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.
While trauma is associated with both disorders, Welton explains that the traditional difference is that with schizophrenia, the trauma tends to follow the disease. It is a consequence of the illness; it is not causative. Schizophrenia is classified as a psychotic disorder and managed primarily through drugs, whereas DID is considered a developmental disorder that is more responsive to psychotherapy and behavioral modifications. On the surface, the difference between the two disorders seems clear cut.