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imitation
imitation The acquisition of patterns of behaviour by repeating similar behaviour observed in others, not necessarily of the same species....
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language acquisition
language acquisition the process of learning a native or a second language. The acquisition of native languages is studied primarily by developmental psychologists and psycholinguists. Although how children learn to speak is not perfectly understood, most explanations involve both the observation t...
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James Knox Polk
James Knox Polk , 1795-1849, 11th President of the United States (1845-49), b. Mecklenburg co., N.C.
Early Career
His family moved (1806) to the Duck River valley in Tennessee and there, after graduating from the Univ. of North Carolina (1818) and studying law under Felix Grundy, he began ...
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Louisiana Purchase
Louisiana Purchase 1803, American acquisition from France of the formerly Spanish region of Louisiana.
Reasons for the Purchase
The revelation in 1801 of the secret agreement of 1800, whereby Spain retroceded Louisiana to France, aroused uneasiness in the United States both because Napole...
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Warren Edward Buffett
Warren Edward Buffett , 1930-, American financial executive, b. Omaha, Nebr., studied at Wharton School of Finance (1947-49), grad. Univ. of Nebraska (B.S., 1950), Columbia Univ. (M.S., 1951). After working as an investment salesman and securities analyst, he was partner (1956-69) in the investment ...
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Joseph Duveen, 1st Baron Duveen of Millbank
Joseph Duveen, 1st Baron Duveen of Millbank , 1869-1939, English art dealer, b. Hull. Beginning his career (1886) in his father's antiques firm, Duveen Brothers, he soon took over the business and expanded it to mammoth dimensions, presiding over galleries in London, Paris, and New York and speciali...
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psycholinguistics
psycholinguistics the study of psychological states and mental activity associated with the use of language. An important focus of psycholinguistics is the largely unconscious application of grammatical rules that enable people to produce and comprehend intelligible sentences. Psycholinguists inves...
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Herman Hollerith
Herman Hollerith , 1860-1929, American inventor, b. Buffalo, N.Y. After graduating from Columbia Univ. (B.S., 1879), he worked on the U.S. Census of 1880. Intrigued by the problem of tabulating vast amounts of data, he developed over the next several years a card that could be represent data through...
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Open Door
Open Door maintenance in a certain territory of equal commercial and industrial rights for the nationals of all countries. As a specific policy, it was first advanced by the United States, but it was rooted in the typical most-favored-nation clause of the treaties concluded with China after the ...
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Alexander III
Alexander III 1241-86, king of Scotland (1249-86), son and successor of Alexander II . He married a daughter of Henry III of England and quarreled with Henry, and later Henry's son Edward I , over the old English claims to overlordship in Scotland. The great achievement of Alexander was his fin...
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