# Standard Operating Procedure ### Data collection deadline: May 18^th, 2024. ---------- ## How to setup the experiment See: [How to setup the experiment](https://osf.io/4ux8r/wiki/How%20to%20setup%20the%20experiment/) ---------- ## Requirement for the recording - #### **PO7/PO8** - **Two horizontal eye electrodes (outer canthus of the left *and* right eye).** - **Two vertical eye electrode (below *and* above [can be Fp1/Fp2]).** - **Both mastoids.** - **Record all electrodes (including EOG) with the same reference (i.e., no linked EOG or linked mastoids).** - Recordings should be made with a sampling rate of at least 400 Hz. Everything above that is also fine. - Do not use online filters (beyond those necessary for technical reasons). - This includes online line-noise removal (e.g., actiCap "Active Shield"). - Save impedances. - If recording with a BioSemi system please place the CMS and DRL electrodes in their standard cap positions (i.e., left and right from POz). - Record the EEG file with the following name: - *YourTeamName*_**EEG**_Eimer1996_Sub*Nr*.extension (there can be leading zeros before the subject number) - For instance: Munich_EEG_Eimer1996_Sub0032.vhdr - Record the behavioral file with the following name: - "*YourTeamName*_**Behavior**_Eimer1996_Sub1.csv" - If you also take part in the #EEGManyLabs Resting State project (https://osf.io/sp3ck/), please record two EEG files (one of the resting state, one for Eimer's task). ---------- ## Participant inclusion criteria - Older than 18 and than the age of majority in the region where data is collected. - No colorblindness. - Normal or corrected-to-normal vision. ---------- ## Data to collect besides the EEG and behavioral data - Age. - Gender. - Handedness. - Education including total years and highest qualification. ---------- ## Instructions for the experimenter - Dim or turn off the lights in the recording room. - Instruct the participants to respond with a different hand for each key. If using the mouse buttons, then the mouse can be held in both hands and the buttons pressed with each thumb. - Instruct the participant not to make eye movements to the target. The purpose of the practice block is to train participants not to move their eyes and it runs until the spacebar is pressed. - Thus, **the experimenter should press the spacebar when the participants are not making systematic eye movements anymore**.<br> Participants might not notice that they're moving their eyes, so do not hesitate to interrupt participants if you notice eye movements.<br> If you notice many eye movements during the main phase of the experiment, please remind the participants not to move their eyes. - Any trial with a blink or an eye-movement between -100 ms and 600 ms (relative to target onset) will be rejected. - Any participant with less than 100 trials in any critical condition will be rejected. - If you need to pause the experiment within a block, press the `Escape` key. Press `space` to resume it. - The markers are sent as such and might therefore appear cluttered together when monitoring: - Display onset (111 to 223). - 150 ms later: display offset (50). - 2000ms later: Response marker (1, 2 or 3). - A few ms later: Display onset. ---------- ## Upload instructions After recording the pilot, please send the pilot's data (EEG and Behavioral), as well as the video of the experimental environment to martin.constant@unige.ch or heinrich.liesefeld@uni-bremen.de so that we can check that everything is alright.<br>If you need a solution to upload those, please email us and we will send you a link. Once your pilot dataset and video are approved, we will provide you with a link to upload the data on a server hosted at the Ludwig-Maximilians-Universität München. The trial and participant exclusion criteria are quite strict, so don't hesitate to analyze the data every 3-4 participants and ask for help if needed. ---------- ## Additional information to report when uploading the data - EEG system used (with the online filter settings used) and electrode impedances. - The electrode layout used (especially for electrodes with non-standard names [e.g., EXG1 on BioSemi]). - Whether the experiment was conducted in an electrically-shielded cabin or not. - Line frequency in your region. - Screen used for stimulus presentation. - Any additional quality checks you performed (according to your standard operating procedure). ---------- ### **The raw data will be made publicly available according to the FAIR principles. <br> Please ensure that your informed consent form and ethics committee allow that. <br> If possible, use the [Open Brain Consent Form](https://open-brain-consent.readthedocs.io/en/stable/ultimate.html) (Bannier et al., 2020; https://doi.org/h59b).** #### Authors:<br> Martin Constant (martin.constant@unige.ch) <br> Heinrich R. Liesefeld (heinrich.liesefeld@uni-bremen.de)