The display (and subsequent assimilation) of information are usually based on observation (active and participatory) and reading of a text in a paper or other physical means, eg computer. As outlined in the previous lines, so this common reading required a clear participation of the recipient of the information or reader, an active and vital. For that reason, the correct and optimum assimilation of information can be limited by the capabilities of the reader receiver. During the reading of a text on paper the human visual system performs three different tasks:
1) fixed or gaze fixations to process the information.
2) or learned saccadic movements, which serve as transitional elements between fixing and fixing.
3) return sweeps are used to change the line.
These last two eye movements are made very quickly (40 and 50 ms, respectively) fixations, however, require considerably more time (230 ms for skilled readers and especially to the reader 330 ms average).
PVSR reading is, as already mentioned, in sequence, the text is displayed on screen using small parts or fragments in a small area. Each would contain a fragment or a word depending on the width of the screen presentation. Therefore, if you read the text comes with PVSR himself, saccadic eye movements and scan back and reducing the role of the receiver or reader of the information is less compelling. In short, reading becomes more agile, dynamic and requires less space.
The speed of the presentation of text, andalusia PVSR used is measured, usually expressed in words per minute (WPM). The exposure time of each block of text is calculated based on the overall presentation and how much speed can be displayed on screen presentation of text. There is little or almost no study about how one can calculate exactly the time of exposure. However, have been fixed in general.
Simulation (exaggerated) of a traditional process of reading. The reader performs fixations, saccadic movements and changes of line.
Simulation of a process of reading PVSR (basic scheme: it does not exhibit any similarity to a real system PVSR). As you can see the text displayed fragmented and sequentially.