Millisecond Forums

Completely clear!
Thank you for your time and you patience!

You need only _one_ <picture> element, not three. You then simply change what _items_ that picture element displays per the <variables>. Take this example, with three sets of items, A, B, and C. You want the 1st group to see the four A items, the 2nd group to see the four B items, and the 3rd one to see the four C items.

<variables>
/ group = (1 of 3) (myitems = aitems)
/ group = (2 of 3) (myitems = bitems)
/ group = (3 of 3) (myitems = citems)
/ groupassignment = groupnumber
</variables>

<block myblock>
/ trials = [1-4 = mytrial]
</block>

<trial mytrial>
/ stimulusframes = [1=mytext]
/ validresponse = (57)
</trial>

<text mytext>
/ items = myitems
</text>

<item aitems>
/ 1 = "A1"
/ 2 = "A2"
/ 3 = "A3"
/ 4 = "A4"
</item>

<item bitems>
/ 1 = "B1"
/ 2 = "B2"
/ 3 = "B3"
/ 4 = "B4"
</item>

<item citems>
/ 1 = "C1"
/ 2 = "C2"
/ 3 = "C3"
/ 4 = "C4"
</item>

It works the same with a <picture> element.

Hello Dave, thanks a lot for your time! It has been really useful but I haven't done it yet, could you please tell me what am I doing wrong? Because when I run it, doesn't matther what group number you write, it shows all of the images: negative, neutral and positive, in this order.

<variables>
/ group = (1 of 3) (item.negativo=negativo)
/ group = (2 of 3) (item.positivo=positivo)
/ group = (3 of 3) (item.neutral=neutral)
/ groupassignment = groupnumber
</variables>

<picture NEG>
/items = negativo
/halign = center
/select = noreplacenorepeat
</picture>

<picture POS>
/items = item.positivo
/halign = center
/select = noreplacenorepeat
</picture>

<picture NEU>
/items = item.neutral
/halign = center
/select = noreplacenorepeat
</picture>

<item negativo>
/1="Negativas\1.jpg"
...
</item>

<item positivo>
/1="Positivas\1.jpg"
...
</item>

<item neutral>
/1="Neutrales\1.jpg"
...
</item>


Probably it's a really dumb and simple mistake, sorry

You can use the <variables> element to do this.

<variables>
/group=(1 of 3) (someitems=negativeitems)
/group=(2 of 3) (someitems=positiveitems)
/group=(3 of 3) (someitems=neutralitems)
/ groupassignment = groupnumber
</variables>

<picture somepicture>
/ items = someitems
...
</picture>

<item negativeitems>
/ 1 = "neg01.jpg"
...
</item>

<item positiveitems>
/ 1 = "pos01.jpg"
...
</item>

<item neutralitems>
/ 1 = "neu01.jpg"
...
</item>