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<DIV>in the litreature of reaction time experiment some studies use an english letters <BR> as stimuli for participants ( e.g A a / B b / O X )& I want to use its in some of my exp. to compare the speed of reaction to the english letters and words & arabic<BR>letters and words but the problem is the feature of these letters with visual angle . ( ex . letter "A" with 1.3 X 0.9 viual angle ).So How to create a visual stimulus if I have a visual angle of it .</DIV></DIV></DIV></div><br clear=all><hr>Get a speedy connection with MSN Broadband. Join now! <a href="http://g.msn.com/8HMDEN/2021">Click Here</a> </html>