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why reading on a screen slower than on paper?
Annaannaanna
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8
3-31-2007 7:36 AM
495 views
tags:
reading
,
study
,
students
,
school
,
eyes
,
screen
,
computer
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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/df79fa48-a196-4378-938c-331878a1afae/1A160FD3-CC49-4517-95BA-C8F424E9F812/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.readingsoft.com/fr/frfaq2.html" href="http://www.readingsoft.com/fr/frfaq2.html" style="font-size: 11px;">www.readingsoft.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.readingsoft.com/fr/frfaq2.html"><H4>Reading from Screens? <A href="#topq" name="screen">[ Haut ]</A></H4></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.readingsoft.com/fr/frfaq2.html"><P>Font aliasing and screen flicker are the two important factors that lower efficiency when reading from screens. Font aliasing is because the edges of characters are not smooth but step-like. Flicker is due to the fact that the screen is refreshed about one hundred times per second. Though not perceived consciously, the added noise generally penalizes reading. Tiny and fast eye movements occur during fixation. This so called tremor has a magnitude of less than the thickness of a character line and a frequency of 100 cycles per second. Tremor is used to analyze the outline of objects and to refresh the output of the eye detector cells. Current screen and antialiasing technologies have still to improve as the eyes notice flickering up to 400 Hz. </P></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;"> </td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/1A160FD3-CC49-4517-95BA-C8F424E9F812/blog/" title="blog or email this clip"><img src="http://content7.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>
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