Cele mai comune simptome printre persoanele cu tulburari din spectrul autist cuprind urmatoarele domenii de dezvoltare:

 Afectarea interactiunii sociale

• nu raspund cand sunt strigate
• evita contactul vizual
• pot sa evite sa imbratiseze sau sa fie imbratisati
• nu se angajeaza in joc imaginativ
• do not engage in social play
• do not express stranger anxiety
• do not express separation anxiety

 Probleme de comunicare 

• nu sustin conversatii
• au dificultati in exprimarea nevoilor si dorintelor
• nu reactioneaza ( pare surd) cateodata
• ecolalie imediata sau intarziata

 Obsessions

• have limited interests and activities 
• engage in repetitive movements
• have trouble reacting to changes in routines
• become overly focused on specific things 

 Simptome senzoriale

• have reduced sensitivity to pain
• are hypersensitive to sensory stimuli

 Simptome comportamentale

• throw tantrums
• exhibit aggressive or destructive behaviors
• have a short attention span
• have no apparent fear of dangerous situations