1 23 General introduction Box 1.3. Red flags or signs of ASD (Dietz, 2007) · No babbling by 12 months · No interest in other people by 12 months · No smiling at others by 12 months · No reaction when spoken to by 12 months · No gesturing by 12 months (pointing, waving bye bye) · No functional use of single words by 18 months · No 2-word spontaneous phrases (not echoic) by 24 months · Any loss of any language or social skills at any age
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