Dear all,
Currently I am programming an experiment, which contains akind of priming paradigm.
I got two categories of ten different priming words (= 20primes) and two categories of ten different target words (= 20 targets). When Icombine the priming words with the categories, I get 4 different conditions,each containing 10 primes and 10 targets.
In each condition I would like to pair a prime with atarget. Every prime and every target in the condition should be used once. Butwhich prime is paired with which target should be random.
Unfortunaltey, when I programmed the experiment, some primesand targets within a condition are used more often than once, while others werenot used at all.
Can you help me with this problem? Thank you very much!
This is how I defined the items:
<item items_cat1words>
/1 = "cat1word1"
/2 = " cat1word 2"
/3 = " cat1word 3"
/4 = " cat1word 4"
/5 = " cat1word 5"
/6 = " cat1word 6"
/7 = " cat1word 7"
/8 = " cat1word 8"
/9 = " cat1word 9"
/10 = " cat1word10"
</item>
<text cat1word>
/ items= items_cat1words
/ position = (50,50)
/ select = noreplacenorepeat
</text>
This is how I defined the trials:
<trial t.1>
/ stimulustimes = [0 = fixation; 500 = blank; 1000 =cat1prime; 1200 = blank; 1250 = cat2word]
/ response = timeout(2000)
/ validresponse = ("A", "a","6")
/ correctresponse = ("A", "a")
/ posttrialpause = (1500)
</trial>
And this is how i defined the block:
<block b.experiment>
/ bgstim = (bgword, bgnonword)
/ trials = [1-40 = noreplacenorepeat(t.1, t.2, t.3, t.4)]
/ preinstructions = (instructions)
</block>