two screens, two refresh rates: timing?

Michiel Spape Michiel.Spape at nottingham.ac.uk
Thu Jul 14 13:36:36 UTC 2011


Hi,
You're shooting topics around, aren't you :) Anyway, this is just to say: my experience is terrible, dreadful and horrible, when using screens in certain modes. Perhaps it is because we're using a switch, but essentially, I can do whatever I like, the screen in my lab won't do anything other than 60 Hz (on a CRT screen, mind you). A number of times, I got it to work better, but fidgeting with the small settings in the video driver menu is a nightmare. If you use E-Prime 2, you might be able to use multiple monitors in a more sane way, 'send this to display1, this to display2', and that ought to work. I imagine, however, that in my own situation (E-Prime 1), there is no such thing as 2 refresh rates; the primary system is the only thing that "exists", as far as E-Prime is concerned.
Anyway, very few tips from my side, just a word of caution: whether your E-Prime will say refresh rate is brilliant or not, see it for your own eyes anyway. On a CRT screen in a dark room, using the corners of your eyes, you should be able to see the difference between 60 Hz and 100 Hz.
Best,
Mich

Michiel Spapé
Research Fellow
Perception & Action group
University of Nottingham
School of Psychology
www.cognitology.eu


-----Original Message-----
From: e-prime at googlegroups.com [mailto:e-prime at googlegroups.com] On Behalf Of Tobias
Sent: 14 July 2011 13:42
To: E-Prime
Subject: two screens, two refresh rates: timing?

Hi,

in our lab we have a brand new flat screen that can run at up to 120
Hz (I use it at 100 Hz right now). We also have an additional screen
in the neighbor room to check if everything is alright with the
stimuli presented, to see the feedback the subjects gets etc. Anyway,
this second screen is not able to run at such high refresh rates. I
have set the screens as "clone".

I am wondering how E-Prime handles this concerning duration error,
onset delay, screen sync etc. Any experience with that?

Best,
Tobias

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