# Eyelink Toolbox question and request: Anti-saccade task

**URL:** <https://psychtoolbox.discourse.group/t/eyelink-toolbox-question-and-request-anti-saccade-task/1968>\
**Category:** Uncategorized\
**Created:** [February 19, 2009, 10:05pm UTC](https://psychtoolbox.discourse.group/t/eyelink-toolbox-question-and-request-anti-saccade-task/1968 "2009-02-19T22:05:04Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Allen\_Ingling](https://avatars.discourse-cdn.com/v4/letter/a/a183cd/32.png) [@Allen\_Ingling](https://psychtoolbox.discourse.group/u/Allen_Ingling)\
**Post date:** [February 19, 2009, 10:05pm UTC](https://psychtoolbox.discourse.group/t/eyelink-toolbox-question-and-request-anti-saccade-task/1968/1 "2009-02-19T22:05:04Z")

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So, I'm about to sit down and start programming up a standard anti-saccade task for a class demonstration and eventual experimentation and I thought, Hey, perhaps someone has already done this and is willing to share??? Any takers? 

  

Barring that, I have two questions. 

  

1. Why when I run the EyelinkExample.m script, I cannot see the eyes and head markers as I can when I run a standard c-script from Eyelink?

  

2. Why when I do a calibration within the PsychToolbox, I get many more "errors" and generally poorer calibration when when I do this with the programs supplied by SR research?

  

That's it for now, but I'm sure that there will be more questions as I dive into this new aspect of PsychToolbox programming.

  

David Shore

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**Author:** ![franswcornelissen](https://avatars.discourse-cdn.com/v4/letter/f/df705f/32.png) [@franswcornelissen](https://psychtoolbox.discourse.group/u/franswcornelissen)\
**Post date:** [March 12, 2009, 12:23pm UTC](https://psychtoolbox.discourse.group/t/eyelink-toolbox-question-and-request-anti-saccade-task/1968/2 "2009-03-12T12:23:13Z")

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hi jochen  
  
the time is mainly the issue at stake here.   
thanks for pointing towards the new code. unfortunately, i can't seem to  
download the attachment anymore (when logged in).  
  
gr.  
frans  
  
  

> --- In [psychtoolbox@yahoogroups.com](mailto:psychtoolbox@yahoogroups.com), Jochen Laubrock \<laubrock@...\> wrote:  
> \>  
> \> Hi,  
> \>   
> \> On Feb 19, 2009, at 23:05, David Shore wrote:  
> \>   
> \> \> 1. Why when I run the EyelinkExample.m script, I cannot see the eyes   
> \> \> and head markers as I can when I run a standard c-script from Eyelink?  
> \>   
> \> I imagine that might be because nobody has had the time and/or   
> \> intimate knowledge of both psychtoolbox and eyelink to incorporate the   
> \> required functions (as documented in chapter 11 of the Eyelink   
> \> programmer's manual) into psychtoolbox.  
> \>   
> \> Should be a lot easier than it used to be, because SR research now   
> \> provide a demo of using OpenGL as the graphics subsystem (used to only   
> \> available for SDL), see  
> \> [https://www.sr-support.com/forums/showthread.php?t=810](https://www.sr-support.com/forums/showthread.php?t=810)  
> \> [https://www.sr-support.com/forums/attachment.php?attachmentid=573](https://www.sr-support.com/forums/attachment.php?attachmentid=573)  
> \>   
> \> Just a guess,  
> \> Jochen  
> \>