Thanks Maria, I will check. I am trying to set a Quest procedure to step down the coherence of the dots so that I can get a threshold measure for subjects on ...
hey mario- i need to do spatiotemporal filtering, using 3-d arrays for the source and kernel, where the 3rd dimension are sequential "frames". it's easy to do...
... As I understand it QUEST requires you to convert your x axis intensity scale into log10 unit. You do the QUEST computation on the converted intensity, then...
hmm, reading through EXPCreateStatic2DConvolutionShader i see your comments explaining the various approaches -- that addresses some of my questions about...
... Not according to Garcia-Perez' (1998) simulations. Simple up-down algorithms like the above converge on different points on the psychometric function...
Hi, This sounds like a dumb question, but I can't find the answer when I searched the forum. I need to install PTB3 on some Windows XP lab machines that, for...
jm_parkinson
jm_parkinson@...
Sep 30, 2008 2:38 pm
8736
No need for multiple calibrations, just do a drift correction before each trial. Use the function: "EyelinkDoDriftCorrection(el)" -This simply displays a...
bobcolner
bobcolner@...
Sep 30, 2008 10:57 pm
8737
Does anyone know whether there is a USB-parallel converter which iscompatible to at least MAC and PC? Our purpose is to write a set of TTL signal to an eye...
I've been having the same problem on a new iMac. In fact, I wasted the whole day yesterday waiting for the download to go (hoping it was just being really,...
r.tortell
r.tortell@...
Oct 1, 2008 5:55 pm
8739
Hi I am looking for a multimedia projector for our psychophysics experiment. Could anyone suggest a good one? Thanks in advance jesson Jessson Martin Ph.D ...
Martin, Jesson
jm61@...
Oct 1, 2008 6:47 pm
8740
Your day wasn't wasted, because maybe you solved it :-) Or at least gave the missing datapoint. I've updated the DownloadPsychtoolbox.m on the Wiki. With a bit...
Pay one, get three for free... You always get the full package, regardless from which operating system you are downloading, only the postinstallation routine...
Hi Erik, ... The idea is always to use the functions Add2DConvolutionToGLOperator or Add2DSeparableConvolutionToGLOperator to setup convolution, just as it is...
Perfect, works a treat. So I assume that I can just keep doing a similar thing with any updates: run the Update checker periodically on my networked Mac, and...
jm_parkinson
jm_parkinson@...
Oct 2, 2008 12:23 pm
8744
Hi all, I am attempting to write an experiment using random-dot stereograms. I was wondering if anyone has code for an experiment that they would be willing to...
I am working on an experiment looking at depth cues from texture. The set up is a two alternative forced choice task requiring the participant to choose which...
There is a decent template for you to work from here: http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=14859&objectType=File It's a...
Thanks Mark, As I understand it, you need to create a vector (A) of data between 15 and -15 to generate the stereogram. Do you have a sample file I could use...
Hello, I've been using DrawFormattedText to display text as part of an fMRI experiment in which each trial contains a statement that is about 4 lines long (I...
fatlilmonkey
emily.falk@...
Oct 6, 2008 4:13 am
8749
Which operating system? High quality text is generally slow to draw. But on MS-Windows, you could trade beauty against drawing speed by enforcing use of the...
It seems to me that you calculate the display time and then wait for certain amount of time for each trial. This is not good practically, especilly for fMRI....
Hi We are currently using an old Proxima Desktop projector, native resolution 832*624, 4-color, 100:1 contrast ratio. It works with typical VGA jacks. ...
At the moment, until I can either implement the Asio4All patch, or address the problem at a hardware level, I'm stuck using what InitializePsychSound says is a...
jm_parkinson
jm_parkinson@...
Oct 6, 2008 6:43 pm
8753
Yes. All timing will be inaccurate and variable, both sound onset timing as requested by 'when' as well as all returned timestamps whatsoever. The only way...
Thanks Mario. I'm using a MacBook with OSX. I'll try PsychImaging and see what I can do. Thanks also to Xiangrui for the timing suggestion. I have thought ...
fatlilmonkey
emily.falk@...
Oct 7, 2008 7:13 pm
8755
Hello, I see that Matrox gfx cards have been discussed already, but I wanted ask about the Matrox Parhelia specifically. The gist of my question is: In the...
Hi, I want to do some experiments with a PC (Windows XP SP2) which has a second screen connected to a Cambridge VSG 2/5 card. I initially thought I could use...
polosecki
polosecki@...
Oct 9, 2008 7:14 pm
8757
Have others received this or know what it is about? thanks, maria On September 8, Debbie Hept from your psychtoolbox group sent you an invitation to join...
Maria McKinley
parody@...
Oct 9, 2008 8:56 pm
8758
Hi Pablo, I just programmed a visual search experiment with the VSG and you should program it with the CRS Toolbox for Matlab. There are a lot of good examples...
ncp_lab
ncp_lab@...
Oct 10, 2008 3:30 pm
8759
... INTERNAL PSYCHTOOLBOX ERROR error: Psycherror_OpenGL general description: OpenGL call returned an error specific description:...
