visual dot probe experiment: position of words & pictures

[David McFarlane]

At 6/1/2011 05:42 PM Wednesday, Paul Groot wrote:
>The real difference between CRT and flat screens is that pixel the
>intensity curves are really different. CRTs have a very short (but
>intense) peak, while flat screens have a very constant intensity.
>(That's why CRT's flicker at low refresh rates and LCDs do not.)

Haven't measured this lately, but another difference we found a few 
years ago was that LCD pixels have a very long (> 100 ms) and 
biphasic offset.  That could pose a problem for some sensitive 
studies.  We have had to stockpile a bunch of CRTs for just this 
reason, nobody sells new ones anymore.

-- David McFarlane, Professional Faultfinder

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