PsychoPy - EyeLink task: adding calibration between trial blocks

BaharSener · June 17, 2024, 4:43pm

Hello,

I modified an experiment I built on PsychoPy to run on EyeLink 1000 using the integration tutorials and examples. It worked smoothly until I decided to add two more calibration routines to the experiment. I would appreciate some help with this, I think it may be a screen size/window issue!

I have participants do memory encoding, followed by a 3-minute break before they answer retrieval questions. I was initially only calibrating at the beginning of the experiment but then decided to re-calibrate after the break because move during the break. I copied over the calibration code I had in the beginning. The calibration works, but then I am left with a gray screen at the beginning of the retrieval block.

I suspect there is an issue with how the screen/window is being set up. I see a gray screen after the calibration, but my print statements show that the retrieval trial starts (and I hear the sound that plays when the retrieval image is displayed). But because the screen is all gray, I cannot see anything or click the answers, so I quit the experiment.

I have my code here: I commented “#Recalibrate after the break” at the beginning of the calibration routines to make them easier to find. I would appreciate help with this!

github.com

baharsener/EyeTracking_PictureGame/blob/changes/EyeLink_TripletsGame_120722.py

#!/usr/bin/env python
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
This experiment was created using PsychoPy3 Experiment Builder (v2021.1.4),
    on July 13, 2022, at 13:52
If you publish work using this script the most relevant publication is:
    Peirce J, Gray JR, Simpson S, MacAskill M, Höchenberger R, Sogo H, Kastman E, Lindeløv JK. (2019) 
        PsychoPy2: Experiments in behavior made easy Behav Res 51: 195. 
        https://doi.org/10.3758/s13428-018-01193-y
"""

from __future__ import absolute_import, division
from __future__ import division
from __future__ import print_function

import psychopy
psychopy.useVersion('2021.1.0')
from psychopy import visual, core, event
# the rest of your script follows

This file has been truncated. show original

Thank you,
Bahar

BaharSener · June 17, 2024, 8:59pm

Found the solution! Because I was repeating the information, I was making another copy of the calibration window. Because that is set up at the beginning, all I needed to do was to have:

if not dummy_mode: try: el_tracker.doTrackerSetup() except RuntimeError as err: print('ERROR:', err) el_tracker.exitCalibration()

Replacing the setup code with this fixes the issue! Maybe this is super obvious to everyone else but I thought that I would need to make set up the calibration environment again to be able to calibrate after a break, so I’ll keep this solution here!

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PsychoPy - EyeLink task: adding calibration between trial blocks

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