Months 9-10

Perceives caregivers as separate from self, demonstrates by looking back at adult when separated^{14, 41}

Performs for home audience, repeats when others laugh, applaud^{14, 41}

May start to protect self and possessions^{14, 41}

Sensitive and responsive to other children (may cry when they cry) ^{14, 41}

Demonstrates mood and shows preferences¹⁴

Imitates gestures, facial expressions and sounds of others^{14, 41}

Begins to identify with others of same sex¹⁴

Begins growing awareness of self, approval and disapproval ⁴¹

Expresses fear of strange people and places⁴¹

High intensity excitement in social game⁴¹

Looks to adult to see if in trouble, wants approval⁴¹

Beginning to respond to tone of voice but may not stop actions with “no” ⁴¹

May test response by doing undesired action⁴¹

Understands that own emotions arise from actions⁴¹

Initiates intentional interactions⁴¹

Responds differently to different people⁴¹

Surprise and shyness emerge⁴¹

Can delay response⁴¹

Takes pleasure in mastery⁴¹

Differentiates others by voices, gender and age⁴¹

Separation anxiety⁴¹

Joint referencing (understands gaze toward something) ⁴¹

Social referencing (looks for emotions of others before acting)^{41, 14}