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contrast |
Also found in: Dictionary/thesaurus, Medical, Wikipedia, Hutchinson | 0.26 sec. |
contrastThe white level of a display screen. The contrast adjusts how bright the white is. See brightness and contrast ratio. contrast 1. (in painting) the effect of the juxtaposition of different colours, tones, etc. 2. a. (of a photographic emulsion) the degree of density measured against exposure used b. the extent to which adjacent areas of an optical image, esp on a television screen or in a photographic negative or print, differ in brightness 3. Psychol the phenomenon that when two different but related stimuli are presented close together in space and/or time they are perceived as being more different than they really are How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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In the study, 263 subjects were educated about six CRC screening tests: colonoscopy, flexible sigmoidoscopy, FOBT, flexible sigmoidoscopy plus FOBT, double contrast barium enema and sDNA. Individuals who had undergone colonoscopy, sigmoidoscopy or double contrast barium enema within the preceding 10 years or a positive fecal occult blood test within six months were excluded, as were those with inflammatory bowel disease, familial adenomatous polyposis or hereditary non-polyposis colon cancer, more than one first degree relative with colorectal cancer, or any first degree relative with colorectal cancer before age 50. |
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