Rolling over, sitting up, crawling, or walking late
Talking late or having trouble with talking
Slow to master things like potty training, dressing, and feeding themselves
Difficulty remembering things
Inability to connect actions with consequences
Behavior problems such as explosive tantrums
Difficulty with problem-solving or logical thinking
In children with severe or profound intellectual disability, there may be other health problems as well. These problems may include seizures, mood disorders (anxiety, autism, etc.), motor skills impairment, vision problems, or hearing problems.