Using Cedrus RB-844 and Cedrus m-pod w/ Inquisit 5 for task synchronization to EEG machine

ayoforyayo11 — Mon, 28 Oct 2019 18:21:26 GMT

Hi,

I'm looking for some help with using the m-pod to communicate from Inquisit to an EEG machine.
I am using the following system to collect EEG data synchronized with task data:

Task software: Inquisit 5
Response pad: Cedrus RB-844 response pad
EEG: Nihon Kohden EEG-1200 cart (https://us.nihonkohden.com/products/eeg-1200/)
Sync method: Cedrus m-pod connected to RB-844 (via display port) and to EEG at 16-pin DC input.

Summary: PC runninginquisit --(usb)--> RB-844 --(display port)--> m-pod --(16-pin DC)-->EEG
My goals

To see button presses show up in the EEG data (RB --> m-pod --> EEG)
To see TTL/event markers sent from my Inquisit script in the EEG data (PC --(bypass RB)--> m-pod --> EEG)

I need to be able to mark when unique events happen that don't align with a button press.

Currently, I am able to do #1. When a button is pressed, I see the m-pod light up, and I see a deflection on the EEG through one of the DC channels.

All that was required for this was the EEG data collection settings to be configured to record from the DC port. So at least I know that if I can get the m-pod to light up, I'll be able to see it in the EEG data.

I am stuck on #2.Cannot get the m-pod to light up from a command in Inquisit

I have tried to send signals through Inquisit's parallel and serial port tool: https://www.millisecond.com/support/docs/v5/html/howto/howtoportmonitor.htm

I'm not sure if this is a parallel port or serial port, but neither seems to work via this tool.

And through the script with commands like these: https://www.millisecond.com/support/docs/v5/html/howto/howtosendport.htm

See my sample Inquisit script below

Neither results in the m-pod lighting up. The m-pod documentation (https://cedrus.com/support/xid/mpod_commands.htm) says that I need to use the command "aq" to tell the host (RB-844) to "stand aside and let the computer communicate directly with m-pod." There is also documentation saying I should be communicating w/ RB-844 and not m-pod with "mh" and "mp" commands.

These commands are all python/C++ commands to communicate with the cedrus hardware.
I don't have experience with python or C++, but it looks like I need to somehow get those commands through to the hardware via Inquisit.
I'm not sure how to do this in Inquisit's task software (or if it can be done)

Note: I have downloaded Xidon to attempt to map the m-pod/RB system. I'm not completely clear on what the usb numbering system means in terms of what I command from Inquisit to get a particular DC input to deflect.

So in summary, here is my main question with sub-questions: What do I write in my Inquisit code to result in the m-pod sending a signal to the EEG?

Is this even possible through Inquisit?
Am I using a parallel port or a serial port with this setup?
Is there something I need to do through Xidon?
What does the Xidon mapping really mean?

Below is a sample Inquisit script in which I attempt to send an event marker. All I've done here is added a trial to the basic RB response test script so that it attempts to send one bit first.

<defaults>
/ inputdevice = XID
/ minimumversion = "4.0.3.0"
</defaults>

<xid responsepad>
/ product = responsepad
</xid>

<values>
/ response = 0
</values>

<data>
/ columns = [response latency]
</data>

<expt>
/ blocks = [1=test]
</expt>

<block test>
/ trials = [1 = sendonebit; 2-20=test]
</block>

<port on>
/ items = ("00000001")
/ port = XID
</port>
<text word>
/ items = ("Send One Bit")
</text>
<trial sendonebit>
/ trialduration = 2000
/ posttrialpause = 2000
/ stimulustimes = [0 = word, on]
/ validresponse = (112)
/ correctresponse = (112)
</trial>

<text responsefeedback>
/ items = ("Response: <% trial.test.response %>")
/ position = (50%, 50%)
</text>

<text lastevent>
/ items = ("Last Event: <% xid.responsepad.lastevent %>")
/ position = (15%, 70%)
</text>

<text lasteventport>
/ items = ("Port: <% xid.responsepad.lasteventport %>")
/ position = (30%, 70%)
</text>

<text lasteventaction>
/ items = ("Action: <% xid.responsepad.lasteventaction %>")
/ position = (50%, 70%)
</text>

<text lasteventbutton>
/ items = ("Button: <% xid.responsepad.lasteventbutton %>")
/ position = (70%, 70%)
</text>

<text lastlatency>
/ items = ("Latency: <% xid.responsepad.lastlatency %>")
/ position = (85%, 70%)
</text>

<trial test>
/ stimulustimes = [1=responsefeedback,lastevent,lasteventport,lasteventaction,lasteventbutton,lastlatency]
/ validresponse = (anyresponse)
</trial>

Millisecond Forums » Millisecond Forums » Inquisit 5 » Using Cedrus RB-844 and Cedrus m-pod w/ Inquisit 5 for task synchronization to EEG machine

Using Cedrus RB-844 and Cedrus m-pod w/ Inquisit 5 for task synchronization to EEG machine