Eye tracking

Eye tracking is not required for a MTB experiment. If you do not want to use eyetracking, simply set the variable eye_tracker in your constants.py file to `False. The MTB framework currently only work with EyeLink eyetrackers.

EyeLink setup

You will need to install EyeLink Developers Kit for your OS to be able to do eyetracking. First sign up on SR Research Forum and then follow the instructions here:

https://www.sr-support.com/thread-13.html

Once you have installed EyeLink Developers Kit, you need to install the correct version of pylink. To do that, follow the instructions here:

https://www.sr-support.com/thread-48.html

** Do not pip install pylink. It will install another package with the same name!

Connecting to EyeLink

The code uses pylink to connect to the eyetracker. For that, you need to use an ethernet cable. You can use a USB to Ethernet adapter if your laptop does not have an Ethernet port. Once the laptop is connected to the EyeLink Host PC, modify the Eyelink local network as follows:

** go to ethernet settings and find the EyeLink network.

** “Change adapter settings”:

** Click on “Internet Protocol Version 4 (TCP/IPv4)” and click Properties

** Enter the following information:

• IP address: ‘100.1.1.2’

• Subnet: 255.255.255.0

• Gateway: leave blank