MOVEMENT
- Walks alone (12-16 mos.)
- Pulls toys behind him while walking (13-16 mos.)
- Carries large toy or several toys while walking (12-15 mos.)
- Begins to run stiffly (16-18 mos.)
- Walks into ball (18-24 mos.)
- Climbs onto and down from furniture unsupported (16-24 mos.)
- Walks up and down stairs holding on to support (18-24 mos.)
HAND AND FINGER SKILLS
- Scribbles spontaneously (14-16 mos.)
- Turns over container to pour out contents (12-18 mos.)
- Builds tower of four blocks or more (20-24 mos.)
LANGUAGE
- Points to object or picture when it’s named for them (18-24 mos.)
- Recognizes names of familiar people, objects, and body parts (18-24 mos.)
- Says several single words (15-18 mos.)
- Uses two-word sentences (18-24 mos.)
- Follows simple, one-step instructions (14-18 mos.)
- Repeats words overheard in conversations (16-18 mos.)
COGNITIVE
- Finds objects even when hidden under 2 or 3 covers
- Begins to sort shapes and colors (20-24 mos.)
- Begins make-believe play (20-24 mos.)
SOCIAL
- Imitates behavior of others, especially adults and older children (18-24 mos.)
- Increasingly enthusiastic about company or other children (20-24 mos.)
- Demonstrates increasing independence (18-24 mos.)
- Begins to show defiant behavior (18-24 mos.)
- Episodes of separation anxiety increase toward midyear, then fade
DEVELOPMENTAL RED FLAGS (12 TO 24 MONTHS)
- Cannot walk by 18 months
- Fails to develop a mature heel-toe walking pattern after several months of walking, or walks exclusively on toes
- Does not speak at least 15 words by 18 months
- Does not use two-word sentences by age 2
- By 15 months does not seem to know the function of common household objects (brush, telephone, bell, fork, spoon)
- Does not imitate actions or words by 24 mos.
- Does not follow simple one-step instructions by 24 mos.
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