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The Baskerville effect, or the Hound of the Baskervilles effect is a statistical observation that mortality through heart attacks is increased by psychological stress. It is named after the fictional Charles Baskerville from the Sherlock Holmes novel The Hound of the Baskervilles who died as a result of the stress of encountering the fierce dog after which the story is named.
It was discovered by David Phillips and his colleagues at the University of California, San Diego, who found that daily number of deaths of the 200,000 Chinese and Japanese Americans who died from heart attacks between 1973 and 1988 was 7% higher on the fourth of the month compared to the average for the other days in that week.
Four (四, formal writing: 肆, pinyin si4) is considered an unlucky number in Chinese and [[Culture of Japan|Japanese (as well as Korean) cultures because it sounds like "death" (死 pinyin si3). Some Chinese and Japanese hotels and hospitals do not use it as a room number.
His hypothesis was that the peak was caused by stress induced by the superstition surrounding this number. Previous research had also shown a complementary effect, mortality falling before auspicious occasions and rising again afterwards.
Smith(2002) offered an alternative statistical analysis which undermined the claims made for the effect.
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- Google Scholar
- Phillips DP, Liu GC, Kwok K, Jarvinen JR, Zhang W, Abramson IS. The Hound of the Baskervilles effect: natural experiment on the influence of psychological stress on timing of death. BMJ 2001; 323: 1443-1446Full Text.
- Phillips DP, King EW. Death takes a holiday: mortality surrounding major social occasions. Lancet 1988; ii: 728-732
- Phillips DP, Smith DG. Postponement of death until symbolically meaningful occasions. JAMA 1990; 263: 1947-1951
- Phillips DP, Ruth TE, Wagner LM. Psychology and survival. Lancet 1993; 342: 1142-11455.
- Glaser JH, Newcombe RG, Phillips D, Liu G, Kwole K, Jarvinen J, Zhang W, Abramson I. Hound of the Baskervilles effect [Letters]. BMJ 2002; 324: 1098Full Text.
- Smith,G. (2002). Scared to death? BMJ 325:1442-1443Full text
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