[Eeglablist] Curry 9 EEG Data Event Duplication

[Kim, John]

Hi Samuel,

Could it be a response event is being recorded?
Depending on the way CURRY is interfaced with the computer, you may see an event for the response.

Particularly, as your second event is occurring between 300-600ms this is somewhat typical of the response time.

Thank you,


--

Jeongwoon (John) Kim, M.S.
PhD. Student, Department of Kinesiology and Community Health
Graduate Program Assistant - Personal Training, Campus Recreation

Neurocognitive Health Behavior Laboratory
University of Illinois at Urbana-Champaign
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906 South Goodwin Ave., Urbana, IL 61801
217.300.2197 | jk51 at illinois.edu

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________________________________
From: eeglablist <eeglablist-bounces at sccn.ucsd.edu> on behalf of Torres,Samuel A via eeglablist <eeglablist at sccn.ucsd.edu>
Sent: Tuesday, August 27, 2024 3:52 PM
To: eeglablist at sccn.ucsd.edu <eeglablist at sccn.ucsd.edu>
Subject: [Eeglablist] Curry 9 EEG Data Event Duplication

Dear EEGLab team,

I am importing Neuroscan Curry 9 .CDT files into EEGLab using the loadcurry plugin. When looking at the data, I noticed my event triggers are nearly all duplicated for one of my tasks, compared to Neuroscan Scan .CNT files. Nothing else has changed between these two systems except a new headbox. The stimulus computer (running Psychopy) has been sending the triggers in the exact same way, using the same code. But the Curry .CDT files have nearly twice the number of triggers. When visualizing, it appears that the first version of the duplicated trigger in time is appearing at the correct times, and the redundant duplicated triggers appear around 300 to 600 ms after the original correct.

Does anyone know if there is a known issue with either Curry 9 files or the Loadcurry plugin for EEGLab duplicating the events that are sent as triggers?

Thanks in advance,
Samuel




Samuel A Torres | Research Coordinator

Center for Addiction Research & Education | Neurocognitive Laboratory

Department of Psychiatry | College of Medicine | University of Florida

PO Box 100258| Gainesville, FL  32610-0258

1395 Center Drive, D2-013 | Gainesville, FL  32610

Office: 352-294-4939 | Email: torres.sam at ufl.edu<mailto:torres.sam at ufl.edu>
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