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Perspicacity (also called perspicaciousness) is a penetrating discernment—a clarity of vision or intellect which provides a deep understanding and insight. In 17th century Europe René Descartes devised systematic rules for clear thinking in his work ''Regulæ ad directionem ingenii'' (Rules for the direction of natural intelligence). In Descartes' scheme, intelligence consisted of two faculties: perspicacity, which provided an understanding or intuition of distinct detail; and sagacity, which enabled reasoning about the details in order to make deductions. Rule 9 was ''De Perspicacitate Intuitionis'' (On the Perspicacity of Intuition). He summarised the rule as In his study of the elements of wisdom, the modern psychometrician Robert Sternberg identified perspicacity as one of its six components or dimensions; the other five being reasoning, sagacity, learning, judgement and the expeditious use of information. In his analysis, perspicacity was described as In an article dated October 7, 1966, the journal ''Science'' discussed NASA scientist-astronaut program recruitment efforts: Being perspicacious about other people, rather than having false illusions, is a sign of good mental health. The quality is needed in psychotherapists who engage in person-to-person dialogue and counselling of the mentally ill. The artist René Magritte illustrated the quality in his 1936 painting ''Perspicacity''. The picture shows an artist at work who studies his subject intently: it is an egg. But the painting which he is creating is not of an egg; it is an adult bird in flight. ==See also== *Neuro-linguistic programming *Organizational politics *Stress management *Time management *Personality *Temperament 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「perspicacity」の詳細全文を読む スポンサード リンク
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