Millisecond Forums

The way you do this is to randomly select a subset of words to be presented / learned (those will be your "old" words) at the start of the experiment (/onexptbegin), and take the rest and designate them as your "new" words -- just like the example linked shows.

Here's a basic example:

<item allwords>
/ 1 = "Heimat"
/ 2 = "Humor"
/ 3 = "Reise"
/ 4 = "Sonne"
/ 5 = "Urlaub"
/ 6 = "Treue"
/ 7 = "Party"
/ 8 = "Advent"
/ 9 = "Bedarf"
/ 10 = "Länge"
/ 11 = "Kader"
/ 12 = "Marke"
/ 13 = "Strecke"
/ 14 = "Runde"
/ 15 = "Handel"
/ 16 = "Finger"
/ 17 = "Mörder"
/ 18 = "Leiche"
/ 19 = "Waffe"
/ 20 = "Armut"
/ 21 = "Panik"
/ 22 = "Falle"
/ 23 = "Verlust"
/ 24 = "Unfall"
</item>

<list allitemnumbers>
/ poolsize = 24
/ selectionrate = always
</list>

<list olditemnumbers>
/ selectionrate = always
</list>

<list newitemnumbers>
/ selectionrate = always
</list>

// select 9 random item numbers out of all 24 item numbers
// and store them in list.olditemnumbers
// select 6 random item numbers out of the 24
// and store them in list.newitemnumbers
<expt>
/ onexptbegin = [
    list.olditemnumbers.appenditem(list.allitemnumbers.nextindex);
    list.olditemnumbers.appenditem(list.allitemnumbers.nextindex);
    list.olditemnumbers.appenditem(list.allitemnumbers.nextindex);
    list.olditemnumbers.appenditem(list.allitemnumbers.nextindex);
    list.olditemnumbers.appenditem(list.allitemnumbers.nextindex);
    list.olditemnumbers.appenditem(list.allitemnumbers.nextindex);
    list.olditemnumbers.appenditem(list.allitemnumbers.nextindex);
    list.olditemnumbers.appenditem(list.allitemnumbers.nextindex);
    list.olditemnumbers.appenditem(list.allitemnumbers.nextindex);

    list.newitemnumbers.appenditem(list.allitemnumbers.nextindex);
    list.newitemnumbers.appenditem(list.allitemnumbers.nextindex);
    list.newitemnumbers.appenditem(list.allitemnumbers.nextindex);
    list.newitemnumbers.appenditem(list.allitemnumbers.nextindex);
    list.newitemnumbers.appenditem(list.allitemnumbers.nextindex);
    list.newitemnumbers.appenditem(list.allitemnumbers.nextindex);
]
/ blocks = [1=learningblock; 2=old_new_block]
</expt>

// learning / presentation phase
<block learningblock>
/ trials = [1=learningtrial]
</block>

<trial learningtrial>
/ stimulusframes = [1=word1,word2,word3,word4,word5,word6,word7,word8,word9,prompt]
/ validresponse = (57)
</trial>

<text word1>
/ items = allwords
/ select = list.olditemnumbers.nextvalue
/ position = (50%, 15%)
</text>

<text word2>
/ items = allwords
/ select = list.olditemnumbers.nextvalue
/ position = (50%, 20%)
</text>

<text word3>
/ items = allwords
/ select = list.olditemnumbers.nextvalue
/ position = (50%, 25%)
</text>

<text word4>
/ items = allwords
/ select = list.olditemnumbers.nextvalue
/ position = (50%, 30%)
</text>

<text word5>
/ items = allwords
/ select = list.olditemnumbers.nextvalue
/ position = (50%, 35%)
</text>

<text word6>
/ items = allwords
/ select = list.olditemnumbers.nextvalue
/ position = (50%, 40%)
</text>

<text word7>
/ items = allwords
/ select = list.olditemnumbers.nextvalue
/ position = (50%, 45%)
</text>

<text word8>
/ items = allwords
/ select = list.olditemnumbers.nextvalue
/ position = (50%, 50%)
</text>

<text word9>
/ items = allwords
/ select = list.olditemnumbers.nextvalue
/ position = (50%, 55%)
</text>

<text prompt>
/ items = ("Remember these words:")
/ position = (50%, 5%)
</text>

// recall / old-new jusdgment phase
<block old_new_block>
/ trials = [1-15 = noreplace(oldtrial, oldtrial, oldtrial, newtrial, newtrial)]
</block>

<trial oldtrial>
/ stimulusframes = [1=oldword, oldnewprompt]
/ validresponse = ("o", "n")
/ correctresponse = ("o")
</trial>

<trial newtrial>
/ stimulusframes = [1=newword, oldnewprompt]
/ validresponse = ("o", "n")
/ correctresponse = ("n")
</trial>

<text oldword>
/ items = allwords
/ select = list.olditemnumbers.nextvalue
</text>

<text newword>
/ items = allwords
/ select = list.newitemnumbers.nextvalue
</text>

<text oldnewprompt>
/ items = ("Press 'O' for 'old', press 'N' for 'new'")
/ position = (50%, 5%)
</text>

Dear Dave, I am sorry but these discussion do not really help me in the moment. 
The special thing here is that, in the encoding task every subject sees different words. How can I ensure now that in the recognition task the recently presented words appear and also new words? Furthermore I have to make sure, that words which a correctly judged as new or old are also recognised as correct from Inquisit. 

<item AlleWörter>
/ 1 = "Heimat"
/ 2 = "Humor"
/ 3 = "Reise"
/ 4 = "Sonne"
/ 5 = "Urlaub"
/ 6 = "Treue"
/ 7 = "Party"
/ 8 = "Advent"
/ 9 = "Bedarf"
/ 10 = "Länge"
/ 11 = "Kader"
/ 12 = "Marke"
/ 13 = "Strecke"
/ 14 = "Runde"
/ 15 = "Handel"
/ 16 = "Finger"
/ 17 = "Mörder"
/ 18 = "Leiche"
/ 19 = "Waffe"
/ 20 = "Armut"
/ 21 = "Panik"
/ 22 = "Falle"
/ 23 = "Verlust"
/ 24 = "Unfall"
</item>

<text BekannteWords>
/fontstyle = ("Arial", 5%, true, false, false, false, 5, 0)
/items = AlleWörter
/position=(50%,50%)
</text>

<text NeueWords>
/fontstyle = ("Arial", 5%, true, false, false, false, 5, 0)
/items = AlleWörter
/position=(50%,50%)
</text>

one version with BekannteWord: correct response = f, neue word: correct response = j; second version the other way around

<trial BekannteWordsVersion1>
/ stimulusframes = [1-24 = noreplace(BekannteWords)]
/inputdevice = keyboard
/ validresponse = ("F", "J")
/ correctresponse = ("F")
</trial>

<trial NeueWordsVersion1>
/ stimulusframes = [1-24 = noreplace(NeueWords)]
/inputdevice = keyboard
/ validresponse = ("F", "J")
/ correctresponse = ("J")
</trial>

<trial BekannteWordsVersion2>
/ stimulusframes = [1-24 = noreplace(BekannteWords)]
/inputdevice = keyboard
/ validresponse = ("F", "J")
/ correctresponse = ("J")
</trial>

<trial NeueWordsVersion2>
/ stimulusframes = [1-24 = noreplace(NeueWords)]
/inputdevice = keyboard
/ validresponse = ("F", "J")
/ correctresponse = ("F")
</trial>


double check whether amount of trails is correct!

<block AbrufWordsInstructVersion1>
/trials = [1=InstruktionAbrufVersion1]
</block>

<block AbrufWordsVersion1>
/bgstim = (ButtonBekanntVersion1, ButtonNeuVersion1)
/trials = [1-15 = noreplace(BekannteWordsVersion1, BekannteWordsVersion1, BekannteWordsVersion1, BekannteWordsVersion1, BekannteWordsVersion1, BekannteWordsVersion1, BekannteWordsVersion1, BekannteWordsVersion1, BekannteWordsVersion1,
NeueWordsVersion1, NeueWordsVersion1, NeueWordsVersion1, NeueWordsVersion1, NeueWordsVersion1, NeueWordsVersion1)]
</block>


double check whether amount of trails is correct!

<block AbrufWordsInstructVersion2>
/trials = [1 = InstruktionAbrufVersion2]
</block>

<block AbrufWordsVersion2>
/bgstim = (ButtonBekanntVersion2, ButtonNeuVersion2)
/trials = [1-15 = noreplace(BekannteWordsVersion2, BekannteWordsVersion2, BekannteWordsVersion2, BekannteWordsVersion2, BekannteWordsVersion2, BekannteWordsVersion2, BekannteWordsVersion2, BekannteWordsVersion2, BekannteWordsVersion2,
NeueWordsVersion2, NeueWordsVersion2, NeueWordsVersion2, NeueWordsVersion2, NeueWordsVersion2, NeueWordsVersion2)]


Thank you so much for your help, I am desperately looking for any advice. 

Designs like this have been discussed here a number of times. See e.g, https://www.millisecond.com/forums/Topic17069.aspx