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VLT - fixing stimulus presentation time

Safe100 — Wed, 12 May 2021 14:47:24 GMT

Hi,
I'm part of a study group that needs to set up a verbal learning test on inquisit. We are all unfamiliar with programming so we are kind of lost.
The task is pretty easy. 30 words are presented each 1000ms with a 2000ms break in between the words. There is no response or reaction. So this is what we got so far:

<text VLT>
/ items = ("WHEAT","" ,"NOOK", "" , "BAD", "" , "CLAIM","", "RAW","","CORPSE", "", "HUGE", "", "WEAL", "", "CAKE", "", "NEW" , "",
"GAIN", "", "SORE", "", "SMUT", "", "FOLK", "", "DIRT", "", "CRIB", "", "THICK", "","NEED","", "ZONE", "", "SOFT","", "PURE", "", "JEST", "", "FEAR", "", "GLANCE", "", "STRAND", "", "FINE", "", "BEAST", "", "MONTH")
/ select = sequence
</text>

I guess, this is not the most convenient way to set this up, but at least the words are presented in the right order with a blank stimulus in between. The problem is, that now the participant had to press a key for the next word to show up, but we want to fix the duration. So we want to figure out how the words are presented for 1000ms and the blank stimuli for 2000ms. So once the participant starts the trial it should run automatically from the first to the last word.

So, if you are not insulted by the simplicity of this task, we would be super grateful if you could help us.

Lea

RE: VLT - fixing stimulus presentation time

Safe100 — Wed, 12 May 2021 14:47:24 GMT

Wow, that helps a lot! Thank you so much :)

RE: VLT - fixing stimulus presentation time

Dave — Wed, 12 May 2021 14:39:14 GMT

+x[quote]

[b]Safe100 - 5/12/2021[/b]
Hi,
I'm part of a study group that needs to set up a verbal learning test on inquisit. We are all unfamiliar with programming so we are kind of lost.
The task is pretty easy. 30 words are presented each 1000ms with a 2000ms break in between the words. There is no response or reaction. So this is what we got so far:

<text VLT>
/ items = ("WHEAT","" ,"NOOK", "" , "BAD", "" , "CLAIM","", "RAW","","CORPSE", "", "HUGE", "", "WEAL", "", "CAKE", "", "NEW" , "",
"GAIN", "", "SORE", "", "SMUT", "", "FOLK", "", "DIRT", "", "CRIB", "", "THICK", "","NEED","", "ZONE", "", "SOFT","", "PURE", "", "JEST", "", "FEAR", "", "GLANCE", "", "STRAND", "", "FINE", "", "BEAST", "", "MONTH")
/ select = sequence
</text>

I guess, this is not the most convenient way to set this up, but at least the words are presented in the right order with a blank stimulus in between. The problem is, that now the participant had to press a key for the next word to show up, but we want to fix the duration. So we want to figure out how the words are presented for 1000ms and the blank stimuli for 2000ms. So once the participant starts the trial it should run automatically from the first to the last word.

So, if you are not insulted by the simplicity of this task, we would be super grateful if you could help us.

Lea
[/quote]

You need to set up a <trial> that presents the text stimulus, set the trial to take no response, a fixed duration of 3000 ms with a posttrialpause of 2000 ms. Then run that trial 30 times via a <block>. Note that there are only 28, not 30, word items in the code snippet you provided.

[code]<block VLTblock>
/ trials = [1-28 = VLTtrial]
</block>

<trial VLTtrial>
/ stimulusframes = [1 = VLT]
/ validresponse = (0)
/ trialduration = 3000
/ posttrialpause = 2000
</trial>

<text VLT>
/ items = VLTitems
/ select = sequence
</text>

<item VLTitems>
/ 1 = "WHEAT"
/ 2 = "NOOK"
/ 3 = "BAD"
/ 4 = "CLAIM"
/ 5 = "RAW"
/ 6 = "CORPSE"
/ 7 = "HUGE"
/ 8 = "WEAL"
/ 9 = "CAKE"
/ 10 = "NEW"
/ 11 = "GAIN"
/ 12 = "SORE"
/ 13 = "SMUT"
/ 14 = "FOLK"
/ 15 = "DIRT"
/ 16 = "CRIB"
/ 17 = "THICK"
/ 18 = "NEED"
/ 19 = "ZONE"
/ 20 = "SOFT"
/ 21 = "PURE"
/ 22 = "JEST"
/ 23 = "FEAR"
/ 24 = "GLANCE"
/ 25 = "STRAND"
/ 26 = "FINE"
/ 27 = "BEAST"
/ 28 = "MONTH"
</item>[/code]

To familiarize with the basics of setting up tasks with Inquisit, see the tutorials in the documentation:
https://www.millisecond.com/support/docs/v6/html/tutorials/tutorials.htm