We are trying to use PsPM software to analyze individuals skin conductance response to rewards and punishments during a learning task. However, in our experimental paradigm the reward and punishment are registered under different marker channels within the Acknowledge file. As a result, we have two conditions:reward and punishment. Since, this is a learning task each participant is rewarded/punished depending on their performance and the markers for reward and punishment are interspersed across the task. As such, it is impossible for us to combine marker channels and then assign specific marker numbers for each condition. Therefore, the order of rewards/punishments would be different for each participants. We are wondering if it is possible to assign conditions based on different marker channels.
Do you think that we can use PsPM to analyze our data?
Thank you very much for your help,
Azman
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thank you for the message. It would certainly be possible to use the data within PsPM. Since you can specify an event onset file for each participant, it is no problem that the events are participant-specific. However, to combine the marker channels you would have to do a bit of matlab coding.
Perhaps you could have a look at this request and let me know whether this clarifies things.
Thank you, Dr. Bach, for replying. I think I will be able to combine the marker channels. However, it looks like this way I would not be able to run all the participants in one batch.
I am wondering if there is a way to avoid having to specify an event onset for each participant individually (we have about 200 participants). Perhaps I could somehow specify each condition (reward and punishment) by using different marker channels without combining them.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
I was actually able to figure this out by using the timing files and the code that you provided for the DCM part of the manual. I modified the code to suit our needs. Here is the code for creating timing files in GLM for multiple participants in case someone else wants to use it.
Hi Dr. Bach,
We are trying to use PsPM software to analyze individuals skin conductance response to rewards and punishments during a learning task. However, in our experimental paradigm the reward and punishment are registered under different marker channels within the Acknowledge file. As a result, we have two conditions:reward and punishment. Since, this is a learning task each participant is rewarded/punished depending on their performance and the markers for reward and punishment are interspersed across the task. As such, it is impossible for us to combine marker channels and then assign specific marker numbers for each condition. Therefore, the order of rewards/punishments would be different for each participants. We are wondering if it is possible to assign conditions based on different marker channels.
Do you think that we can use PsPM to analyze our data?
Thank you very much for your help,
Azman
We have attached an example of our file.
In this file, the marker channels represent the following things:
Marker2 = Stimulus Presentation
Marker3 = Punishing Feedback (following the incorrect response to stimulus)
Marker4 = Rewarding Feedback (following the correct response to stimulus)
Marker5 = Start-Stop
Dear Azman
thank you for the message. It would certainly be possible to use the data within PsPM. Since you can specify an event onset file for each participant, it is no problem that the events are participant-specific. However, to combine the marker channels you would have to do a bit of matlab coding.
Perhaps you could have a look at this request and let me know whether this clarifies things.
https://sourceforge.net/p/pspm/discussion/help/thread/d9d3fb87/
Best wishes
Dominik
Thank you, Dr. Bach, for replying. I think I will be able to combine the marker channels. However, it looks like this way I would not be able to run all the participants in one batch.
I am wondering if there is a way to avoid having to specify an event onset for each participant individually (we have about 200 participants). Perhaps I could somehow specify each condition (reward and punishment) by using different marker channels without combining them.
Hi Dr. Bach,
I was actually able to figure this out by using the timing files and the code that you provided for the DCM part of the manual. I modified the code to suit our needs. Here is the code for creating timing files in GLM for multiple participants in case someone else wants to use it.
Thanks
Azman