mental age

He wanted to know exactly what had happened, but could not ask Aaron, who is non-verbal and whom he describes as having the mental age of a two-year-old.

It’s not cute watching and adult man regress to the mental age of a three-year-old.

Sheila's last recorded child assessment the following April judged her to be functioning at the mental age of a child of 18 months.

A third defendant, who was 15 at the time but with the mental age of a 10-year old, was sentenced for affray and for encouraging or assisting grievous bodily harm with intent.

He has the mental age of a baby of around six months old.