The perceptual span and eye hand span of pianists were examined while they played and read single-line melodies ( with four beats per measure ).
2.
The perceptual span was measured by the use of a moving-window technique with four window conditions : two beats, four beats, six beats, or no window.
3.
The various gaze-contingent techniques has given eye-movement researchers the ability to observe the processing of visual input in much greater detail ( particularly its temporal characteristics ), the perceptual span, and the nature of peripheral processing in reading.
4.
"' Vision span "'or "'perceptual span "'is a controversial concept in speed reading referring to the angular span ( vertically and horizontally ), within which the human eye has sharp enough resolution in the macula, where there is a higher density of cone cells.
5.
If the perceptual span includes all or many of the words on a line of text, then eye movement measures would not likely reveal much information about cognitive processing; however, if the reader gains useful information only from the word directly focused on, then eye movement behavior could shed light on what role the eyes play in reading disorders such as dyslexia.
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