I hope this helps, DeepThought, to cut down the broad use of the term on WP:
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What is savant syndrome?
Savant Syndrome is a rare, but spectacular, condition in which persons with various developmental disorders, including autistic disorder, have astonishing islands of ability, brilliance or talent that stand in stark, markedly incongruous contrast to overall limitations. The condition can be congenital (genetic or inborn), or can be acquired later in childhood, or even in adults.
The savant skills co-exist with, or are superimposed upon, various developmental disabilities including autistic disorder, or other conditions such as mental retardation or brain injury or disease that occurs before (pre-natal) during (peri-natal) or after birth (post-natal), or even later in childhood or adult life. The extraordinary skills are always linked with prodigious memory of a special type — exceedingly deep but very, very narrow.
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How common is savant syndrome?
Approximately one in ten (10%) of persons with autistic disorder have some savant skills. In other forms of development disability, mental retardation or brain injury, savant skills occur in less than 1% of such persons (approximately 1:2000 in persons with mental retardation).
Since these other forms of mental disability are much more common than autistic disorder however, it turns out that approximately 50% of persons with savant syndrome have autistic disorder, and the other 50% have some other form of developmental disability, mental retardation or brain injury or disease. Thus not all savants are autistic, and not all autistic persons are savants.
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What is the range of savant skills?
Savant skills exist over a spectrum of abilities. The most common savant abilities are called splinter skills. These include behaviors such as obsessive preoccupation with, and memorization of, music and sports trivia, license plate numbers, maps, historical facts, or obscure items such as vacuum cleaner motor sounds, for example. Talented savants are those persons in whom musical, artistic, mathematical or other special skills are more prominent and highly honed, usually within an area of single expertise, and are very conspicuous when viewed against their overall handicap.
The term prodigious savant is reserved for those very rare persons in this already uncommon condition where the special skill or ability is so outstanding that it would be spectacular even if it were to occur in a non-handicapped person. There are probably fewer than 50 prodigious savants living worldwide at the present time who would meet this high threshold of special skill.
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What are the typical savant skills?
Particularly striking is the consistent observation also over this past century that savant skills typically, and curiously, are generally confined to only about five general areas of expertise — music, art, lightning calculating or other mathematical skills, calendar calculating and mechanical/spatial skills.
This very limited, but spectacular, array of special skills is noteworthy considering the much wider palette of skills in the human repertoire, and the rarity of the obscure skill of calendar calculating in the general population, which seems an ability almost universal, innately so, among savants.
Music is the generally the most common savant skill-usually playing piano by ear and almost always with perfect pitch. Other percussion instruments such as marimba or drums can be mastered as well, but much less frequently. Musical performance abilities predominate, but outstanding composing skills have been documented as well, most often linked to performance ability, but not necessarily so. The triad of mental disability, blindness and musical genius occurs with a curious, conspicuous frequency in reports over this past century, particularly when one considers the relative rarity of each of those circumstances individually.
Artistic talent, usually painting or drawing, is seen next most frequently. Other forms of artistic talent can occur as well, such as sculpting. Lightning calculating or other mathematical skills, such as the ability to compute multi-digit prime numbers contrasted with the inability to perform even simple arithmetic, has often been reported. Mechanical ability, constructing or repairing intricate machines or motors for example, or spatial skills such as intricate map and route memorizing, or being able to compute distances with precise accuracy just from visualization, do occur, but are seen somewhat less frequently.
Calendar calculating is curiously and conspicuously common among savants, particularly considering the rarity of that obscure skill in the general population. Beyond being able to name the day of the week that a date will occur on in any particular year, calendar calculating includes being able to name all the years in the next 100 in which Easter will fall on March 23rd, for example, or all the years in the next 20 when July 4 will fall on a Tuesday. The so-called 'calculating twins' reported extensively in the literature, have a calendar calculating span of over 40000 years backward or forward in time. They also remember the weather for every day of their adult life.
Other skills are occasionally seen including multilingual acquisition ability or other unusual language (polyglot) skills, exquisite sensory discrimination in smell or touch, perfect appreciation of passing time without access to a clock face, or outstanding knowledge in specific fields such as neurophysiology, statistics, history or navigation, to name a few. While always controversial, there have been some reports of extra-sensory perception skills occurring in savants as well.
Typically a particular one of these skills occurs singly in each person with savant syndrome. However in some instances multiple skills occur in the same person. Regardless of the type of skill, it is always combined with prodigious memory, and it is this special kind of memory-extraordinarily deep but very, very narrow — that cuts across all the various special skills and welds the condition of savant syndrome together.
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What is the relationship of savant syndrome to IQ?
When Dr. Down originally named the condition idiot savant, he linked its name with a classification of IQ of less than 25, but almost all reported cases have occurred in persons with an IQ above 40. However a low measured IQ score, or 'mental retardation' either as a symptom or separate disorder, is not what determines whether a person is or is not a savant. Instead the term savant syndrome encompasses a number of different mental disabilities including, but not limited to, the separate disorder of mental retardation itself. When applied to savant syndrome, the term 'mental disability' can include disorders as Autism, Asperger's, Hyperlexia or Williams Syndrome, for example.
In some of these persons measured IQ can be normal or even superior, although when that is the case, usually the IQ sub-scores show a wide scatter among the various sub-tests that make up the overall IQ test battery with some sub-tests showing severe limitations and other showing extremely high scores. Thus a low IQ score, while often present in savant syndrome, is not necessarily the case in all instances, and it is not a finding essential or requisite to savant syndrome. Some savants do score in the normal or superior range on commonly used IQ tests, or at least on some of the sub-tests that make up the overall IQ test battery.
IQ is a measure of so-called 'general intelligence'. While some scatter is common in most persons on the sub-tests of the IQ test battery, sub-test scores do tend to cluster in certain ranges for a given individual producing, when averaged, an overall 'general' intelligence score, or IQ. That IQ score does tend to be correlated with a general level of overall intellectual functioning. But the very wide scatter of abilities seen in some savants on the IQ sub-scores, which is much more pronounced than in most persons, has raised the question of whether it would be more accurate to view all persons as a series of multiple intelligences, rather than having what has been designated general intelligence, or IQ.
Indeed some investigators view savants as refuting the notion of 'general intelligence' and argue, instead, that each of us have multiple intelligences and testing & measurement of "IQ" in all persons should be revised to reflect that reality.
Further, in viewing 'mental retardation' one needs to differentiate between 'actual' retardation (measured IQ below 70) and 'functional' retardation. The latter can occur in someone with seemingly normal or even superior intellectual capacity whose mental disability, from whatever etiology, causes them to function at a much lower level over all than one might expect from estimated or even measured IQ.
It is not uncommon to see some autistic persons, for example, function at a superior level in some areas such as mathematics, verbal skills or memory, but be so severely disabled in other areas so as to 'function' at much lower level overall. The present IQ sub-tests, such as digit span, for example, are not sufficiently tailored to realistically assess certain areas of superior function in savants, and do need to be revised and tailored accordingly to be able to get a true measure of savant capabilities for comparative studies in the area of 'intelligence'.
In summary, measured IQ levels in savant syndrome most often are below 70. However while savant syndrome can occur in persons where Mental Retardation is the basic CNS disorder, savant syndrome can also be seen in persons with IO's below 70 as a finding or symptom where the basic developmental disorder is instead Autism, Asperger's, Hyperlexia, PDD or Williams Syndrome, for example, or a number of other conditions following CNS injury or disease.
While it is true that in most persons with savant syndrome measured IQ is below 70, savant syndrome includes a number of mental disorders in which IQ function, in scattered areas of functioning at least, can be normal or even superior. In short, savant syndrome is not synonymous with, nor limited to mental retardation, and in some persons with savant syndrome IQ can be in the normal, or even superior range.
http://www.autisticsociety.org/autism-article163.html
DeepThought, add whatever else isn't listed or correct anything which isn't right to your knowledge.
07 Aug 2005, 12:24 am
I don't know quite how I do it. Sure, I study it and have progressively gotten better, too. However, I hear metrical musics to poetry which I find pleasant and try to match and thus my work flows.
