Millisecond Forums

Hello,
My PhD student and I are editing the script of Motter's Visual Search task - instead of different letter types she is using different categories of word - Anxiety, Neutral, Positive.
While in Motter's task, distractor stimuli were always drawn from a different list to the target in our version on some trials we want the target and distractors to come from the same list - eg finding threat words in a threat matrices.
I have tried to implement a not attribute so that distractors cannot be the same as a target but without success. The target is usually repeated several times
Note there are 8 stimuli on a list and 24 locations so it is acceptable for a given distractor to appear more than once - it just can't be the same as the target on a given trial
This is the line I added,  it can be seen in context below
/ not=[list.Threat_practice_targetStimItemNumber.currentvalue]
N.B. I also edited replace to = true 
Any advice gratefully received
Thank you
Susannah

Note: the following lists control the selection of the target (-> items.stims)
for the selected target category
<list Threat_practice_targetStimItemNumber>
/items = (1, 2, 3, 4, 5, 6, 7, 8)
/ poolsize = 8
/ replace = false
/ resetinterval = 0
</list>

Note: the following lists control the selection of the distractor items
given the current target
(item lists contain the relevant itemnumbers -> item.stims)
<list Threat_practice>
/items = (1, 2, 3, 4, 5, 6, 7, 8)
/ not=[list.Threat_practice_targetStimItemNumber.currentvalue]
/ replace = true
/ selectionrate = always
/ resetinterval = 0
</list>