• Watches faces intently, responds to other people’s expressions of emotion

• Does not pay attention to or frightened of new faces

• Smiles, imitates some facial expressions, follows moving object with eyes

• Does not smile, does not follow moving object with eyes

• Begins to babble, imitates sounds and words, brings hand to mouth

• Does not babble, laugh and has difficulty bringing objects to the mouth

• Has single words like “dada”, repeats sounds or gestures for attention

• Has no words

• Turns head toward direction of sound, responds to own name

• Does not turn head to locate sounds and appears not to respond to loud noises

• Pushes down on legs when feet placed on a firm surface; raises head and chest when lying on stomach

• Does not push down on legs when feet placed on a firm surface

• Smiles at mother or primary care-givers voice, prefers them over all others

• Does not show affection to primary care-giver, dislikes being cuddled

• Can sit up without assistance, can pull self up to stand, walks holding on to furniture

• Does not crawl, cannot stand when supported

• Waves ‘bye-bye’ and points to objects

• Does not use gestures such as waving or pointing

• Walks alone, with support can negotiate stairs and furniture, carries and pulls toys while walking

• Cannot walk by 18 months or walks only on his toes, cannot push a wheeled toy

• Has several single words by 15 to 18 months; uses simple phrases by 24 months

• Does not speak; does not imitate actions, cannot follow simple instructions

• Imitates behavior of others, excited about company of other children

• Does not appear to know the function of common household object such as a telephone by 15 months

• Uses 4-5 word sentences, understands most sentences and instructions

• Very limited speech, does not use short phrases, has difficulty in understanding simple instructions

• Imitates adults and playmates, expresses affection openly, separates easily from parents

• Has little interest in other children, has difficulty separating from mother or primary care-giver

• Sorts objects by shape and color

• Difficulty in manipulating small objects

• Plays make believe

• Has little interest in ‘make-believe’ play

• Climbs well, runs, kicks a ball, negotiates stairs unaided

• Frequently falls, has difficulty with stairs

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