Psychologist William Stern first introduced the word IQ. It is developed from intelligenz-quotient, a German name. Alfred Binet and Theophile Simon presented the very first Intelligence Test in 1905. The IQ is usually determined by taking & multiplying the proportion of intellectual age to physical age by 100.
The term 'IQ' was coined in 1912 by the psychologist William Stern in relation to the German term Intelligenzquotient. At that time, IQ was represented as a ratio of mental age to chronological age x 100.
IQ testing
Terman promoted his test – the "Stanford-Binet" – as an aid for the classification of developmentally disabled children. Early on, Terman adopted William Stern's suggestion that mental age/chronological age times 100 be made the intelligence quotient or IQ.
A little later on, in the mid-1880s, academic James Cattell coined the term “mental test” to describe a number of assessments he felt measured “simple mental processes” linked to intelligence.
Alfred Binet (French: [binɛ]; 8 July 1857 – 18 October 1911), born Alfredo Binetti, was a French psychologist who invented the first practical IQ test, the Binet–Simon test.
Cattell (1890; as cited in DuBois, 1970) invented the term "mental test" in his famous paper entitled “Mental Tests and Measurements”, which described his research programming detailing ten mental tests he proposed for use with the general public.
The test is scored in terms of intelligence quotient, or IQ, a concept first suggested by German psychologist William Stern and adopted by Lewis Terman in the Stanford-Binet Scale. The IQ was originally computed as the ratio of a person's mental age to his chronological (physical) age, multiplied by 100.
He received his Ph. D. in psychology in 1905 before coming to Stanford University in 1910, where he stayed until his death in 1956. Terman is best known for developing the Stanford-Binet IQ test, a development which made both him and Stanford University well-known throughout the United States.
Documents that Changed the World: Alfred Binet's IQ test, 1905.
Marilyn vos Savant: 228
Born in 1946 in St. Louis, Missouri, Savant was listed as the person with the highest IQ by Guinness World Records.
His performance beats those of physicists Stephen Hawking and Albert Einstein, who were both estimated to have IQs around 160.
The appropriately named Marilyn vos Savant is in a class of her own. According to Guinness World Records, her astonishing IQ of 228 is the highest ever recorded. The daughter of an Italian and a German immigrant, vos Savant was born in St. Louis, Missouri, in 1946.
Most people have an average IQ between 85 and 115. Overall, about 98% of people have a score below 130. Only 2% of the population score above that and are considered above average. But your IQ score isn't simply about bragging rights.
The immediate problem is that no one knows what Einstein's IQ was, as he was never tested. It is assumed he would have an IQ score of 160+, which is reckoned to equate with genius level.
1 But it wasn't until psychologist Alfred Binet was asked to identify which students needed educational assistance that the first intelligence quotient (IQ) test was born. Although it has its limitations, Binet's IQ test is well-known around the world as a way to assess and compare intelligence.
In 1898, the smartest man who ever lived was born in America. His name was William James Sidis and his IQ was eventually estimated to be between 250 and 300 (with 100 being the norm). His parents, Boris and Sarah, were pretty intelligent themselves.
Lewis Terman, in full Lewis Madison Terman, (born January 15, 1877, Johnson county, Indiana, U.S.—died December 21, 1956, Palo Alto, California), American psychologist who published the individual intelligence test widely used in the United States, the Stanford-Binet test.
Does an individual's IQ change with age? An individual's IQ does not change with age. In other words: if you did an IQ test now and then another one in 10 years' time, your IQ score will probably be very similar. This is because IQ is always measured relative to other people your age.
IQ, short for intelligence quotient, is a measure of a person's reasoning ability. In short, it is supposed to gauge how well someone can use information and logic to answer questions or make predictions. IQ tests begin to assess this by measuring short- and long-term memory.
The Important Answer About IQ
No. To make it clear right now, IQ is not a valid word in Scrabble. This is according to the official Scrabble dictionary, even though IQ is a legitimate word in the dictionary. That's because, generally speaking, you cannot use abbreviations in Scrabble.
While diagnoses were recognized as far back as the Greeks, it was not until 1883 that German psychiatrist Emil Kräpelin (1856–1926) published a comprehensive system of psychological disorders that centered around a pattern of symptoms (i.e., syndrome) suggestive of an underlying physiological cause.
Prehistoric cultures often held a supernatural view of abnormal behavior and saw it as the work of evil spirits, demons, gods, or witches who took control of the person. This form of demonic possession was believed to occur when the person engaged in behavior contrary to the religious teachings of the time.
The earliest known record of mental illness in ancient China dates back to 1100 B.C. Mental disorders were treated mainly under Traditional Chinese Medicine using herbs, acupuncture or "emotional therapy".