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Aleya
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Group: Forum Members
Posts: 15,
Visits: 30
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Sorry for being unclear. In the example used before the fixation marker is always 0, independent of the trial or the stimulus pair shown:
<trial emoneu>
/ ontrialbegin = [values.marker = (picture.emoleft.currentindex*100) + picture.neuright.currentindex;]
/ ontrialbegin = [port.marker.setitem(values.marker, 1);]
/ stimulustimes = [0 = fixation; 2001 = emoleft, neuright, marker]
/ posttrialpause = (picture.fixation.item)
/ inputdevice = eyetracker
/ recorddata = true
/ ontrialend = [values.image_emo = (picture.emoleft.currentitem); values.image_neu = picture.neuright.currentitem]
/ ontrialend = [values.iti = trial.iti.timeout]
/ timeout = values.trialduration
</trial>
I would like to use the fixation cross as a baseline for the eye movement measured and to do so I have to be able to differentiate the fixation crosses of the different Trials in the output file. Or am I missing some general hint?
Concerning the repetitions: I have 60 items (30 of each category) and have indicated the poolsize accordingly, have I not?
<list trialselector>
/ items = (trial.emoneu, trial.neuemo)
/ itemprobabilities = (.50, .50)
/ poolsize = 60
/ replace = false
</list>
Sorry, if my questions are a bit trivial and thanks for your help!
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Dave
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Group: Administrators
Posts: 13K,
Visits: 108K
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+x+x+xHi, I've tried to find a solution by reading previous comments on this topic, but cannot seem to send useful markers for the onset of my stimuli. It is a simple experiment, in which two pictures (one neutral and one emotional) are shown simultaneously on each side of a fixation cross for only 200ms. Before the onset of the stimuli I want a recorded fixation cross time of 300ms. ITI are fixation crosses as well fr 3000-6000ms. According to an example script on the millisecond homepage, I tried the following: <values> / trialduration = 2200 / marker = 0 / stimulusonset = 0 / image_neu = "" / image_emo = "" </values> <port marker> / items = (0) / port = eyetracker / erase = false </port> I set up trials for each version emoneu (emotional left and neutral right) and neuemo after defining the pictures and their positions:<trial emoneu> / ontrialbegin = [values.marker = (picture.emoleft.currentindex*100) + picture.neuright.currentindex;] / ontrialbegin = [port.marker.setitem(values.marker, 1);] / stimulustimes = [0 = fixation; 2001 = emoleft, neuright, marker] / posttrialpause = (picture.fixation.item) / inputdevice = eyetracker / recorddata = true / ontrialend = [values.image_emo = (picture.emoleft.currentitem); values.image_neu = picture.neuright.currentitem] / ontrialend = [values.iti = trial.iti.timeout] / timeout = values.trialduration </trial> <list trialselector> / items = (trial.emoneu, trial.neuemo) / itemprobabilities = (.50, .50) / poolsize = 60 / replace = false </list> I cannot seem to get adequate markers for the stimulus onsets. I know I set it up as a multiple digit number to indicate the current index of each picture shown for the left and the right, but they seem to be random. Also, I would like to also set markers for the fixation cross, so I have a baseline to analyze the data from. I realize that I have to set markers back to 0 if I have more than one in a single trial, but I just want to get the stimulus setting right first. I'm sorry if this question is trivial, I just don't seem to be understanding how to implement it. Thanks in advance, Aleya I set up trials for each version emoneu (emotional left and neutral right) and neuemo after defining the pictures and their positions: <trial emoneu> / ontrialbegin = [values.marker = (picture.emoleft.currentindex*100) + picture.neuright.currentindex;]/ ontrialbegin = [port.marker.setitem(values.marker, 1);] / stimulustimes = [0 = fixation; 2001 = emoleft, neuright, marker] / posttrialpause = (picture.fixation.item) / inputdevice = eyetracker / recorddata = true / ontrialend = [values.image_emo = (picture.emoleft.currentitem); values.image_neu = picture.neuright.currentitem] / ontrialend = [values.iti = trial.iti.timeout] / timeout = values.trialduration </trial> At the time you set the marker value, /ontrialbegin, the items that the trial *will* display eventually have not been selected yet. That only happens when that trial displays the two pictures. Thus, currentindex in your case will not reflect what will happen eventually during the trial later. Instead, currentindex will still reflect whatever items were selected during any *previous* trial. Change things to nextindex, and then things should work: <trial emoneu> / ontrialbegin = [values.marker = (picture.emoleft.nextindex*100) + picture.neuright.nextindex;]/ ontrialbegin = [port.marker.setitem(values.marker, 1);] / stimulustimes = [0 = fixation; 2001 = emoleft, neuright, marker] / posttrialpause = (picture.fixation.item) / inputdevice = eyetracker / recorddata = true / ontrialend = [values.image_emo = (picture.emoleft.currentitem); values.image_neu = picture.neuright.currentitem] / ontrialend = [values.iti = trial.iti.timeout] / timeout = values.trialduration </trial> Also, the way it is coded now, the stimuli seem to be repeating, even though replace is set to false. What am I not getting? > And how do I set separate markers for the duration of the fixation cross? What do you mean by this? Please give a concrete example. > Also, the way it is coded now, the stimuli seem to be repeating, even though replace is set to false. What am I not getting? When you sample from a given stimulus pool more often than it has items, then it has to repeat items eventually. I.e. once it has run out of items (sampled without replacement), the stimulus pool resets and all items become available again.
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Aleya
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Group: Forum Members
Posts: 15,
Visits: 30
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+x+xHi, I've tried to find a solution by reading previous comments on this topic, but cannot seem to send useful markers for the onset of my stimuli. It is a simple experiment, in which two pictures (one neutral and one emotional) are shown simultaneously on each side of a fixation cross for only 200ms. Before the onset of the stimuli I want a recorded fixation cross time of 300ms. ITI are fixation crosses as well fr 3000-6000ms. According to an example script on the millisecond homepage, I tried the following: <values> / trialduration = 2200 / marker = 0 / stimulusonset = 0 / image_neu = "" / image_emo = "" </values> <port marker> / items = (0) / port = eyetracker / erase = false </port> I set up trials for each version emoneu (emotional left and neutral right) and neuemo after defining the pictures and their positions:<trial emoneu> / ontrialbegin = [values.marker = (picture.emoleft.currentindex*100) + picture.neuright.currentindex;] / ontrialbegin = [port.marker.setitem(values.marker, 1);] / stimulustimes = [0 = fixation; 2001 = emoleft, neuright, marker] / posttrialpause = (picture.fixation.item) / inputdevice = eyetracker / recorddata = true / ontrialend = [values.image_emo = (picture.emoleft.currentitem); values.image_neu = picture.neuright.currentitem] / ontrialend = [values.iti = trial.iti.timeout] / timeout = values.trialduration </trial> <list trialselector> / items = (trial.emoneu, trial.neuemo) / itemprobabilities = (.50, .50) / poolsize = 60 / replace = false </list> I cannot seem to get adequate markers for the stimulus onsets. I know I set it up as a multiple digit number to indicate the current index of each picture shown for the left and the right, but they seem to be random. Also, I would like to also set markers for the fixation cross, so I have a baseline to analyze the data from. I realize that I have to set markers back to 0 if I have more than one in a single trial, but I just want to get the stimulus setting right first. I'm sorry if this question is trivial, I just don't seem to be understanding how to implement it. Thanks in advance, Aleya I set up trials for each version emoneu (emotional left and neutral right) and neuemo after defining the pictures and their positions: <trial emoneu> / ontrialbegin = [values.marker = (picture.emoleft.currentindex*100) + picture.neuright.currentindex;]/ ontrialbegin = [port.marker.setitem(values.marker, 1);] / stimulustimes = [0 = fixation; 2001 = emoleft, neuright, marker] / posttrialpause = (picture.fixation.item) / inputdevice = eyetracker / recorddata = true / ontrialend = [values.image_emo = (picture.emoleft.currentitem); values.image_neu = picture.neuright.currentitem] / ontrialend = [values.iti = trial.iti.timeout] / timeout = values.trialduration </trial> At the time you set the marker value, /ontrialbegin, the items that the trial *will* display eventually have not been selected yet. That only happens when that trial displays the two pictures. Thus, currentindex in your case will not reflect what will happen eventually during the trial later. Instead, currentindex will still reflect whatever items were selected during any *previous* trial. Change things to nextindex, and then things should work: <trial emoneu> / ontrialbegin = [values.marker = (picture.emoleft.nextindex*100) + picture.neuright.nextindex;]/ ontrialbegin = [port.marker.setitem(values.marker, 1);] / stimulustimes = [0 = fixation; 2001 = emoleft, neuright, marker] / posttrialpause = (picture.fixation.item) / inputdevice = eyetracker / recorddata = true / ontrialend = [values.image_emo = (picture.emoleft.currentitem); values.image_neu = picture.neuright.currentitem] / ontrialend = [values.iti = trial.iti.timeout] / timeout = values.trialduration </trial> Also, the way it is coded now, the stimuli seem to be repeating, even though replace is set to false. What am I not getting?
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Aleya
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Group: Forum Members
Posts: 15,
Visits: 30
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+x+xHi, I've tried to find a solution by reading previous comments on this topic, but cannot seem to send useful markers for the onset of my stimuli. It is a simple experiment, in which two pictures (one neutral and one emotional) are shown simultaneously on each side of a fixation cross for only 200ms. Before the onset of the stimuli I want a recorded fixation cross time of 300ms. ITI are fixation crosses as well fr 3000-6000ms. According to an example script on the millisecond homepage, I tried the following: <values> / trialduration = 2200 / marker = 0 / stimulusonset = 0 / image_neu = "" / image_emo = "" </values> <port marker> / items = (0) / port = eyetracker / erase = false </port> I set up trials for each version emoneu (emotional left and neutral right) and neuemo after defining the pictures and their positions:<trial emoneu> / ontrialbegin = [values.marker = (picture.emoleft.currentindex*100) + picture.neuright.currentindex;] / ontrialbegin = [port.marker.setitem(values.marker, 1);] / stimulustimes = [0 = fixation; 2001 = emoleft, neuright, marker] / posttrialpause = (picture.fixation.item) / inputdevice = eyetracker / recorddata = true / ontrialend = [values.image_emo = (picture.emoleft.currentitem); values.image_neu = picture.neuright.currentitem] / ontrialend = [values.iti = trial.iti.timeout] / timeout = values.trialduration </trial> <list trialselector> / items = (trial.emoneu, trial.neuemo) / itemprobabilities = (.50, .50) / poolsize = 60 / replace = false </list> I cannot seem to get adequate markers for the stimulus onsets. I know I set it up as a multiple digit number to indicate the current index of each picture shown for the left and the right, but they seem to be random. Also, I would like to also set markers for the fixation cross, so I have a baseline to analyze the data from. I realize that I have to set markers back to 0 if I have more than one in a single trial, but I just want to get the stimulus setting right first. I'm sorry if this question is trivial, I just don't seem to be understanding how to implement it. Thanks in advance, Aleya I set up trials for each version emoneu (emotional left and neutral right) and neuemo after defining the pictures and their positions: <trial emoneu> / ontrialbegin = [values.marker = (picture.emoleft.currentindex*100) + picture.neuright.currentindex;]/ ontrialbegin = [port.marker.setitem(values.marker, 1);] / stimulustimes = [0 = fixation; 2001 = emoleft, neuright, marker] / posttrialpause = (picture.fixation.item) / inputdevice = eyetracker / recorddata = true / ontrialend = [values.image_emo = (picture.emoleft.currentitem); values.image_neu = picture.neuright.currentitem] / ontrialend = [values.iti = trial.iti.timeout] / timeout = values.trialduration </trial> At the time you set the marker value, /ontrialbegin, the items that the trial *will* display eventually have not been selected yet. That only happens when that trial displays the two pictures. Thus, currentindex in your case will not reflect what will happen eventually during the trial later. Instead, currentindex will still reflect whatever items were selected during any *previous* trial. Change things to nextindex, and then things should work: <trial emoneu> / ontrialbegin = [values.marker = (picture.emoleft.nextindex*100) + picture.neuright.nextindex;]/ ontrialbegin = [port.marker.setitem(values.marker, 1);] / stimulustimes = [0 = fixation; 2001 = emoleft, neuright, marker] / posttrialpause = (picture.fixation.item) / inputdevice = eyetracker / recorddata = true / ontrialend = [values.image_emo = (picture.emoleft.currentitem); values.image_neu = picture.neuright.currentitem] / ontrialend = [values.iti = trial.iti.timeout] / timeout = values.trialduration </trial> And how do I set separate markers for the duration of the fixation cross?
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Aleya
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Group: Forum Members
Posts: 15,
Visits: 30
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+x+xHi, I've tried to find a solution by reading previous comments on this topic, but cannot seem to send useful markers for the onset of my stimuli. It is a simple experiment, in which two pictures (one neutral and one emotional) are shown simultaneously on each side of a fixation cross for only 200ms. Before the onset of the stimuli I want a recorded fixation cross time of 300ms. ITI are fixation crosses as well fr 3000-6000ms. According to an example script on the millisecond homepage, I tried the following: <values> / trialduration = 2200 / marker = 0 / stimulusonset = 0 / image_neu = "" / image_emo = "" </values> <port marker> / items = (0) / port = eyetracker / erase = false </port> I set up trials for each version emoneu (emotional left and neutral right) and neuemo after defining the pictures and their positions:<trial emoneu> / ontrialbegin = [values.marker = (picture.emoleft.currentindex*100) + picture.neuright.currentindex;] / ontrialbegin = [port.marker.setitem(values.marker, 1);] / stimulustimes = [0 = fixation; 2001 = emoleft, neuright, marker] / posttrialpause = (picture.fixation.item) / inputdevice = eyetracker / recorddata = true / ontrialend = [values.image_emo = (picture.emoleft.currentitem); values.image_neu = picture.neuright.currentitem] / ontrialend = [values.iti = trial.iti.timeout] / timeout = values.trialduration </trial> <list trialselector> / items = (trial.emoneu, trial.neuemo) / itemprobabilities = (.50, .50) / poolsize = 60 / replace = false </list> I cannot seem to get adequate markers for the stimulus onsets. I know I set it up as a multiple digit number to indicate the current index of each picture shown for the left and the right, but they seem to be random. Also, I would like to also set markers for the fixation cross, so I have a baseline to analyze the data from. I realize that I have to set markers back to 0 if I have more than one in a single trial, but I just want to get the stimulus setting right first. I'm sorry if this question is trivial, I just don't seem to be understanding how to implement it. Thanks in advance, Aleya I set up trials for each version emoneu (emotional left and neutral right) and neuemo after defining the pictures and their positions: <trial emoneu> / ontrialbegin = [values.marker = (picture.emoleft.currentindex*100) + picture.neuright.currentindex;]/ ontrialbegin = [port.marker.setitem(values.marker, 1);] / stimulustimes = [0 = fixation; 2001 = emoleft, neuright, marker] / posttrialpause = (picture.fixation.item) / inputdevice = eyetracker / recorddata = true / ontrialend = [values.image_emo = (picture.emoleft.currentitem); values.image_neu = picture.neuright.currentitem] / ontrialend = [values.iti = trial.iti.timeout] / timeout = values.trialduration </trial> At the time you set the marker value, /ontrialbegin, the items that the trial *will* display eventually have not been selected yet. That only happens when that trial displays the two pictures. Thus, currentindex in your case will not reflect what will happen eventually during the trial later. Instead, currentindex will still reflect whatever items were selected during any *previous* trial. Change things to nextindex, and then things should work: <trial emoneu> / ontrialbegin = [values.marker = (picture.emoleft.nextindex*100) + picture.neuright.nextindex;]/ ontrialbegin = [port.marker.setitem(values.marker, 1);] / stimulustimes = [0 = fixation; 2001 = emoleft, neuright, marker] / posttrialpause = (picture.fixation.item) / inputdevice = eyetracker / recorddata = true / ontrialend = [values.image_emo = (picture.emoleft.currentitem); values.image_neu = picture.neuright.currentitem] / ontrialend = [values.iti = trial.iti.timeout] / timeout = values.trialduration </trial> Wonderful Dave, thank you very much!
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Dave
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Group: Administrators
Posts: 13K,
Visits: 108K
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+xHi, I've tried to find a solution by reading previous comments on this topic, but cannot seem to send useful markers for the onset of my stimuli. It is a simple experiment, in which two pictures (one neutral and one emotional) are shown simultaneously on each side of a fixation cross for only 200ms. Before the onset of the stimuli I want a recorded fixation cross time of 300ms. ITI are fixation crosses as well fr 3000-6000ms. According to an example script on the millisecond homepage, I tried the following: <values> / trialduration = 2200 / marker = 0 / stimulusonset = 0 / image_neu = "" / image_emo = "" </values> <port marker> / items = (0) / port = eyetracker / erase = false </port> I set up trials for each version emoneu (emotional left and neutral right) and neuemo after defining the pictures and their positions:<trial emoneu> / ontrialbegin = [values.marker = (picture.emoleft.currentindex*100) + picture.neuright.currentindex;] / ontrialbegin = [port.marker.setitem(values.marker, 1);] / stimulustimes = [0 = fixation; 2001 = emoleft, neuright, marker] / posttrialpause = (picture.fixation.item) / inputdevice = eyetracker / recorddata = true / ontrialend = [values.image_emo = (picture.emoleft.currentitem); values.image_neu = picture.neuright.currentitem] / ontrialend = [values.iti = trial.iti.timeout] / timeout = values.trialduration </trial> <list trialselector> / items = (trial.emoneu, trial.neuemo) / itemprobabilities = (.50, .50) / poolsize = 60 / replace = false </list> I cannot seem to get adequate markers for the stimulus onsets. I know I set it up as a multiple digit number to indicate the current index of each picture shown for the left and the right, but they seem to be random. Also, I would like to also set markers for the fixation cross, so I have a baseline to analyze the data from. I realize that I have to set markers back to 0 if I have more than one in a single trial, but I just want to get the stimulus setting right first. I'm sorry if this question is trivial, I just don't seem to be understanding how to implement it. Thanks in advance, Aleya I set up trials for each version emoneu (emotional left and neutral right) and neuemo after defining the pictures and their positions: <trial emoneu> / ontrialbegin = [values.marker = (picture.emoleft.currentindex*100) + picture.neuright.currentindex;]/ ontrialbegin = [port.marker.setitem(values.marker, 1);] / stimulustimes = [0 = fixation; 2001 = emoleft, neuright, marker] / posttrialpause = (picture.fixation.item) / inputdevice = eyetracker / recorddata = true / ontrialend = [values.image_emo = (picture.emoleft.currentitem); values.image_neu = picture.neuright.currentitem] / ontrialend = [values.iti = trial.iti.timeout] / timeout = values.trialduration </trial> At the time you set the marker value, /ontrialbegin, the items that the trial *will* display eventually have not been selected yet. That only happens when that trial displays the two pictures. Thus, currentindex in your case will not reflect what will happen eventually during the trial later. Instead, currentindex will still reflect whatever items were selected during any *previous* trial. Change things to nextindex, and then things should work: <trial emoneu> / ontrialbegin = [values.marker = (picture.emoleft.nextindex*100) + picture.neuright.nextindex;]/ ontrialbegin = [port.marker.setitem(values.marker, 1);] / stimulustimes = [0 = fixation; 2001 = emoleft, neuright, marker] / posttrialpause = (picture.fixation.item) / inputdevice = eyetracker / recorddata = true / ontrialend = [values.image_emo = (picture.emoleft.currentitem); values.image_neu = picture.neuright.currentitem] / ontrialend = [values.iti = trial.iti.timeout] / timeout = values.trialduration </trial>
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Aleya
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Group: Forum Members
Posts: 15,
Visits: 30
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Hi, I've tried to find a solution by reading previous comments on this topic, but cannot seem to send useful markers for the onset of my stimuli. It is a simple experiment, in which two pictures (one neutral and one emotional) are shown simultaneously on each side of a fixation cross for only 200ms. Before the onset of the stimuli I want a recorded fixation cross time of 300ms. ITI are fixation crosses as well fr 3000-6000ms. According to an example script on the millisecond homepage, I tried the following: <values> / trialduration = 2200 / marker = 0 / stimulusonset = 0 / image_neu = "" / image_emo = "" </values> <port marker> / items = (0) / port = eyetracker / erase = false </port> I set up trials for each version emoneu (emotional left and neutral right) and neuemo after defining the pictures and their positions:<trial emoneu> / ontrialbegin = [values.marker = (picture.emoleft.currentindex*100) + picture.neuright.currentindex;] / ontrialbegin = [port.marker.setitem(values.marker, 1);] / stimulustimes = [0 = fixation; 2001 = emoleft, neuright, marker] / posttrialpause = (picture.fixation.item) / inputdevice = eyetracker / recorddata = true / ontrialend = [values.image_emo = (picture.emoleft.currentitem); values.image_neu = picture.neuright.currentitem] / ontrialend = [values.iti = trial.iti.timeout] / timeout = values.trialduration </trial> <list trialselector> / items = (trial.emoneu, trial.neuemo) / itemprobabilities = (.50, .50) / poolsize = 60 / replace = false </list> I cannot seem to get adequate markers for the stimulus onsets. I know I set it up as a multiple digit number to indicate the current index of each picture shown for the left and the right, but they seem to be random. Also, I would like to also set markers for the fixation cross, so I have a baseline to analyze the data from. I realize that I have to set markers back to 0 if I have more than one in a single trial, but I just want to get the stimulus setting right first. I'm sorry if this question is trivial, I just don't seem to be understanding how to implement it. Thanks in advance, Aleya
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