In psychology research literature, the term child prodigy is defined as a person under the age of ten who produces meaningful output in some domain to the level of an adult expert professional. [1] [2] [3]
Some children become famous and are called a prodigy although it is questionable whether they have produced meaningful output to the level of an adult expert professional. [39]
For the purposes of this and future research, a prodigy was defined as a child younger than 10 years of age who has reached the level of a highly trained professional in a demanding area of endeavor.
At the moment, the most widely accepted definition is a child, typically under the age of 10, who has mastered a challenging skill at the level of an adult professional.
His study of foreign languages began with French, which his father taught him in a novel way, fully described in the chapter on his education in the languages. So successful was this special method that within a year Karl was reading French with ease. Meanwhile he had begun the study of Italian, and from Italian passed to Latin. English came next, then the study of Greek, a language concerning which the boy's curiosity was whetted by tales from Homer and Xenophon told to him by his father... In all five languages the boy made such progress that by the time he was nine, according to his father's statement, he had read Homer, Plutarch, Virgil, Cicero, Ossian, Fénelon, Florian, and Metastasio, besides Schiller and other German writers.