eprime and Netstation communication

[Navi]

Dear all,

I am facing a difficulty with marking the type of response selected in the ERP file using Netstation(2.0.0.88) and Eprime(2.0) for a cueing task.

The task involves two types of response by hitting keys: 'p' or 'q'.

I am getting a tag 'resp' for the response(same for both) but can not know what response was selected by looking at the erp file though in the behavioral it is specified.

Do I need to write any codes for this?

It would be great if any one could help!

Thanks!

[Rauf Subhani]

Hi Navi,

Tag 'resp' remains the same for both types of responses as you would have mentioned in your stimulus properties. But you can distinguish between two responses using CellNumber and CellLabel. Whatever stimuli do 'p' and 'q' represent, when you define these stimuli in your TrialList give different CellNumber to stimuli, e.g.,

Stimulus type = 1   CorrectResponse = p    CellNumber = 1

Stimulus type = 2   CorrectResponse = q    CellNumber = 2

Then in the unreferenced E-Objects create a CellList. In this CellList you can give different CellLabels against the CellNumbers.

By doing this, you can segment your EEG data in NetStation. In segmentation tool you select your raw EEG file. Your code will be 'resp' and your cell will be the CellLabel which you give to that stimulus in E-Prime.

[Navkiran Kalsi]

Thanks a lot Rauf!

It solved my problem!

Regards,

Navi

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