 18 months |
Separation distress | 12 months | 9 to 24 months |
18 months | 12 to 36 months | |
Parallel play | 24 months | 12 to 30 months |
Associative play | 30 months | 24 to 48 months |
Cooperative play | 36 months | 24 to 48 months |
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