Millisecond Forums

Hi everybody
For my task I need different trials for different trials for different blocks. To be specific, I need different trials for practice block 1, practice block 2, practice block 3 (not in the script-piece below) and experimental block since I need different feedbacks etc.
I had trouble running my script, and I thought it was the case since the different trials were made out with stimuli (words, pictures and sounds) from the same list.
Now I made separate lists that hold the same stimuli (e.g. list.irrelevants1 and list.irrelevants2) for different types of blocktrials.
When I run it, I get the message "could not locate the element trial.P2irrelevants in block 2_3" and "trial 3 is unassigned in block 2_3".

I'm a bit lost. Can somebody see what goes wrong here? Thank you in advance, it would help me very much.
Amelie


Here is a piece of the script:
______________________________________________________
LISTS OF irrelevants stimuli / target stimuli/ probes stimuli

<list irrelevants>
/items = (text.wordirrelevants, picture.pictirrelevants)
/selectionmode=random
/maxrunsize= 1
/replace = false
</list>
<list irrelevants2>
/items = (text.wordirrelevants, picture.pictirrelevants)
/selectionmode=random
/maxrunsize= 1
/replace = false
</list>

<list targets>
/items = (text.wordtargets, picture.picttargets)
/selectionmode=random
/maxrunsize= 1
/replace = false
</list>
<list targets2>
/items = (text.wordtargets, picture.picttargets)
/selectionmode=random
/maxrunsize= 1
/replace = false
</list>

<list probes>
/items = (text.wordprobes, picture.pictprobes)
/selectionmode=random
/maxrunsize= 1
/replace = false
</list>
<list probes2>
/items = (text.wordprobes, picture.pictprobes)
/selectionmode=random
/maxrunsize= 1
/replace = false
</list>
<list irrelevants_sounds>
/items = (sound.soundirrelevants)
/selectionmode=random
/maxrunsize = 1
/poolsize = 6
/replace = false
</list>
<list irrelevants_sounds2>
/items = (sound.soundirrelevants)
/selectionmode=random
/maxrunsize = 1
/poolsize = 6
/replace = false
</list>

<list targets_sounds>
/items = (sound.soundtargets)
/selectionmode=random
/maxrunsize = 1
/poolsize = 2
/replace = false
</list>
<list targets_sounds2>
/items = (sound.soundtargets)
/selectionmode=random
/maxrunsize = 1
/poolsize = 2
/replace = false
</list>

<list probes_sounds>
/items = (sound.soundprobes)
/selectionmode=random
/maxrunsize = 1
/poolsize= 2
/replace = false
</list>
<list probes_sounds2>
/items = (sound.soundprobes)
/selectionmode=random
/maxrunsize = 1
/poolsize= 2
/replace = false
</list>

.......

<block practice1>
/trials = [1-30=noreplacenorepeat(trial.Pirrelevants, trial.Pirrelevants,trial.Pirrelevants,trial.Pirrelevants,trial.Pirrelevants,trial.Pirrelevants,
trial.Pirrelevants, trial.Pirrelevants,trial.Pirrelevants,trial.Pirrelevants,trial.Pirrelevants,trial.Pirrelevants,
trial.Pirrelevants_sounds, trial.Pirrelevants_sounds, trial.Pirrelevants_sounds, trial.Pirrelevants_sounds, trial.Pirrelevants_sounds, trial.Pirrelevants_sounds,
trial.Pprobes,trial.Pprobes, trial.Pprobes,trial.Pprobes,trial.Pprobes_sounds,trial.Pprobes_sounds,trial.Ptargets,trial.Ptargets,trial.Ptargets,trial.Ptargets,
trial.Ptargets_sounds,trial.Ptargets_sounds)]
/ recorddata = true
</block>

<block practice2_1>
/trials = [1= practice2; 2= fingers; 3-32=noreplacenorepeat(trial.P2irrelevants, trial.P2irrelevants,trial.P2irrelevants,trial.P2irrelevants,trial.P2irrelevants,trial.P2irrelevants,
trial.P2irrelevants, trial.P2irrelevants,trial.P2irrelevants,trial.P2irrelevants,trial.P2irrelevants,trial.P2irrelevants,
trial.P2irrelevants_sounds, trial.P2irrelevants_sounds, trial.P2irrelevants_sounds, trial.P2irrelevants_sounds, trial.P2irrelevants_sounds, trial.P2irrelevants_sounds,
trial.P2probes,trial.P2probes, trial.P2probes,trial.P2probes,trial.P2probes_sounds,trial.P2probes_sounds,trial.P2targets,trial.P2targets,trial.P2targets,trial.P2targets,
trial.P2targets_sounds,trial.P2targets_sounds)]
/ branch = [if ((trial.P2irrelevants.percentcorrect + trial.P2irrelevants_sounds.percentcorrect +
            trial.P2probes.percentcorrect + trial.P2probes_sounds.percentcorrect + trial.Ptargets.percentcorrect
            + trial.P2targets_sounds.percentcorrect)/6 < 50
            || ((trial.P2irrelevants.meanlatency + trial.P2irrelevants_sounds.meanlatency)/2 > 800)) block.practice2_2;]
</block>

<block practice2_2>
/trials = [1= practice2_2; 2= fingers; 3-32=noreplacenorepeat(trial.P2irrelevants, trial.P2irrelevants,trial.P2irrelevants,trial.P2irrelevants,trial.P2irrelevants,trial.P2irrelevants,
trial.P2irrelevants, trial.P2irrelevants,trial.P2irrelevants,trial.P2irrelevants,trial.P2irrelevants,trial.P2irrelevants,
trial.P2irrelevants_sounds, trial.P2irrelevants_sounds, trial.P2irrelevants_sounds, trial.P2irrelevants_sounds, trial.P2irrelevants_sounds, trial.P2irrelevants_sounds,
trial.P2probes,trial.P2probes, trial.P2probes,trial.P2probes,trial.P2probes_sounds,trial.P2probes_sounds,trial.P2targets,trial.P2targets,trial.P2targets,trial.P2targets,
trial.P2targets_sounds,trial.P2targets_sounds)]
/ branch = [if ((trial.P2irrelevants.percentcorrect + trial.P2irrelevants_sounds.percentcorrect +
            trial.P2probes.percentcorrect + trial.P2probes_sounds.percentcorrect + trial.Ptargets.percentcorrect
            + trial.P2targets_sounds.percentcorrect)/6 < 50
            || ((trial.P2irrelevants.meanlatency + trial.P2irrelevants_sounds.meanlatency)/2 > 800)) block.practice2_3;]
</block>

<block practice2_3>
/trials = [1= practice2_3; 2= fingers; 3-32=noreplacenorepeat(trial.P2irrelevants, trial.P2irrelevants,trial.P2irrelevants,trial.P2irrelevants,trial.P2irrelevants,trial.P2irrelevants,
trial.P2irrelevants, trial.P2irrelevants,trial.P2irrelevants,trial.P2irrelevants,trial.P2irrelevants,trial.P2irrelevants,
trial.P2irr
elevants_sounds, trial.P2irrelevants_sounds, trial.P2irrelevants_sounds, trial.P2irrelevants_sounds, trial.P2irrelevants_sounds, trial.P2irrelevants_sounds,
trial.P2probes,trial.P2probes, trial.P2probes,trial.P2probes,trial.P2probes_sounds,trial.P2probes_sounds,trial.P2targets,trial.P2targets,trial.P2targets,trial.P2targets,
trial.P2targets_sounds,trial.P2targets_sounds)]
/ branch = [if ((trial.P2irrelevants.percentcorrect + trial.P2irrelevants_sounds.percentcorrect +
            trial.P2probes.percentcorrect + trial.P2probes_sounds.percentcorrect + trial.Ptargets.percentcorrect
            + trial.P2targets_sounds.percentcorrect)/6 < 50
            || ((trial.P2irrelevants.meanlatency + trial.P2irrelevants_sounds.meanlatency)/2 > 800)) block.practicewrong;]
</block>