A phenomenon of visual processing in which certain line orientations are more quickly are more easily processed and discriminated than other line orientations.
It is based on two phenomena that are observed in visual perception: oblique effect and pop-out effect.
The oblique effect is the ability to more accurately perceive and judge line orientations that are close to vertical and horizontal, than line orientations that are oblique.
The pop-out effect is the tendency of certain elements in a display to pop out as figure elements, and as a result be quickly and easily detected.
Example: The image illustrates the pop-out effect, the lines that are 30 degrees away from the vertical line are quickly and easily detected.
Common Fate:
When elements move in the same direction, we usually see them as a unit and they seem to be more related to each other than elements that don't move in the same direction or at the same time.
Example: We see the points that are moving in the same directions as single groups.
http://coe.sdsu.edu/eet/Articles/visualperc1/Common.gif
Interference Effects:
In Societies today, cultures associate different icons and images with specific characteristics, such as colour. This makes interpretation and understanding of the visual faster and more efficient. Interference effects take place when characteristics or contexts of a particular symbol are changed, or crowded.
Example: When reading the word Blue written in Red, it will take longer for the reader to understand the word than when the word would be written in Blue.
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