Millisecond Forums » Millisecond Forums » Inquisit 6 » How to set up EEG triggers for Cyberball task．

How to set up EEG triggers for Cyberball task．

S.T — Tue, 23 Jul 2024 08:09:30 GMT

Dear all,
Hello,

I hope this message finds you well.
I have a question about the EEG triggers.
I’m creating a Cyberball task for use in ERP experiment.

The task consists of 4 players (1 participant and 3 non-participants).
I want to create two main types of Triggers.
⓵When each player throws a pass
➁When a participant (P2) is choosing who to throw a pass to.

I am currently struggling with ⓵.
In ⓵, I want to change the type of trigger depending on who throws the pass and to whom.
(For example, "P1 (or P4) threw a pass to P3" is one type.)

Therefore, I coded the following, but it does not work.

<trial npctrial>
/ ontrialbegin = [
    values.received_from = values.ball_at;
    values.ball_at = values.throw_to;
    if (values.ball_at == 2) {
        values.player2received += 1;
    };
    expressions.set_offsets;

    values.player1state = (values.ball_at == 1) + 1;
    values.player2state = (values.ball_at == 2) + 1;
    values.player3state = (values.ball_at == 3) + 1;
    values.player4state = (values.ball_at == 4) + 1;
    values.player5state = (values.ball_at == 5) + 1;
    values.player6state = (values.ball_at == 6) + 1;
    values.player7state = (values.ball_at == 7) + 1;
    values.player8state = (values.ball_at == 8) + 1;
    values.player9state = (values.ball_at == 9) + 1;

    values.throw_to = list.throwschedule.nextvalue;
    values.delay = list.delayschedule.nextvalue;
    if (values.throw_to == 0){
    values.throw_to = list.npcs.nextindex;
    values.delay = round(rand(1, 4)) * 1000;
    };
    while (values.throw_to == values.ball_at){
        values.deprecated +=1;
        values.throw_to = list.throwschedule.nextvalue;
        values.delay = list.delayschedule.nextvalue;
    };
]

/ ontrialend = [
    values.realizedThrowSchedule = concat(values.realizedThrowSchedule, values.throw_to);
    values.throwcount += 1;
    if (values.ball_at == 2) {
        values.player2thrown += 1;
    };
    if (values.ball_at == 1) {
        values.player1thrown += 1;
    };
    if (values.ball_at == 3) {
        values.player3thrown += 1;
    };
    if (values.ball_at ==4) {
        values.player4thrown += 1;
    };

    if (values.ball_at == 1 && values.throw_to == 3) {
      port.p1p4top3(values.latncy);
        port.allbitstolow(values.latency+50);
    };
    if (values.ball_at == 1 && values.throw_to == 4) {
      port.p1p4top1p4(values.latncy);
        port.allbitstolow(values.latency+50);
    };
    if (values.ball_at == 3 && values.throw_to == 1) {
      port.p3top1p4(values.latncy);
        port.allbitstolow(values.latency+50);
    };
    if (values.ball_at == 3 && values.throw_to == 4) {
      port.p3top1p4(values.latncy);
        port.allbitstolow(values.latency+50);
    };
    if (values.ball_at == 4 && values.throw_to == 1) {
      port.p1p4top1p4(values.latncy);
        port.allbitstolow(values.latency+50);
    };
    if (values.ball_at == 4 && values.throw_to == 3) {
      port.p1p4top3(values.latncy);
        port.allbitstolow(values.latency+50);
    };
]

/ stimulusframes = [1=clearscreen, player1, player2, player3, player4, player5, player6, player7, player8, player9,
    player1label, player2label, player3label, player4label, player5label, player6label, player7label, player8label, player9label,
    player1avatar, player2avatar, player3avatar, player4avatar, player5avatar, player6avatar, player7avatar, player8avatar, player9avatar,
    stats2, stats1, stats3, stats4]

/ inputdevice = keyboard
/ showmousecursor = false
/ validresponse = (0)
/ trialduration = values.delay
/ branch = [
    return trial.throw;
]
</trial>

// handles the human player
<trial choicetime>
/ ontrialbegin = [
    values.received_from = values.ball_at;
    expressions.set_offsets;

    values.player2received += 1;

    values.player1state = 1;
    //catch
    values.player2state = 2;
    values.player3state = 1;
    values.player4state = 1;
    values.player5state = 1;
    values.player6state = 1;
    values.player7state = 1;
    values.player8state = 1;
    values.player9state = 1;

    values.ball_at = 2;
    values.throw_to = list.throwschedule.nextvalue;
    values.delay = list.delayschedule.nextvalue;

]
/ trialduration = 3000
/ stimulusframes = [1=clearscreen, player1, player2, player3, player4, player5, player6, player7, player8, player9,
    player1label, player2label, player3label, player4label, player5label, player6label, player7label, player8label, player9label,
    player1avatar, player2avatar, player3avatar, player4avatar, player5avatar, player6avatar, player7avatar, player8avatar, player9avatar,
    stats2, stats1, stats3, stats4, choicetime]
/ inputdevice = keyboard
/ branch = [
    return trial.player2;
]
</trial>

<trial player2>
/ ontrialbegin = [
    values.received_from = values.ball_at;
    expressions.set_offsets;

    values.player2received += 1;

    values.player1state = 1;
    //catch
    values.player2state = 2;
    values.player3state = 1;
    values.player4state = 1;
    values.player5state = 1;
    values.player6state = 1;
    values.player7state = 1;
    values.player8state = 1;
    values.player9state = 1;

    values.ball_at = 2;
    values.throw_to = list.throwschedule.nextvalue;
    values.delay = list.delayschedule.nextvalue;

]

/ ontrialend = [
    values.throw_to = substring(trial.player2.response, length(trial.player2.response)-1, 1);
    values.realizedThrowSchedule = concat(values.realizedThrowSchedule, values.throw_to);
    values.player2thrown += 1;
    values.throwcount += 1;
    if (trial.player2.response == 79) {
      port.p2top1p4(values.latncy);
        port.allbitstolow(values.latency+50);
    };
    if (trial.player2.response == 81) {
      port.p2top3(values.latncy);
        port.allbitstolow(values.latency+50);
    };
    if (trial.player2.response == 80) {
      port.p2top1p4(values.latncy);
        port.allbitstolow(values.latency+50);
    };
]

/ stimulusframes = [1=clearscreen, player1, player2, player3, player4, player5, player6, player7, player8, player9,
    player1label, player2label, player3label, player4label, player5label, player6label, player7label, player8label, player9label,
    player1avatar, player2avatar, player3avatar, player4avatar, player5avatar, player6avatar, player7avatar, player8avatar, player9avatar,
    stats2, stats1, stats3, stats4]

/ validresponse = ("1", "3", "2", player5, player6, player7, player8, player9)
/ responsemessage = ("1", player1click, 100)
/ responsemessage = ("3", player3click, 100)
/ responsemessage = ("2", player4click, 100)
/ responsemessage = (player5, player5click, 100)
/ responsemessage = (player6, player6click, 100)
/ responsemessage = (player7, player7click, 100)
/ responsemessage = (player8, player8click, 100)
/ responsemessage = (player9, player9click, 100)
/ inputdevice = keyboard
/ branch = [
if (trial.player2.response == 79) {
      values.throw_to = 1; // use assignment operator, separate statements properly
   return trial.throw;
    };
]
/ branch = [
if (trial.player2.response == 81) {
        values.throw_to = 3; // use assignment operator, separate statements properly
   return trial.throw;
    };
]
/ branch = [
if (trial.player2.response == 80) {
        values.throw_to = 4; // use assignment operator, separate statements properly
   return trial.throw;
    };
]
</trial>

<port p2top1p4>
/ items = ("10010010")
/ port = LPT1
/ subport = data
</port>

<port p3toP1P4>
/ items = ("10010100")
/ port = LPT1
/ subport = data
</port>

<port p2top3>
/ items = ("01000010")
/ port = LPT1
/ subport = data
</port>

<port p3top2>
/ items = ("00100100")
/ port = LPT1
/ subport = data
</port>

<port p1p4top1p4>
/ items = ("10011001")
/ port = LPT1
/ subport = data
</port>

<port p1p4top2>
/ items = ("00101001")
/ port = LPT1
/ subport = data
</port>

<port p1p4top3>
/ items = ("01001001")
/ port = LPT1
/ subport = data
</port>

<port choicetime>
/ items = ("11111111")
/ port = LPT1
/ subport = data
</port>

<port allbitstolow>
/ items = ("00000000")
/ port = LPT1
/ subport = data
</port>

Does anyone know why and how to resolve this?
Thank you so much!

Best,
S.T

RE: How to set up EEG triggers for Cyberball task．

S.T — Tue, 23 Jul 2024 08:09:30 GMT

+x[quote]

[b]Dave - 7/22/2024[/b]

[/quote]

Dear Dave,

OK, I understand.
Thank you for your reply.

Best,
S.T

RE: How to set up EEG triggers for Cyberball task．

Dave — Mon, 22 Jul 2024 13:26:00 GMT

+x[quote]

[b]S.T - 7/22/2024[/b]
+x[quote]

[b]Dave - 7/22/2024[/b]

[/quote]

Dear Dave,

Thanks for the reply.
I understand.

Is there a way in Inquisit to operate the trigger signal with USB-DAQ?

Thank you.
Best,
S.T
[/quote]

No. Either get a suitable parallel port add-on card that provides a true (i.e. fully functional) LPT interface, or -- if your EEG supports it -- send your TTL tirggers via a serial (COM) interface. USB to serial adapters should generally work fine

RE: How to set up EEG triggers for Cyberball task．

S.T — Mon, 22 Jul 2024 13:07:03 GMT

+x[quote]

[b]Dave - 7/22/2024[/b]

[/quote]

Dear Dave,

Thanks for the reply.
I understand.

Is there a way in Inquisit to operate the trigger signal with USB-DAQ?

Thank you.
Best,
S.T

RE: How to set up EEG triggers for Cyberball task．

Dave — Mon, 22 Jul 2024 11:11:46 GMT

+x[quote]

[b]S.T - 7/22/2024[/b]
+x[quote]

[b]Dave - 7/17/2024[/b]

[/quote]

Dear Dave,

I appreciate all the advice.

I tried to configure the LPT port using a USB parallel conversion cable.
The USB cable I am currently using is the “Star Tech.com USB CABLE ICUSB1284D25”.

I have installed the specified driver and it seems to be working fine.
However, I still get the error “Parallel port 1 not found on this machine”.
Perhaps it is not recognized as LPT1.

How are people solving this in their experiments with trigger signals?
Please tell me how to solve this problem.

Thank you.

Best,
S.T
[/quote]

Most USB-to-parallel cables won't work. The drviers don't implement full parallel port functionality, only a minimum subset sufficient to drive legacy printers. I can't say anything about your particular adapter cable, you should contact the vendor about that.

RE: How to set up EEG triggers for Cyberball task．

S.T — Mon, 22 Jul 2024 08:12:20 GMT

+x[quote]

[b]Dave - 7/17/2024[/b]

[/quote]

Dear Dave,

I appreciate all the advice.

I tried to configure the LPT port using a USB parallel conversion cable.
The USB cable I am currently using is the “Star Tech.com USB CABLE ICUSB1284D25”.

I have installed the specified driver and it seems to be working fine.
However, I still get the error “Parallel port 1 not found on this machine”.
Perhaps it is not recognized as LPT1.

How are people solving this in their experiments with trigger signals?
Please tell me how to solve this problem.

Thank you.

Best,
S.T

RE: How to set up EEG triggers for Cyberball task．

S.T — Wed, 17 Jul 2024 16:16:08 GMT

+x[quote]

[b]Dave - 7/17/2024[/b]

[/quote]

Dear Dave,

Thank you for your reply.
I had a wrong understanding.

Thank you for correcting me and even providing the correct code example.
In order to generate the trigger signal, I have to create it exclusively.

Thank you very much, I really appreciate your help!
I will fix the code and test it to see if it works as soon as I can.

Best,
S.T

RE: How to set up EEG triggers for Cyberball task．

Dave — Wed, 17 Jul 2024 13:13:20 GMT

+x[quote]

[b]S.T - 7/17/2024[/b]
+x[quote]

[b]Dave - 7/15/2024[/b]

[/quote]

Dear Dave,

Thank you for your reply.
I see, so it means I have to code the following, for example.
/ ontrialend = [
if (values.ball_at == 1 && values.throw_to == 3) trial.npctrial.insertstimulustime(port.p1p4top3, (values.latncy));
if (values.ball_at == 1 && values.throw_to == 3) trial.npctrial.insertstimulustime(port.allbitstolow, (values.latncy+50));
]

Your advices are always very clear and helpful.
Thank you so much for all your help!
[/quote]

No, I would have <trial throw> send the triggers, i.e. "display" the applicable <port> stimulus, as I wrote in my previous response.

So, something like

[code]<trial throw>
/ ontrialbegin = [
    trial.throw.resetstimulusframes();
    trial.throw.insertstimulustime(port.allbitstolow, 50);
    if (values.ball_at == 2) { // Player 2 has the ball
        if (values.throw_to == 1) { // throws to NPC1
            trial.throw.insertstimulustime(port.2to1, 0);
        } else if (values.throw_to == 3) { // throws to NPC3
            trial.throw.insertstimulustime(port.2to3, 0);
        } else if (values.throw_to == 4) { // throws to NPC4
            trial.throw.insertstimulustime(port.2to4, 0);
        };
    } else if (values.ball_at == 1) { // NPC1 has the ball
        if (values.throw_to == 2) {
            trial.throw.insertstimulustime(port.1to2, 0); // throws to Player 2
        } else if (values.throw_to == 3) {
            trial.throw.insertstimulustime(port.1to3, 0); // throws to NPC3
        } else if (values.throw_t0 == 4) {
            trial.throw.insertstimulustime(port.1to4, 0); // throws to NPC4
        };
    } else if (...) {
        ....
    };
...
]
...
</trial>[/code]

RE: How to set up EEG triggers for Cyberball task．

S.T — Wed, 17 Jul 2024 02:44:25 GMT

+x[quote]

[b]Dave - 7/15/2024[/b]

[/quote]

Dear Dave,

Thank you for your reply.
I see, so it means I have to code the following, for example.
/ ontrialend = [
if (values.ball_at == 1 && values.throw_to == 3) trial.npctrial.insertstimulustime(port.p1p4top3, (values.latncy));
if (values.ball_at == 1 && values.throw_to == 3) trial.npctrial.insertstimulustime(port.allbitstolow, (values.latncy+50));
]

Your advices are always very clear and helpful.
Thank you so much for all your help!

RE: How to set up EEG triggers for Cyberball task．

Dave — Mon, 15 Jul 2024 12:16:30 GMT

+x[quote]

[b]S.T - 7/13/2024[/b]
Dear all,
Hello,

I hope this message finds you well.
I have a question about the EEG triggers.
I’m creating a Cyberball task for use in ERP experiment.

The task consists of 4 players (1 participant and 3 non-participants).
I want to create two main types of Triggers.
⓵When each player throws a pass
➁When a participant (P2) is choosing who to throw a pass to.

I am currently struggling with ⓵.
In ⓵, I want to change the type of trigger depending on who throws the pass and to whom.
(For example, "P1 (or P4) threw a pass to P3" is one type.)

Therefore, I coded the following, but it does not work.

<trial npctrial>
/ ontrialbegin = [
    values.received_from = values.ball_at;
    values.ball_at = values.throw_to;
    if (values.ball_at == 2) {
        values.player2received += 1;
    };
    expressions.set_offsets;

    values.player1state = (values.ball_at == 1) + 1;
    values.player2state = (values.ball_at == 2) + 1;
    values.player3state = (values.ball_at == 3) + 1;
    values.player4state = (values.ball_at == 4) + 1;
    values.player5state = (values.ball_at == 5) + 1;
    values.player6state = (values.ball_at == 6) + 1;
    values.player7state = (values.ball_at == 7) + 1;
    values.player8state = (values.ball_at == 8) + 1;
    values.player9state = (values.ball_at == 9) + 1;

    values.throw_to = list.throwschedule.nextvalue;
    values.delay = list.delayschedule.nextvalue;
    if (values.throw_to == 0){
    values.throw_to = list.npcs.nextindex;
    values.delay = round(rand(1, 4)) * 1000;
    };
    while (values.throw_to == values.ball_at){
        values.deprecated +=1;
        values.throw_to = list.throwschedule.nextvalue;
        values.delay = list.delayschedule.nextvalue;
    };
]

/ ontrialend = [
    values.realizedThrowSchedule = concat(values.realizedThrowSchedule, values.throw_to);
    values.throwcount += 1;
    if (values.ball_at == 2) {
        values.player2thrown += 1;
    };
    if (values.ball_at == 1) {
        values.player1thrown += 1;
    };
    if (values.ball_at == 3) {
        values.player3thrown += 1;
    };
    if (values.ball_at ==4) {
        values.player4thrown += 1;
    };

    if (values.ball_at == 1 && values.throw_to == 3) {
      port.p1p4top3(values.latncy);
        port.allbitstolow(values.latency+50);
    };
    if (values.ball_at == 1 && values.throw_to == 4) {
      port.p1p4top1p4(values.latncy);
        port.allbitstolow(values.latency+50);
    };
    if (values.ball_at == 3 && values.throw_to == 1) {
      port.p3top1p4(values.latncy);
        port.allbitstolow(values.latency+50);
    };
    if (values.ball_at == 3 && values.throw_to == 4) {
      port.p3top1p4(values.latncy);
        port.allbitstolow(values.latency+50);
    };
    if (values.ball_at == 4 && values.throw_to == 1) {
      port.p1p4top1p4(values.latncy);
        port.allbitstolow(values.latency+50);
    };
    if (values.ball_at == 4 && values.throw_to == 3) {
      port.p1p4top3(values.latncy);
        port.allbitstolow(values.latency+50);
    };
]

/ stimulusframes = [1=clearscreen, player1, player2, player3, player4, player5, player6, player7, player8, player9,
    player1label, player2label, player3label, player4label, player5label, player6label, player7label, player8label, player9label,
    player1avatar, player2avatar, player3avatar, player4avatar, player5avatar, player6avatar, player7avatar, player8avatar, player9avatar,
    stats2, stats1, stats3, stats4]

/ inputdevice = keyboard
/ showmousecursor = false
/ validresponse = (0)
/ trialduration = values.delay
/ branch = [
    return trial.throw;
]
</trial>

// handles the human player
<trial choicetime>
/ ontrialbegin = [
    values.received_from = values.ball_at;
    expressions.set_offsets;

    values.player2received += 1;

    values.player1state = 1;
    //catch
    values.player2state = 2;
    values.player3state = 1;
    values.player4state = 1;
    values.player5state = 1;
    values.player6state = 1;
    values.player7state = 1;
    values.player8state = 1;
    values.player9state = 1;

    values.ball_at = 2;
    values.throw_to = list.throwschedule.nextvalue;
    values.delay = list.delayschedule.nextvalue;

]
/ trialduration = 3000
/ stimulusframes = [1=clearscreen, player1, player2, player3, player4, player5, player6, player7, player8, player9,
    player1label, player2label, player3label, player4label, player5label, player6label, player7label, player8label, player9label,
    player1avatar, player2avatar, player3avatar, player4avatar, player5avatar, player6avatar, player7avatar, player8avatar, player9avatar,
    stats2, stats1, stats3, stats4, choicetime]
/ inputdevice = keyboard
/ branch = [
    return trial.player2;
]
</trial>

<trial player2>
/ ontrialbegin = [
    values.received_from = values.ball_at;
    expressions.set_offsets;

    values.player2received += 1;

    values.player1state = 1;
    //catch
    values.player2state = 2;
    values.player3state = 1;
    values.player4state = 1;
    values.player5state = 1;
    values.player6state = 1;
    values.player7state = 1;
    values.player8state = 1;
    values.player9state = 1;

    values.ball_at = 2;
    values.throw_to = list.throwschedule.nextvalue;
    values.delay = list.delayschedule.nextvalue;

]

/ ontrialend = [
    values.throw_to = substring(trial.player2.response, length(trial.player2.response)-1, 1);
    values.realizedThrowSchedule = concat(values.realizedThrowSchedule, values.throw_to);
    values.player2thrown += 1;
    values.throwcount += 1;
    if (trial.player2.response == 79) {
      port.p2top1p4(values.latncy);
        port.allbitstolow(values.latency+50);
    };
    if (trial.player2.response == 81) {
      port.p2top3(values.latncy);
        port.allbitstolow(values.latency+50);
    };
    if (trial.player2.response == 80) {
      port.p2top1p4(values.latncy);
        port.allbitstolow(values.latency+50);
    };
]

/ stimulusframes = [1=clearscreen, player1, player2, player3, player4, player5, player6, player7, player8, player9,
    player1label, player2label, player3label, player4label, player5label, player6label, player7label, player8label, player9label,
    player1avatar, player2avatar, player3avatar, player4avatar, player5avatar, player6avatar, player7avatar, player8avatar, player9avatar,
    stats2, stats1, stats3, stats4]

/ validresponse = ("1", "3", "2", player5, player6, player7, player8, player9)
/ responsemessage = ("1", player1click, 100)
/ responsemessage = ("3", player3click, 100)
/ responsemessage = ("2", player4click, 100)
/ responsemessage = (player5, player5click, 100)
/ responsemessage = (player6, player6click, 100)
/ responsemessage = (player7, player7click, 100)
/ responsemessage = (player8, player8click, 100)
/ responsemessage = (player9, player9click, 100)
/ inputdevice = keyboard
/ branch = [
if (trial.player2.response == 79) {
      values.throw_to = 1; // use assignment operator, separate statements properly
   return trial.throw;
    };
]
/ branch = [
if (trial.player2.response == 81) {
        values.throw_to = 3; // use assignment operator, separate statements properly
   return trial.throw;
    };
]
/ branch = [
if (trial.player2.response == 80) {
        values.throw_to = 4; // use assignment operator, separate statements properly
   return trial.throw;
    };
]
</trial>

<port p2top1p4>
/ items = ("10010010")
/ port = LPT1
/ subport = data
</port>

<port p3toP1P4>
/ items = ("10010100")
/ port = LPT1
/ subport = data
</port>

<port p2top3>
/ items = ("01000010")
/ port = LPT1
/ subport = data
</port>

<port p3top2>
/ items = ("00100100")
/ port = LPT1
/ subport = data
</port>

<port p1p4top1p4>
/ items = ("10011001")
/ port = LPT1
/ subport = data
</port>

<port p1p4top2>
/ items = ("00101001")
/ port = LPT1
/ subport = data
</port>

<port p1p4top3>
/ items = ("01001001")
/ port = LPT1
/ subport = data
</port>

<port choicetime>
/ items = ("11111111")
/ port = LPT1
/ subport = data
</port>

<port allbitstolow>
/ items = ("00000000")
/ port = LPT1
/ subport = data
</port>

Does anyone know why and how to resolve this?
Thank you so much!

Best,
S.T
[/quote]

<port> elments are stimulus elements just like any other (<text>, <picture>, etc.). You need to have a <trial> element actually "display" the <port> element you want to use, either by inserting it into the trial's stimulus presentation sequence (cf. insertstimulustime() function).
Things like

if (trial.player2.response == 79) {
port.p2top1p4(values.latncy);
port.allbitstolow(values.latency+50);
};

are not valid syntax and will not do anything useful.

In the script, <trial throw> implements the ball-throwing animation (from -> to). That is where your logic should go, i.e. /ontrialbegin in <trial throw>, use /insertstimulustime() to have the trial display the correct <port> stimulus on the basis of values.ball_at and values.throw_to.