A "non-spectrum disorder" means a disorder that is not part of the spectrum being discussed. For example, it could refer to the disorders that are not part of the autism spectrum or disorders that are not part of the schizophrenia spectrum. (I have seen the term used in both these situations, so it depends on the context.) Non-spectrum disorders could refer to attention disorders, anxiety disorders, obsessive-compulsive disorder, and other developmental disorders.
1 in 100 of the population have autistic spectrum disorder. 0.2% are female, and 1.8% are male.
I have not seen any studies on whether twins are more likely to have an autism spectrum disorder than single-birth children. It is possible that no one has done research on this. If one identical twin has an autism spectrum disorder, there is approximately a 90% chance that the other identical twin will. They might not have the same autism spectrum disorder or they might have the same disorder at different levels of severity. Many studies show the chance that they both have it if one twin does as somewhere between 82% and 97%. If the twins are fraternal (non-identical) twins and one has an autism spectrum disorder, the other has about the same chance of having an autism spectrum disorder as non-twin siblings do, which is greater than the chance of having an autism spectrum disorder in a family that does not have any history of it.
Non-verbal learning disability/disorder is not technically on the autism spectrum list, however some theorize that it is a form of autism. Some also speculate that NVLD (or NLD) and Asperger Syndrome are not only closely related but may be the same disorder.
The visible light spectrum ranges from red to violet.
Fetal Alcohol Spectrum Disorder
Yes, a child can be diagnosed both with Autism Spectrum Disorder and a learning disability too. In fact Attention Deficit Hyperactivity Disorder is considered a 'cousin' to Autism Spectrum Disorder and is often comorbid with Autism.
No. The descriptions of the autism spectrum disorders are such that you cannot have more than one. However, with more information, the diagnosis might change from one autism spectrum disorder to another. A person with an autism spectrum disorder can have other conditions or disorders, such as ADHD, epilepsy, or bipolar disorder.
A spectrum disorder is a condition where symptoms can vary widely among individuals, leading to a range of severity and types of behaviors. These disorders typically share common characteristics but can present differently in each person. Examples include autism spectrum disorder and attention deficit hyperactivity disorder (ADHD).
Obsessive-compulsive disorder (OCD) is not a symptom of autism spectrum disorders. However, people with autism spectrum disorders can exhibit behaviors that appear similar to OCD, without having OCD. Also, people with an autism spectrum disorder can have OCD as a comorbid condition.
Autism Spectrum Disorder is a neurological condition, autistic people are born autistic - we do not know why people are autistic.
Symptoms of Autism Spectrum Disorder (ASD) typically begin to manifest in children around the age of 2 or 3 years old.
Autism is considered to be a disorder - thus why it's called Autism Spectrum Disorder. Autism is certainly not a personality, all Autistic people have vastly different personalities.