[Eeglablist] Trigger manipulation

[Haggarty, Connor]

Hi,



I have a question about changing trigger codes for epochs.

I am completing a study with somatosensory stimuli.

One trigger is sent by E-Prime which codes the speed of stroking touch (delivered by the experimenter), sometime after this a trigger is sent from a laser showing the exact point at which the experimenter first touches the participant.

The laser is the precise onset of touch however, this code is the same each time. In order to epoch and bin these data properly I need a way to code the laser trigger so that it is an addition (or some calculation) of the previous (stimulus type) trigger and the precise stimulus laser onset trigger.

Is there some function in EEGLab or some coding that will allow me to do this?



Thank you



Connor

________________________________
Important Notice: the information in this email and any attachments is for the sole use of the intended recipient(s). If you are not an intended recipient, or a person responsible for delivering it to an intended recipient, you should delete it from your system immediately without disclosing its contents elsewhere and advise the sender by returning the email or by telephoning a number contained in the body of the email. No responsibility is accepted for loss or damage arising from viruses or changes made to this message after it was sent. The views contained in this email are those of the author and not necessarily those of Liverpool John Moores University.