Social Communication and Interaction:

Difficulty with social interaction: May struggle to initiate or maintain conversations, understand social cues, or share interests with others.

Reduced eye contact and facial expressions: May avoid eye contact or have difficulty expressing emotions through facial expressions.

Challenges with nonverbal communication: May struggle to understand or use nonverbal cues like gestures or body language.

Delayed or unusual language development: May have delays in language acquisition, use repetitive speech, or have difficulty understanding spoken language.

Restricted and Repetitive Behaviors, Interests, or Activities:

Repetitive movements or actions: May engage in repetitive movements like hand flapping, rocking, or spinning.

Insistence on sameness and routines: May become distressed by changes in routines or environment.

Intense focused interests: May have intense interests in specific topics or objects, and may struggle to shift focus to other things.

Sensory sensitivities: May be overly sensitive or under-sensitive to sensory input like sounds, lights, or textures.

Other Characteristics:
Delayed cognitive or learning skills: May experience delays in cognitive or learning skills, but this is not always the case.
Unusual eating and sleeping habits: May have unusual eating or sleeping patterns.

Gastrointestinal issues: May experience gastrointestinal issues.

Hyperactivity, impulsivity, or inattentiveness: May exhibit hyperactive, impulsive, or inattentive behaviors.
Anxiety, stress, or excessive worry: May experience anxiety, stress, or excessive worry.
Lack of fear or excessive fear: May have an atypical reaction to fear, either a lack of fear or an excessive amount.
Difficulty with coordination: May experience difficulty with coordination or fine motor skills.