IoHub for eye tracking

[sarmad mueen abd al mushyb]

I have some questions about ioHub

1. can be used with Eye Tribe glasses?

2. Using ioHub is it possible to detect (sacaddic ,blinks , fixations)

My research is related to analyze eye movements so I need to know this information.


Regards 

[Hause]

I think the answers to both questions are yes, but you might want to have a look at this stackoverflow page.

[Sol Simpson]

I am not familiar with the Eye Tribe /glasses/, do you mean the $99 remote theeyetribe system? If so, it is supported by iohub except for a built in calibration process, so you need to run theeyetribe calibration program and then start your psychopy experiment.

[sarmad mueen abd al mushyb]

Yes , I mean the $99 eyetribe, can IoHub be used to prepossess it is data ?

Is IoHub able to  detect (fixation , Blinks and saccadic) ?

[Sol Simpson]

Currently iohub only provides the event types that the eye tracker itself provides at runtime, so for theeyetribe system only eye samples are available.

So you would need to parse the sample stream into fix / sacc / blink events yourself.

About a year ago I started working on an eye tracker independent parser that takes the sample stream and created fixation, saccade, and blink events at runtime. I ran out of time before it was good enough to suggest others to use though; it is very alpha right now, and has only been tested with the eyelink and tobii systems. So I would not even bother trying to use my parsing code right now. 

[Jibo He]

I am very interested in Sol's code to analyze fixation, saccade and blinks. I can be your alpha or beta testers, if you can share it.

There are several MATLAB toolbox to analyze eye movement data. Below is one

GazeAlyze: A MATLAB toolbox for the analysis of eye movement data

https://www.researchgate.net/publication/51625331_GazeAlyze_A_MATLAB_toolbox_for_the_analysis_of_eye_movement_data

Jibo

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[Sol Simpson]

Hi Jibo,

The iohub eye sample parser is implemented using the general purpose iohub event filter functionality. The code for the actual eye data parser can be found here. The code is very very alpha code (basically unused except for one contract I did).

I am going away for a week so do not have time to write some proper instructions on the intended use of the code and the iohub config file parameters that should be added. Let me know if you get it going based on the code comments, etc; otherwise I will try and send you an example that uses the parser in action.

We should probably move this discussion to the psychopy-dev list too. ;)

Thanks.