http://tech.groups.yahoo.com/group/psychtoolbox/ Psychophysics Toolbox Tue, 10 Nov 2009 03:14:39 GMT leannelaychan http://tech.groups.yahoo.com/group/psychtoolbox/message/10273 http://tech.groups.yahoo.com/group/psychtoolbox/message/10273 Hello, I would like to move the drift grating (from DriftDemo), using the cursor coordinate as the eccentricity of the draft grating pattern. What functions I Tue, 10 Nov 2009 02:36:55 GMT Mario http://tech.groups.yahoo.com/group/psychtoolbox/message/10272 http://tech.groups.yahoo.com/group/psychtoolbox/message/10272 Leanne, do a test run (without changing VTOTAL) and just post the full Matlab output here. And if you run PerceptualVBLSynctest(screenid) with screenid being Tue, 10 Nov 2009 01:38:44 GMT leannelaychan http://tech.groups.yahoo.com/group/psychtoolbox/message/10271 http://tech.groups.yahoo.com/group/psychtoolbox/message/10271 I changed the VTOTAL parameter to the real height, i.e. 800 in my display resolution. Then I call Screen('Preference', 'VBLEndlineOverride', VTOTAL); It solves Tue, 10 Nov 2009 00:01:42 GMT Mario http://tech.groups.yahoo.com/group/psychtoolbox/message/10270 http://tech.groups.yahoo.com/group/psychtoolbox/message/10270 No. Quit Matlab, restart, retry. You can ignore the pageflipping warning, but something else is obviously wrong, and the matlab console must show new warnings Mon, 09 Nov 2009 23:29:52 GMT leannelaychan http://tech.groups.yahoo.com/group/psychtoolbox/message/10269 http://tech.groups.yahoo.com/group/psychtoolbox/message/10269 After running PerceptualVBLSyncTest, I saw a big inverted triangle with an exclamation mark. Then, the screen flickered in a homogenous fasion. Afterwards, I Mon, 09 Nov 2009 23:29:32 GMT Qingyang Li http://tech.groups.yahoo.com/group/psychtoolbox/message/10268 http://tech.groups.yahoo.com/group/psychtoolbox/message/10268 Hi Mario, Thank you very much for your help and suggestions. I think I can live with just 1 line of TTL so the USB-Serial converter option might also work for Mon, 09 Nov 2009 22:54:35 GMT Mario http://tech.groups.yahoo.com/group/psychtoolbox/message/10267 http://tech.groups.yahoo.com/group/psychtoolbox/message/10267 Run PerceptualVBLSyncTest. If you don't see tearing, but only homogeneous flicker then pageflipping is likely active. I believe it is a false alert, esp. if Mon, 09 Nov 2009 22:22:48 GMT leannelaychan http://tech.groups.yahoo.com/group/psychtoolbox/message/10266 http://tech.groups.yahoo.com/group/psychtoolbox/message/10266 Thanks Dee and Mario for your replies. I am using Windows XP Professional Version 2002 SP3. Any insights? - Leanne Mon, 09 Nov 2009 20:20:02 GMT Mario http://tech.groups.yahoo.com/group/psychtoolbox/message/10265 http://tech.groups.yahoo.com/group/psychtoolbox/message/10265 Depends how many trigger lines you need. A USB-Parallel converter won't work, these don't provide the low-level protocol for controlling TTL lines, only the Mon, 09 Nov 2009 19:15:38 GMT David Jones http://tech.groups.yahoo.com/group/psychtoolbox/message/10264 http://tech.groups.yahoo.com/group/psychtoolbox/message/10264 Hi, I am hunting for a PHP implementation of the QUEST procedure that is available in the PsychToolbox. I would like to be able to do some simple visual Mon, 09 Nov 2009 18:26:04 GMT Mario http://tech.groups.yahoo.com/group/psychtoolbox/message/10263 http://tech.groups.yahoo.com/group/psychtoolbox/message/10263 UpdatePsychtoolbox and issue 2 should solve itself, unless you have an old Matlab version or they were disabled for a good reason, e.g., detected problems. 1. Mon, 09 Nov 2009 18:23:14 GMT Mario http://tech.groups.yahoo.com/group/psychtoolbox/message/10262 http://tech.groups.yahoo.com/group/psychtoolbox/message/10262 ... Maketexture to present images that were precomputed in Matlab, e.g., by a formula, or images loaded from filesystem via imread() etc. Offscreen windows if Mon, 09 Nov 2009 18:17:00 GMT Mario http://tech.groups.yahoo.com/group/psychtoolbox/message/10261 http://tech.groups.yahoo.com/group/psychtoolbox/message/10261 Ok, good to know that Quicktime Version 7.1.6 works. Mon, 09 Nov 2009 18:16:16 GMT Mario http://tech.groups.yahoo.com/group/psychtoolbox/message/10260 http://tech.groups.yahoo.com/group/psychtoolbox/message/10260 I doubt this is a driver bug, but maybe something went wrong during the installation of the new drivers? E.g., maybe some old configuration setting trash was Sat, 07 Nov 2009 18:51:25 GMT todd_horowitz http://tech.groups.yahoo.com/group/psychtoolbox/message/10259 http://tech.groups.yahoo.com/group/psychtoolbox/message/10259 Thanks, Loren and Andreas. Those were both useful suggestions. The main problem is that I hadn't quite realized it was stats toolbox, not a regular built in