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>