Random background stimuli


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Matteo Masi
Matteo Masi
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Hi all!
I'm struggling to create a study in which subjects are asked to rate a series of faces on a Likert scale while in the background is played a sequence of random sounds. Specifically, I don't understand how to create a pool from which randomly picking out one sound per time until the end of the block. I don't want to set any limit to the sampling of sounds, just to be sure that the subject listens continuously to a random series until he rates all the faces of the list.
Has anyone ever tried to create something like this?

Here's my code:

######items##############################################################

<item pictureitems>
/ 1 = "c0_p1_t2.jpg"
/ 2 = "c0_p1_t-2.jpg"
/ 3 = "c0_p1_t3.jpg"
/ 4 = "c0_p1_t-3.jpg"
/ 5 = "c0_p2_t2.jpg"
/ 6 = "c0_p2_t-2.jpg"
/ 7 = "c0_p2_t3.jpg"
/ 8 = "c0_p2_t-3.jpg"
/ 9 = "c0_p3_t2.jpg"
/ 10 = "c0_p3_t-2.jpg"
/ 11 = "c0_p3_t3.jpg"
/ 12 = "c0_p3_t-3.jpg"
/ 13 = "c0_p4_t2.jpg"
/ 14 = "c0_p4_t-2.jpg"
/ 15 = "c0_p4_t3.jpg"
/ 16 = "c0_p4_t-3.jpg"
/ 17 = "c0_p5_t2.jpg"
/ 18 = "c0_p5_t-2.jpg"
/ 19 = "c0_p5_t3.jpg"
/ 20 = "c0_p5_t-3.jpg"
/ 21 = "c0_p6_t2.jpg"
/ 22 = "c0_p6_t-2.jpg"
/ 23 = "c0_p6_t3.jpg"
/ 24 = "c0_p6_t-3.jpg"
</item>

<item soundsitems_threat>
/1 = "threat1.mp3"
/2 = "threat2.mp3"
/3 = "threat3.mp3"
</item>

<item soundsitems_neutral>
/1 = "neutral1.mp3"
/2 = "neutral2.mp3"
/3 = "neutral3.mp3"
</item>

<item soundsitems_negative>
/1 = "negativw1.mp3"
/2 = "negative2.mp3"
/3 = "negative3.mp3"
</item>

#video and picture elements###############################################

<picture faces>
/ items = pictureitems
/ position = (50, 40)
</picture>

<video sounds_threat>
/ erase = false
/ items = soundsitems_threat
/ playthrough = true
/ selectionrate = block
/ resetinterval = 0
/ size = (2,2)
/ position = (1,1)
/ select = noreplace
</video>

<video sounds_neutral>
/ erase = false
/ items = soundsitems_neutral
/ playthrough = true
/ selectionrate = block
/ resetinterval = 0
/ size = (2,2)
/ position = (1,1)
/ select = noreplace
</video>

<video sounds_negative>
/ erase = false
/ items = soundsitems_negative
/ playthrough = true
/ selectionrate = block
/ resetinterval = 0
/ size = (2,2)
/ position = (1,1)
/ select = noreplace
</video>

###########################trials########################################

<likert face_rate>
/ stimulusframes = [1=faces]
/ position = (50, 80)
/ anchorwidth = (10%)
/ anchors = [1 = "DISONESTO"; 4 = "Né DISONESTO Né ONESTO"; 7 = "ONESTO"]
/ buttonvalues = [1="-3", 2="-2", 3="-1", 4="0", 5="1", 6="2", 7="3"]
/ numpoints = 7
</likert>

################blocks######################################################
<block threat>
/ trials = [1 - 24 = noreplace(face_rate)]
/ preinstructions = (instruction)
/ postinstructions = (post)
/ bgstim = (sounds_threat)
</block>

<block neutral>
/ trials = [1 - 24 = noreplace(face_rate)]
/ preinstructions = (instruction)
/ postinstructions = (post)
/ bgstim = (sounds_neutral)
</block>

<block negative>
/ trials = [1 - 24 = noreplace(face_rate)]
/ preinstructions = (instruction)
/ postinstructions = (post)
/ bgstim = (sounds_negative)
</block>

################experiment##################################################

<expt face_sounds>
/ blocks = [ 1-3 = noreplace(negative, threat, neutral); 4= Demographic]
/ preinstructions = (intro_1, intro_2)
/ postinstructions = (end)
</expt>


Dave
Dave
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Matteo Masi - 3/21/2020
Hi all!
I'm struggling to create a study in which subjects are asked to rate a series of faces on a Likert scale while in the background is played a sequence of random sounds. Specifically, I don't understand how to create a pool from which randomly picking out one sound per time until the end of the block. I don't want to set any limit to the sampling of sounds, just to be sure that the subject listens continuously to a random series until he rates all the faces of the list.
Has anyone ever tried to create something like this?

Here's my code:

######items##############################################################

<item pictureitems>
/ 1 = "c0_p1_t2.jpg"
/ 2 = "c0_p1_t-2.jpg"
/ 3 = "c0_p1_t3.jpg"
/ 4 = "c0_p1_t-3.jpg"
/ 5 = "c0_p2_t2.jpg"
/ 6 = "c0_p2_t-2.jpg"
/ 7 = "c0_p2_t3.jpg"
/ 8 = "c0_p2_t-3.jpg"
/ 9 = "c0_p3_t2.jpg"
/ 10 = "c0_p3_t-2.jpg"
/ 11 = "c0_p3_t3.jpg"
/ 12 = "c0_p3_t-3.jpg"
/ 13 = "c0_p4_t2.jpg"
/ 14 = "c0_p4_t-2.jpg"
/ 15 = "c0_p4_t3.jpg"
/ 16 = "c0_p4_t-3.jpg"
/ 17 = "c0_p5_t2.jpg"
/ 18 = "c0_p5_t-2.jpg"
/ 19 = "c0_p5_t3.jpg"
/ 20 = "c0_p5_t-3.jpg"
/ 21 = "c0_p6_t2.jpg"
/ 22 = "c0_p6_t-2.jpg"
/ 23 = "c0_p6_t3.jpg"
/ 24 = "c0_p6_t-3.jpg"
</item>

<item soundsitems_threat>
/1 = "threat1.mp3"
/2 = "threat2.mp3"
/3 = "threat3.mp3"
</item>

<item soundsitems_neutral>
/1 = "neutral1.mp3"
/2 = "neutral2.mp3"
/3 = "neutral3.mp3"
</item>

<item soundsitems_negative>
/1 = "negativw1.mp3"
/2 = "negative2.mp3"
/3 = "negative3.mp3"
</item>

#video and picture elements###############################################

<picture faces>
/ items = pictureitems
/ position = (50, 40)
</picture>

<video sounds_threat>
/ erase = false
/ items = soundsitems_threat
/ playthrough = true
/ selectionrate = block
/ resetinterval = 0
/ size = (2,2)
/ position = (1,1)
/ select = noreplace
</video>

<video sounds_neutral>
/ erase = false
/ items = soundsitems_neutral
/ playthrough = true
/ selectionrate = block
/ resetinterval = 0
/ size = (2,2)
/ position = (1,1)
/ select = noreplace
</video>

<video sounds_negative>
/ erase = false
/ items = soundsitems_negative
/ playthrough = true
/ selectionrate = block
/ resetinterval = 0
/ size = (2,2)
/ position = (1,1)
/ select = noreplace
</video>

###########################trials########################################

<likert face_rate>
/ stimulusframes = [1=faces]
/ position = (50, 80)
/ anchorwidth = (10%)
/ anchors = [1 = "DISONESTO"; 4 = "Né DISONESTO Né ONESTO"; 7 = "ONESTO"]
/ buttonvalues = [1="-3", 2="-2", 3="-1", 4="0", 5="1", 6="2", 7="3"]
/ numpoints = 7
</likert>

################blocks######################################################
<block threat>
/ trials = [1 - 24 = noreplace(face_rate)]
/ preinstructions = (instruction)
/ postinstructions = (post)
/ bgstim = (sounds_threat)
</block>

<block neutral>
/ trials = [1 - 24 = noreplace(face_rate)]
/ preinstructions = (instruction)
/ postinstructions = (post)
/ bgstim = (sounds_neutral)
</block>

<block negative>
/ trials = [1 - 24 = noreplace(face_rate)]
/ preinstructions = (instruction)
/ postinstructions = (post)
/ bgstim = (sounds_negative)
</block>

################experiment##################################################

<expt face_sounds>
/ blocks = [ 1-3 = noreplace(negative, threat, neutral); 4= Demographic]
/ preinstructions = (intro_1, intro_2)
/ postinstructions = (end)
</expt>


This can't be done with /bgstim, /bgstim will pick and play one sound item during a given block, it can't be used to play a series of items during the block.

Matteo Masi
Matteo Masi
New Member (11 reputation)New Member (11 reputation)New Member (11 reputation)New Member (11 reputation)New Member (11 reputation)New Member (11 reputation)New Member (11 reputation)New Member (11 reputation)New Member (11 reputation)
Group: Forum Members
Posts: 4, Visits: 52
Dave - 3/23/2020
Matteo Masi - 3/21/2020
Hi all!
I'm struggling to create a study in which subjects are asked to rate a series of faces on a Likert scale while in the background is played a sequence of random sounds. Specifically, I don't understand how to create a pool from which randomly picking out one sound per time until the end of the block. I don't want to set any limit to the sampling of sounds, just to be sure that the subject listens continuously to a random series until he rates all the faces of the list.
Has anyone ever tried to create something like this?

Here's my code:

######items##############################################################

<item pictureitems>
/ 1 = "c0_p1_t2.jpg"
/ 2 = "c0_p1_t-2.jpg"
/ 3 = "c0_p1_t3.jpg"
/ 4 = "c0_p1_t-3.jpg"
/ 5 = "c0_p2_t2.jpg"
/ 6 = "c0_p2_t-2.jpg"
/ 7 = "c0_p2_t3.jpg"
/ 8 = "c0_p2_t-3.jpg"
/ 9 = "c0_p3_t2.jpg"
/ 10 = "c0_p3_t-2.jpg"
/ 11 = "c0_p3_t3.jpg"
/ 12 = "c0_p3_t-3.jpg"
/ 13 = "c0_p4_t2.jpg"
/ 14 = "c0_p4_t-2.jpg"
/ 15 = "c0_p4_t3.jpg"
/ 16 = "c0_p4_t-3.jpg"
/ 17 = "c0_p5_t2.jpg"
/ 18 = "c0_p5_t-2.jpg"
/ 19 = "c0_p5_t3.jpg"
/ 20 = "c0_p5_t-3.jpg"
/ 21 = "c0_p6_t2.jpg"
/ 22 = "c0_p6_t-2.jpg"
/ 23 = "c0_p6_t3.jpg"
/ 24 = "c0_p6_t-3.jpg"
</item>

<item soundsitems_threat>
/1 = "threat1.mp3"
/2 = "threat2.mp3"
/3 = "threat3.mp3"
</item>

<item soundsitems_neutral>
/1 = "neutral1.mp3"
/2 = "neutral2.mp3"
/3 = "neutral3.mp3"
</item>

<item soundsitems_negative>
/1 = "negativw1.mp3"
/2 = "negative2.mp3"
/3 = "negative3.mp3"
</item>

#video and picture elements###############################################

<picture faces>
/ items = pictureitems
/ position = (50, 40)
</picture>

<video sounds_threat>
/ erase = false
/ items = soundsitems_threat
/ playthrough = true
/ selectionrate = block
/ resetinterval = 0
/ size = (2,2)
/ position = (1,1)
/ select = noreplace
</video>

<video sounds_neutral>
/ erase = false
/ items = soundsitems_neutral
/ playthrough = true
/ selectionrate = block
/ resetinterval = 0
/ size = (2,2)
/ position = (1,1)
/ select = noreplace
</video>

<video sounds_negative>
/ erase = false
/ items = soundsitems_negative
/ playthrough = true
/ selectionrate = block
/ resetinterval = 0
/ size = (2,2)
/ position = (1,1)
/ select = noreplace
</video>

###########################trials########################################

<likert face_rate>
/ stimulusframes = [1=faces]
/ position = (50, 80)
/ anchorwidth = (10%)
/ anchors = [1 = "DISONESTO"; 4 = "Né DISONESTO Né ONESTO"; 7 = "ONESTO"]
/ buttonvalues = [1="-3", 2="-2", 3="-1", 4="0", 5="1", 6="2", 7="3"]
/ numpoints = 7
</likert>

################blocks######################################################
<block threat>
/ trials = [1 - 24 = noreplace(face_rate)]
/ preinstructions = (instruction)
/ postinstructions = (post)
/ bgstim = (sounds_threat)
</block>

<block neutral>
/ trials = [1 - 24 = noreplace(face_rate)]
/ preinstructions = (instruction)
/ postinstructions = (post)
/ bgstim = (sounds_neutral)
</block>

<block negative>
/ trials = [1 - 24 = noreplace(face_rate)]
/ preinstructions = (instruction)
/ postinstructions = (post)
/ bgstim = (sounds_negative)
</block>

################experiment##################################################

<expt face_sounds>
/ blocks = [ 1-3 = noreplace(negative, threat, neutral); 4= Demographic]
/ preinstructions = (intro_1, intro_2)
/ postinstructions = (end)
</expt>


This can't be done with /bgstim, /bgstim will pick and play one sound item during a given block, it can't be used to play a series of items during the block.

Thanks Dave,
I'll find an alternative solution. 

Matteo
Dave
Dave
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Matteo Masi - 3/23/2020

Thanks Dave,
I'll find an alternative solution. 

Matteo

If you're having trouble finding a workable solution, let me know. I might have a couple of ideas. (It would be great if you could attach the full script and files -- mp3s and images -- in that case; you can do so by zipping them up and then uploading the ZIP archive via +Insert -> Add File).

Matteo Masi
Matteo Masi
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Group: Forum Members
Posts: 4, Visits: 52
Dave - 3/23/2020
Matteo Masi - 3/23/2020

Thanks Dave,
I'll find an alternative solution. 

Matteo

If you're having trouble finding a workable solution, let me know. I might have a couple of ideas. (It would be great if you could attach the full script and files -- mp3s and images -- in that case; you can do so by zipping them up and then uploading the ZIP archive via +Insert -> Add File).

Thanks a lot, I really can't figure it out. I'm attaching the .zip archive. If you ever need anything else let me know. 
Matteo
Attachments
Study2.rar (9 views, 2.00 MB)
Dave
Dave
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Matteo Masi - 3/23/2020
Dave - 3/23/2020
Matteo Masi - 3/23/2020

Thanks Dave,
I'll find an alternative solution. 

Matteo

If you're having trouble finding a workable solution, let me know. I might have a couple of ideas. (It would be great if you could attach the full script and files -- mp3s and images -- in that case; you can do so by zipping them up and then uploading the ZIP archive via +Insert -> Add File).

Thanks a lot, I really can't figure it out. I'm attaching the .zip archive. If you ever need anything else let me know. 
Matteo

The attached approach is the best / closest thing I can come up with.
Attachments
Study2_rev.zip (10 views, 2.00 MB)
Matteo Masi
Matteo Masi
New Member (11 reputation)New Member (11 reputation)New Member (11 reputation)New Member (11 reputation)New Member (11 reputation)New Member (11 reputation)New Member (11 reputation)New Member (11 reputation)New Member (11 reputation)
Group: Forum Members
Posts: 4, Visits: 52
Dave - 3/23/2020
Matteo Masi - 3/23/2020
Dave - 3/23/2020
Matteo Masi - 3/23/2020

Thanks Dave,
I'll find an alternative solution. 

Matteo

If you're having trouble finding a workable solution, let me know. I might have a couple of ideas. (It would be great if you could attach the full script and files -- mp3s and images -- in that case; you can do so by zipping them up and then uploading the ZIP archive via +Insert -> Add File).

Thanks a lot, I really can't figure it out. I'm attaching the .zip archive. If you ever need anything else let me know. 
Matteo

The attached approach is the best / closest thing I can come up with.

Thank you, Dave!
that's amazing! I've runned it and seemed to work pretty well. Great. 

Matteo
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