Millisecond Forums

If you wanted to do this, you would first have to make Inquisit aware that a file called "cat.png" actually exists and make it available to it as an object:

<block mmyblock>
/ trials = [1=sequence(dog, cat)]
</block>

<item Animal>
/ 1 = "dog.png"
</item>

<picture animal>
/ items = Animal
</picture>

<trial dog>
/ stimulustimes = [0=animal]
/ timeout = 1000
</trial>

<trial cat>
/ ontrialbegin = [setitem(item.Animal,"cat.png",1)]
/ stimulustimes = [0=animal]
/ timeout = 1000
</trial>

<picture dummy>
/ items = myitems
</picture>

<item myitems>
/ 1 = "cat.png"
</item>

However, this approach is both inefficient as well as prone to runtime errors. The proper way to do this is:

<block mmyblock>
/ trials = [1-2=sequence(dog, cat)]
</block>

<values>
/ itemnumber = 1
</values>

<item Animal>
/ 1 = "dog.png"
/ 2 = "cat.png"
</item>

<picture animal>
/ items = Animal
/ select = values.itemnumber
</picture>

<trial dog>
/ ontrialbegin = [values.itemnumber=1]
/ stimulustimes = [0=animal]
/ timeout = 1000
</trial>

<trial cat>
/ ontrialbegin = [values.itemnumber=2]
/ stimulustimes = [0=animal]
/ timeout = 1000
</trial>

Thank you!

Will try this out after the weekend.