Millisecond Forums

It's not possible to do it all "on the same screen"; the closest you can get is with something like this (I'm leaving out the "playing back the sounds"-part):

<values>
/ a_resp = ""
/ b_resp = ""
/ pairnumber = 1
</values>

<block myblock>
/ trials = [1-2=start]
</block>

<trial start>
/ ontrialbegin = [values.a_resp=""; values.b_resp=""; values.pairnumber=list.stimpairs.nextindex; ]
/ stimulusframes = [1=blank]
/ trialduration = 0
/ branch = [trial.click]
/ recorddata = false
</trial>

<trial click>
/ inputdevice = mouse
/ stimulusframes = [1=a, b]
/ validresponse = (a, b)
/ branch = [if (trial.click.response == "a" && values.a_resp == "") openended.a_write]
/ branch = [if (trial.click.response == "b" && values.b_resp == "") openended.b_write]
/ branch = [trial.click]
</trial>

<openended a_write>
/ ontrialend = [values.a_resp=openended.a_write.response]
/ isvalidresponse = [openended.a_write.response != ""]
/ position = (40%, 60%)
/ branch = [if(values.b_resp == "") trial.click else likert.rate]
</openended>

<openended b_write>
/ ontrialend = [values.b_resp=openended.b_write.response]
/ isvalidresponse = [openended.b_write.response != ""]
/ position = (60%, 60%)
/ branch = [if(values.a_resp == "") trial.click else likert.rate]
</openended>

<likert rate>
/ anchors = [1="A"; 4="Neither"; 7="B"]
/ numpoints = 7
/ position = (50%, 80%)
</likert>

<text a>
/ items = a_items
/ erase = false
/ position = (40%, 40%)
/ select = values.pairnumber
</text>

<text b>
/ items = b_items
/ erase = false
/ position = (60%, 40%)
/ select = values.pairnumber
</text>

<item a_items>
/ 1 = "The Beatles"
/ 2 = "Mozart"
</item>

<item b_items>
/ 1 = "Rolling Stones"
/ 2 = "Beethoven"
</item>

<shape blank>
/ shape = rectangle
/ color = white
/ size = (100%, 100%)
/ erase = false
</shape>

<list stimpairs>
/ poolsize = 2
</list>

Thanks Dave.

Its complicated for me. Let me figure your code out and adapt it first. Will get back if there are issues.

Hi Dave,
Thanks for this. Its working as desired.
But I am stuck again.

I want to play sound in loop till the time participant is ready to write in open ended text box. So he clicks on 'a' / 'b' item and sound is continuously played till the time  he finishes  writing  text in the text box and stops when he clicks on 'continue' to move on to 'b'. Then it repeats and he rates the sounds.

Thanks.

Play back the sounds via the <openended> /stimulusframes. Convert your sounds to MP3 and use the <video> element (not the <sound> element). Set its /loop attribute to true. Set the <openended>'s /beginsresponsetime to 0.

<openended a_write>
/ stimulusframes = [1=a_sound]
/ beginresponsetime = 0
/ ontrialend = [values.a_resp=openended.a_write.response]
/ isvalidresponse = [openended.a_write.response != ""]
/ position = (40%, 60%)
/ branch = [if(values.b_resp == "") trial.click else likert.rate]
</openended>

<video a_sound>
...
/ loop = true
</video>

Thanks Dave. Working perfectly.

Another unrelated question which I had seen other times also. When I play audio through video loop, it  breaks . So when I am playing 'coke' (its a recorded voice saying coke; very short sound). so the sound that video element plays is 'k..coke' ; 'k..coke' and so on. whereas when I play the same sound through trial or sound element, I dont hear any break (its coke and not k..coke ) .

does it have to do with mp3 kind of files ? should I change the format ? Or is it the length of file ?

<video sound>
/ items = ("coke.mp3")
/ loop = true
/ playthrough = false
</video>

I don't know. It may be due to the sound being extremely short -- perhaps try inserting a little bit of silence before or after the actual spoken word in the audio file.

Thanks for it again.

I think it has to do some thing with the loop. I tried with the following sentence ' I want to hear you say it' and played it in loop. It starts repeating it after the word 'say' and goes in loop. If I play it just once then it goes perfectly fine.

Hmm, I seem to be unable to reproduce this. I've attached a short MP3 for testing purposes -- the file starts and ends with a short bit of silence, with the spoken word "coke" in between. What happens when you loop this file? Is it still cut off or causing some weird overlap?

Thanks!

Yes, you are right . Doesn't happen with this .

But I am noticing another thing. When I play such short names on loop, its not played at a uniform speed. What I mean is that the pauses in between the repetitions is not uniform. Sometimes the pause is too long sometimes its too short . (Although its not a problem for me in the current study)

Thanks.