By a.finlay - 6/7/2022
I am creating an experiment requiring the following layout:
Where trial 1 will lead to one of the trials 2-5 depending on the participant’s choice
And trial 2 will lead to one of the survey pages 1-8 depending on the participant’s choice and so on.
I have used branches at the trial level, for example trial 1…
<trial choice>
/ stimulusframes = [5=frontpage, logo, coffee, hotchoc, tea, iced]
/ inputdevice = mouse
/ validresponse = (coffee, hotchoc, tea, iced)
/ branch = [
if (trial.choice.response==picture.coffee) trial.choicecoffee]
/ branch = [
if (trial.choice.response==picture.hotchoc) trial.choice.hotchoc]
/ branch = [
if (trial.choice.response==picture.tea) trial.choice.tea]
/ branch = [
if (trial.choice.response==picture.iced) trial.choiceiced]
</trial>
… and put all of these trials into a block. When I do this, all trials run in the order they are presented rather than following the specified branches.
I have tried putting all trials in separate blocks and using branches at a block level but that still hasn’t worked.
Any help would be much appreciated!
Thanks 😊
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By Dave - 6/7/2022
+xI am creating an experiment requiring the following layout: Where trial 1 will lead to one of the trials 2-5 depending on the participant’s choice And trial 2 will lead to one of the survey pages 1-8 depending on the participant’s choice and so on. I have used branches at the trial level, for example trial 1… <trial choice> / stimulusframes = [5=frontpage, logo, coffee, hotchoc, tea, iced] / inputdevice = mouse / validresponse = (coffee, hotchoc, tea, iced) / branch = [ if (trial.choice.response==picture.coffee) trial.choicecoffee] / branch = [ if (trial.choice.response==picture.hotchoc) trial.choice.hotchoc] / branch = [ if (trial.choice.response==picture.tea) trial.choice.tea] / branch = [ if (trial.choice.response==picture.iced) trial.choiceiced] </trial> … and put all of these trials into a block. When I do this, all trials run in the order they are presented rather than following the specified branches. I have tried putting all trials in separate blocks and using branches at a block level but that still hasn’t worked. Any help would be much appreciated! Thanks 😊
> and put all of these trials into a block.
Only <trial choice> belongs in the <block>'s /trials. Nothing else.
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By Dave - 6/7/2022
+x+xI am creating an experiment requiring the following layout: Where trial 1 will lead to one of the trials 2-5 depending on the participant’s choice And trial 2 will lead to one of the survey pages 1-8 depending on the participant’s choice and so on. I have used branches at the trial level, for example trial 1… <trial choice> / stimulusframes = [5=frontpage, logo, coffee, hotchoc, tea, iced] / inputdevice = mouse / validresponse = (coffee, hotchoc, tea, iced) / branch = [ if (trial.choice.response==picture.coffee) trial.choicecoffee] / branch = [ if (trial.choice.response==picture.hotchoc) trial.choice.hotchoc] / branch = [ if (trial.choice.response==picture.tea) trial.choice.tea] / branch = [ if (trial.choice.response==picture.iced) trial.choiceiced] </trial> … and put all of these trials into a block. When I do this, all trials run in the order they are presented rather than following the specified branches. I have tried putting all trials in separate blocks and using branches at a block level but that still hasn’t worked. Any help would be much appreciated! Thanks 😊 > and put all of these trials into a block. Only <trial choice> belongs in the <block>'s /trials. Nothing else.
The basic structure is really simple and goes like this:
<defaults>
/ inputdevice = mouse
</defaults>
<block example>
/ trials = [1=choice] // run the choice trial
</block>
<trial choice>
/ stimulusframes = [1=a, b, c, pickone]
/ validresponse = (a, b, c)
/ branch = [
// go to follow-up trial based on response to the choice trial
if (trial.choice.response == "a") {
return trial.choiceA;
} else if (trial.choice.response == "b") {
return trial.choiceB;
} else if (trial.choice.response == "c") {
return trial.choiceC;
};
]
</trial>
<trial choiceA>
/ stimulusframes = [1=a1, a2, wherenext]
/ validresponse = (a1, a2)
/ branch = [
// go to follow-up surveypage based on response
if (trial.choiceA.response == "a1") {
return surveypage.a1page;
} else if (trial.choiceA.response == "a2") {
return surveypage.a2page;
};
]
</trial>
<trial choiceB>
/ stimulusframes = [1=b1, b2, wherenext]
/ validresponse = (b1, b2)
/ branch = [
// go to follow-up surveypage based on response
if (trial.choiceB.response == "b1") {
return surveypage.b1page;
} else if (trial.choiceB.response == "b2") {
return surveypage.b2page;
};
]
</trial>
<trial choiceC>
/ stimulusframes = [1=c1, c2, wherenext]
/ validresponse = (c1, c2)
/ branch = [
// go to follow-up surveypage based on response
if (trial.choiceC.response == "c1") {
return surveypage.c1page;
} else if (trial.choiceC.response == "c2") {
return surveypage.c2page;
};
]
</trial>
<surveypage a1page>
/ caption = "You've reached surveypage A1"
/ showpagenumbers = false
/ showquestionnumbers = false
</surveypage>
<surveypage a2page>
/ caption = "You've reached surveypage A2"
/ showpagenumbers = false
/ showquestionnumbers = false
</surveypage>
<surveypage b1page>
/ caption = "You've reached surveypage B1"
/ showpagenumbers = false
/ showquestionnumbers = false
</surveypage>
<surveypage b2page>
/ caption = "You've reached surveypage B2"
/ showpagenumbers = false
/ showquestionnumbers = false
</surveypage>
<surveypage c1page>
/ caption = "You've reached surveypage C1"
/ showpagenumbers = false
/ showquestionnumbers = false
</surveypage>
<surveypage C2page>
/ caption = "You've reached surveypage C2"
/ showpagenumbers = false
/ showquestionnumbers = false
</surveypage>
<text a>
/ items = ("A")
/ position = (40%, 50%)
</text>
<text b>
/ items = ("B")
/ position = (50%, 50%)
</text>
<text c>
/ items = ("C")
/ position = (60%, 50%)
</text>
<text a1>
/ items = ("A1")
/ position = (45%, 50%)
</text>
<text a2>
/ items = ("A2")
/ position = (55%, 50%)
</text>
<text b1>
/ items = ("B1")
/ position = (45%, 50%)
</text>
<text b2>
/ items = ("B2")
/ position = (55%, 50%)
</text>
<text c1>
/ items = ("C1")
/ position = (45%, 50%)
</text>
<text c2>
/ items = ("C2")
/ position = (55%, 50%)
</text>
<text pickone>
/ items = ("Pick one:")
/ position = (50%, 20%)
</text>
<text wherenext>
/ items = ("Where to next?")
/ position = (50%, 20%)
</text>
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