Millisecond Forums

Diving items from masterlist into sublists (to use and index across the whole experiment)

https://forums.millisecond.com/Topic30778.aspx

By SWIECHE - 2/10/2021

Hi,

I am very new to Inquisit, and trying to set-up an experiment. 

I have a masterlist with 54 items in it, and I would like to divide these items randomly per participant across 4 sublists (list 1: 16 items, list 2: 16 items, list 3: 16 items, list 4: 18 items). This randomization will be in place for the whole of the experiment, and not only in one block or trial. Is there any way to randomly divide items of one list into 4 sublists? I saw one similar post from 7 years ago, but didn't quite understand unfortunately.

Additionally, is there then also a way that inquisit also indexes which items were divided into which sublist?

Thanks in advance for the help!
By Dave - 2/10/2021

 
SWIECHE - 2/10/2021
Hi,

I am very new to Inquisit, and trying to set-up an experiment. 

I have a masterlist with 54 items in it, and I would like to divide these items randomly per participant across 4 sublists (list 1: 16 items, list 2: 16 items, list 3: 16 items, list 4: 18 items). This randomization will be in place for the whole of the experiment, and not only in one block or trial. Is there any way to randomly divide items of one list into 4 sublists? I saw one similar post from 7 years ago, but didn't quite understand unfortunately.

Additionally, is there then also a way that inquisit also indexes which items were divided into which sublist?

Thanks in advance for the help!

Have one <list> with 54 item numbers, and four empty <list>s. Fill those four empty lists /onexptbegin with 16 randomly selected items from the masterlist each. Use the four now filled lists for item selection.

<expt>
/ onexptbegin = [
    list.list1.appenditem(list.masterlist.nextindex);
    list.list1.appenditem(list.masterlist.nextindex);
    list.list1.appenditem(list.masterlist.nextindex);
    list.list1.appenditem(list.masterlist.nextindex);
    list.list1.appenditem(list.masterlist.nextindex);
    list.list1.appenditem(list.masterlist.nextindex);
    list.list1.appenditem(list.masterlist.nextindex);
    list.list1.appenditem(list.masterlist.nextindex);
    list.list1.appenditem(list.masterlist.nextindex);
    list.list1.appenditem(list.masterlist.nextindex);
    list.list1.appenditem(list.masterlist.nextindex);
    list.list1.appenditem(list.masterlist.nextindex);
    list.list1.appenditem(list.masterlist.nextindex);
    list.list1.appenditem(list.masterlist.nextindex);
    list.list1.appenditem(list.masterlist.nextindex);
    list.list1.appenditem(list.masterlist.nextindex);
    
    list.list2.appenditem(list.masterlist.nextindex);
    list.list2.appenditem(list.masterlist.nextindex);
    list.list2.appenditem(list.masterlist.nextindex);
    list.list2.appenditem(list.masterlist.nextindex);
    list.list2.appenditem(list.masterlist.nextindex);
    list.list2.appenditem(list.masterlist.nextindex);
    list.list2.appenditem(list.masterlist.nextindex);
    list.list2.appenditem(list.masterlist.nextindex);
    list.list2.appenditem(list.masterlist.nextindex);
    list.list2.appenditem(list.masterlist.nextindex);
    list.list2.appenditem(list.masterlist.nextindex);
    list.list2.appenditem(list.masterlist.nextindex);
    list.list2.appenditem(list.masterlist.nextindex);
    list.list2.appenditem(list.masterlist.nextindex);
    list.list2.appenditem(list.masterlist.nextindex);
    list.list2.appenditem(list.masterlist.nextindex);
    
    list.list3.appenditem(list.masterlist.nextindex);
    list.list3.appenditem(list.masterlist.nextindex);
    list.list3.appenditem(list.masterlist.nextindex);
    list.list3.appenditem(list.masterlist.nextindex);
    list.list3.appenditem(list.masterlist.nextindex);
    list.list3.appenditem(list.masterlist.nextindex);
    list.list3.appenditem(list.masterlist.nextindex);
    list.list3.appenditem(list.masterlist.nextindex);
    list.list3.appenditem(list.masterlist.nextindex);
    list.list3.appenditem(list.masterlist.nextindex);
    list.list3.appenditem(list.masterlist.nextindex);
    list.list3.appenditem(list.masterlist.nextindex);
    list.list3.appenditem(list.masterlist.nextindex);
    list.list3.appenditem(list.masterlist.nextindex);
    list.list3.appenditem(list.masterlist.nextindex);
    list.list3.appenditem(list.masterlist.nextindex);
    
    list.list4.appenditem(list.masterlist.nextindex);
    list.list4.appenditem(list.masterlist.nextindex);
    list.list4.appenditem(list.masterlist.nextindex);
    list.list4.appenditem(list.masterlist.nextindex);
    list.list4.appenditem(list.masterlist.nextindex);
    list.list4.appenditem(list.masterlist.nextindex);
    list.list4.appenditem(list.masterlist.nextindex);
    list.list4.appenditem(list.masterlist.nextindex);
    list.list4.appenditem(list.masterlist.nextindex);
    list.list4.appenditem(list.masterlist.nextindex);
    list.list4.appenditem(list.masterlist.nextindex);
    list.list4.appenditem(list.masterlist.nextindex);
    list.list4.appenditem(list.masterlist.nextindex);
    list.list4.appenditem(list.masterlist.nextindex);
    list.list4.appenditem(list.masterlist.nextindex);
    list.list4.appenditem(list.masterlist.nextindex);
]
/ blocks = [1-2 = myblock]
</expt>

<list masterlist>
/ poolsize = 54
/ selectionrate = always
</list>

<list list1>
</list>

<list list2>
</list>

<list list3>
</list>

<list list4>
</list>

<block myblock>
/ preinstructions = (intro)
/ trials = [1-54 = noreplace(a,b,c,d)]
</block>

<page intro>
^Items on list 1 displayed in red.
^Items on list 2 displayed in green.
^Items on list 3 displayed in blue.
^Items on list 4 displayed in yellow.
</page>

<trial a>
/ stimulusframes = [1=a]
/ validresponse = (57)
</trial>

<trial b>
/ stimulusframes = [1=b]
/ validresponse = (57)
</trial>

<trial c>
/ stimulusframes = [1=c]
/ validresponse = (57)
</trial>

<trial d>
/ stimulusframes = [1=d]
/ validresponse = (57)
</trial>


<text a>
/ items = allitems
/ txcolor = red
/ select = list.list1.nextvalue
</text>

<text b>
/ items = allitems
/ txcolor = green
/ select = list.list2.nextvalue
</text>

<text c>
/ items = allitems
/ txcolor = blue
/ select = list.list3.nextvalue
</text>

<text d>
/ items = allitems
/ txcolor = yellow
/ select = list.list4.nextvalue
</text>

<item allitems>
/ 1 = "Item 01"
/ 2 = "Item 02"
/ 3 = "Item 03"
/ 4 = "Item 04"
/ 5 = "Item 05"
/ 6 = "Item 06"
/ 7 = "Item 07"
/ 8 = "Item 08"
/ 9 = "Item 09"
/ 10 = "Item 10"
/ 11 = "Item 11"
/ 12 = "Item 12"
/ 13 = "Item 13"
/ 14 = "Item 14"
/ 15 = "Item 15"
/ 16 = "Item 16"
/ 17 = "Item 17"
/ 18 = "Item 18"
/ 19 = "Item 19"
/ 20 = "Item 20"
/ 21 = "Item 21"
/ 22 = "Item 22"
/ 23 = "Item 23"
/ 24 = "Item 24"
/ 25 = "Item 25"
/ 26 = "Item 26"
/ 27 = "Item 27"
/ 28 = "Item 28"
/ 29 = "Item 29"
/ 30 = "Item 30"
/ 31 = "Item 31"
/ 32 = "Item 32"
/ 33 = "Item 33"
/ 34 = "Item 34"
/ 35 = "Item 35"
/ 36 = "Item 36"
/ 37 = "Item 37"
/ 38 = "Item 38"
/ 39 = "Item 39"
/ 40 = "Item 40"
/ 41 = "Item 41"
/ 42 = "Item 42"
/ 43 = "Item 43"
/ 44 = "Item 44"
/ 45 = "Item 45"
/ 46 = "Item 46"
/ 47 = "Item 47"
/ 48 = "Item 48"
/ 49 = "Item 49"
/ 50 = "Item 50"
/ 51 = "Item 51"
/ 52 = "Item 52"
/ 53 = "Item 53"
/ 54 = "Item 54"
</item>