Foreground contextual condtioning occurs when an emotionally salient event (such as a shock or some food) is presented in an environment (a context) with no discrete cues to predict it. In this case, the context is the most direct predictor of the salient event and conditioning to the context will be strong. Background contextual conditioning occurs when the same emotionally salient event is presented in a context but each event is predicted by a discete cue (for example, a tone that comes on for 10 seconds before the shock is delivered). The context is always "on" or there (in the "background")and gives no timing about when the shock will happen. The tone only appears when the shock is about to be delivered. In this case there are still pairings of the context and the shock and some conditioning will accrue to the context, however this will be less than would occur if the cue was not present. In this case, the tone cue is in the "foreground" and the rat will learn that the tone predicts the shock, and this learning will "block" learning about the context since the tone is a better predictor of the shock.
Often background colours won't be as bright as those in the foreground. They are sometimes fuzzier and more blended and you don't see the difference in cloud as easily.
The opposite of foreground is background.
background
Foreground - The part closest to the viewer. Middleground - the part inbetween the foreground and background. Background - The part farthest away from the viewer.
the foreground is the area in front of your subject while the background is the area behind your subject.
You don't. Moving from foreground to background, etc., happens outside of the 'vi' editor.
A possible analogies for background: * background - foreground as back - front
a l i e n
The background in a film is the setting of the scene where the actors occupy the foreground.
You suspend a running (foreground) job by using the suspend keystrokes (usually ^Z). A background job can be suspended from the background if it understands the suspend or other user kill signals. In general, however, you have to bring the background program into the foreground and then suspend it by using the action listed above.
Where the background and foreground meet
Forced perspective is the technique that is used when the size of objects and people in the background is diminished to create the illusion of greater foreground-to-background distance.