varying interstimulus interval based on scanner pulse

[Binyam Nardos]

Fellow eprimers,
I have an experiment designed to display about 30 target stimuli separated by varying interstimulus intervals. Since this is an in-scanner experiment, I have an inline code which enables my experiment to listen to a scanner pulse and execute certain actions (such as end the duration of a stimulus or an interstimulus interval). Now what I'm trying to achieve is that instead of programming my interstimuls intervals to last for a given duration based on computer time ... I want them to last for an x number of scanner pulses ...  so instead of terminating a the interstimulus interval at the first instance of a pulse ...  it would terminate it on the second third or fourth etc .. instances of a pulse. 

Any help would be appreciated ..

Binyam

Binyam Nardos
Cognitive Rehabilitation Research Group
Washington University School of Medicine Box # 8505
4444 Forest Park Blvd
St. Louis, MO 63108
Office: (314) 454-7795
Fax: (314) 286-1601

 

The contents of this e-mail message and any attachments are intended solely for the addressee(s) named in this message. This communication is intended to be and to remain confidential and may be subject to applicable physician/patient and/or work product privileges. If you are not the intended recipient of this message, or if this message has been addressed to you in error, please immediately alert the sender by reply e-mail and then delete this message and its attachments.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listserv.linguistlist.org/pipermail/eprime/attachments/20071001/b3442b84/attachment.htm>