Final answer:
The main areas for diagnosing autism before age 3 include language in social communication, symbolic or imaginative play, and social interaction. Gross motor development and growth below the 5th percentile are not diagnostic criteria for autism.
Step-by-step explanation:
The diagnostic criteria for autism, or more specifically Autism Spectrum Disorder (ASD), include delayed or abnormal functioning in several areas with onset before age 3 years. The correct areas of concern, according to the diagnostic criteria, are Language as used in social communication Symbolic or imaginative play Social interaction Although gross motor development and growth below the 5th percentile for height and weight are significant developmental concerns, they are not typically considered diagnostic criteria for autism. Children with autism may have difficulty with social communication, such as making and maintaining eye contact, reading social cues, or engaging in back-and-forth conversation. Problems in symbolic or imaginative play are also common, as autistic children may not engage in creative play like their peers, and they may have difficulty understanding others' perspectives. Moreover, social interactions can be particularly challenging for those with ASD, as they might struggle to make connections, form friendships, or intuitively understand social norms.In conclusion, when considering autism before age 3, the main areas to be evaluated are language used in social communication, symbolic or imaginative play, and social interaction.