Screening 1928867 219456719 2008-06-15T09:17:53Z WuBot 7192839 robot Removing: [[no:Screening]] {{Wiktionary}} '''Screening''', in general, is the investigation of a great number of something (for instance, people) looking for those with a particular problem or feature. One example is at an airport, where many bags get x-rayed to try to detect any which may contain weapons or explosives. People are also screened going through a metal detector. Even though the procedure aims at a large number of screens, it is always equivalent to [[Sampling (statistics)|sampling in statistics]], because the complete population is almost always inaccessible for screening. '''Screening''' has other, more specific meanings: * [[Screening (printing)]], a process that represents lighter shades as tiny dots, rather than solid areas, of ink * [[Electric field screening]], in physics, the dampening of an electric field by mobile charges * In atomic physics and chemistry, screening effect refers to the observation that electronic properties of atoms are better described if atoms had a lower [[effective nuclear charge]] than that would be otherwise expected from the number of protons present * [[Screening (economics)]] * [[Screening (medicine)]] * [[Film screening]], the display of a film in a movie theatre or screening room, for some special purpose such as testing or critical review {{disambig}}