Biopac not receiving E-Prime signal for second part of n-back task

[Paul Groot]

Hi Ashley,

seems pretty straightforward inline script. Just a few trivial checks:

Just declare the constant *OutPort* just once in the global use script
section. If this is done properly, you can remove the corresponding lines
from the two inline scripts.

Did you verify the values of "BioStim"? These should be numbers ranging
from 1 to 255. Also, the duration of TaskStimOne should be at least as long
as the sampling interval used by BioPac. You could verify this by enabling
logging of OnsetTime and OffsetTime of TaskStimOne for example. Another
method is to add a few Debug.Print statements:

Debug.Print "BioStim value: " & CInt(c.GetAttrib("BioStim"))
Debug.Print "TaskStimONE.Duration: " & TaskStimONE.Duration

And is TaskStimONE really the object that is used during the one back
phase?

If these checks don't help, you could test if the IO port is still
accessible by adding this below the WritePort statement:

WritePort OutPort, 0
Sleep 1000
WritePort OutPort, 255

This should always give a high pulse of one second on all digital lines.

best
paul


On 9 August 2013 19:08, Ashley Sanders <afsander12 at gmail.com> wrote:

> Hi all,
>
>  I am having trouble getting a stimulus delivery/response signal to show
> up on Biopac for the second part of our n-back experiment. The first task,
> zero back, asks the subject to press a certain key when a neutral face is
> presented (non-target) and another key when a scared face is presented
> (target). The inline script is as follows and works perfectly in connection
> with Biopac:
>
> Const OutPort As Integer = &hD800
> 'Const BioPacTrigger As Integer = &h01
>
> WritePort OutPort, 0
>
> TaskStimZERO.OnsetSignalEnabled = True
> TaskStimZERO.OnsetSignalPort = OutPort
> TaskStimZERO.OnsetSignalData = c.GetAttrib("BioStim")
>
> TaskStimZERO.OffsetSignalEnabled = True
> TaskStimZERO.OffsetSignalPort = OutPort
> TaskStimZERO.OffsetSignalData = 0
>
> Next, the one back section asks the subject to only press the target
> assigned key after *two* scared faces have been presented in a row. This
> is where Biopac is not collecting a signal. The inline script is as follows:
>
> Const OutPort As Integer = &hD800
> 'Const BioPacTrigger As Integer = &h01
>
> WritePort OutPort, 0
>
> TaskStimONE.OnsetSignalEnabled = True
> TaskStimONE.OnsetSignalPort = OutPort
> TaskStimONE.OnsetSignalData = c.GetAttrib("BioStim")
>
> TaskStimONE.OffsetSignalEnabled = True
> TaskStimONE.OffsetSignalPort = OutPort
> TaskStimONE.OffsetSignalData = 0
>
>
> I have tried numerous ways to get this to work but have failed. If anyone
> has any advice, please let me know. Your help would be GREATLY appreciated!
>
>
> Thanks in advance,
> Ashley
>
> --
> You received this message because you are subscribed to the Google Groups
> "E-Prime" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to e-prime+unsubscribe at googlegroups.com.
> To post to this group, send email to e-prime at googlegroups.com.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/e-prime/d53d8de5-2b05-4ee2-a466-9a15a471e6f8%40googlegroups.com
> .
> For more options, visit https://groups.google.com/groups/opt_out.
>
>
>

-- 
You received this message because you are subscribed to the Google Groups "E-Prime" group.
To unsubscribe from this group and stop receiving emails from it, send an email to e-prime+unsubscribe at googlegroups.com.
To post to this group, send email to e-prime at googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/e-prime/CAKAdR-uZ9MOF__3qQaHmQifVQ_3X0ENCqt4Frs8v8PG4L9CTgA%40mail.gmail.com?hl=en-US.
For more options, visit https://groups.google.com/groups/opt_out.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listserv.linguistlist.org/pipermail/eprime/attachments/20130810/65394f66/attachment.htm>