Daniel Stout

So instead of having negative values for the onset of the absence of a US, I should include the actual time stamp of when the omission would occur? In other words, if the onset of a US omission is 100 seconds, I would keep it at 100 instead of -100? I created two different events. The first one was a 2-column matrix with the onsets and offsets for the 44 CS events I have in the task. The second event is a 1-column matrix with onsets for the 44 presence/absence of US events. Then under the condition...

Hi Dominik, I think I get the concept for the events now. I was entering them like the GLM previously and that is why I was getting the error. So basically, for my fear learning study I only have two types of events: 1) CS and 2) US. Using this, the model is running now! Per the manual, for creating a US event vector, it says that I can enter negative values for the onsets of events that do not have a US. Is that correct? Thanks, Danny

Hi Dominik, Thank you for your helpful reply. Yes, my CS is fixed at 7.5 seconds. Regarding the set-up for DCM, I am a bit confused as to how to set-up the events through the GUI. I am currently entering everything manually. A few questions: 1) To enter the timing files, do I create a new event for each condition like I tried with the GLM (6 events for 6 conditions)? 2) Since this is conditioning task, I should use the 2-column flexible latency approach with event onset in column 1 and event offset...

Hello, I am new to the PsPM software. I would definetly like to use this for my SCR analyses. I have played around with the toolbox a bit with some data from a fear conditioning task. I have a few questions based off of what I am observing at the single subject level. 1) I see that there is a very robust negative deflection for my CS+ condition (see CON+ in the attached figure) and then a later positive deflection. I ran a glm SCRF 1 where I modeled the duration of each stimulus as well (7.5sec instead...