7. Failure to react to a parent’s voice of presence
Before going any further, it is important to understand that reacting to a parent’s voice and the presence of a parent are two different things. The presence of a parent can always be felt by a child, deaf or not. It’s one of those bonds that come with birth. Children with autism don’t turn their heads, smile or even mutter something in return to what their parents say.
8. Accelerated growth of the head circumference in relation to the starting point
In some cases, children with attachment and developmental problems are born with small head circumferences, which tend to grow rapidly within the first two years of their lives. This often results in head circumferences larger than normal at their age.