To understand what the score on an IQ test means, there are a few key terms that you should know: 1  Bell Curve: When IQ scores are plotted on a graph, they typically follow a bell-shaped curve. The peak of the bell occurs where the majority of the scores lie. 2  Mean: The average score.
Key difference: Disability is an injury that restricts the functions or movements of a person. Disorder is an illness that causes disruption to the functions of a person. Disability is the consequence of an impairment caused to a person. It is essentially a medical condition, which doesn't allow a person to function in a normal manner.
â¢ Categorized under Disease,Health | Difference Between Mental Illness and Mental Disorder. Mental Illness vs Mental Disorder. One of the most dreadful illnesses an individual could possess may be found in the mind which is directly dependent on the brain. A personâs collective health condition does not solely rely on his physical, emotional, and spiritual health but also on his mental health.