By Yevhen - 9/19/2016
Hi everyone,
We are going to launch the Sexuality IATs relatively soon for our LGBT research project.
I have downloaded the original script file from http://www.millisecond.com/download/library/IAT/. A test logic presupposes to use Images as Target Stimulus and Words as Attributes Stimulus.
However, we might consider an option to use images along with words for Target Stimulus. I have tried to add the <text TargetA/B> tag after the <picture TargetA/B> in Stimulus section, but got this error - "<text targetB> is defined more than once."
It seems that a script interpreter defines the Target stimulus with the same name only ones. Is there a chance I might bypass this issue? A simple logic tells me to add another Text Targets and defines them in Trials section. However, I am a little bit concerned with spoiling test methodology.
Does any one have any thoughts? Or maybe confronted the same issue?
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By Dave - 9/20/2016
Elements of the same *type* must have unique names. Here the type is "stimulus":
Suppose you have
<text a>
...
</text>
and
<picture a>
...
</picture>
with
<trial sometrial>
/ stimulusframes = [1=a]
...
</trial>
How is the trial supposed to know whether you want it to display the <text> or the <picture> element if both have the same name?
As for mixing text and image stimuli in an IAT, the least amount of effort is to simply use <picture> stimuli throughout and simply have images displaying your words: https://www.millisecond.com/forums/Topic12231.aspx?Keywords=picture-and-text-stimuli
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By Dave - 9/20/2016
Another option is to use <list> elements in /stimulusframes to have the target <trial>s display either a <text> or <picture> stimulus. Suppose you have three "target A" image-items and 5 "target A" text-items.
<item targetApics>
/1 = "flower1.jpg"
/2 = "flower2.jpg"
/3 = "flower3.jpg"
</item>
<item targetAtxts>
/1 = "flower text item 1"
/2 = "flower text item 2"
/3 = "flower text item 3"
/4 = "flower text item 4"
/5 = "flower text item 5"
</item>
<picture targetApic>
/ items = targetApics
/ size = (20%, 20%)
</picture>
<text targetAtxt>
/ items = targetAtxts
/ fontstyle = ("Arial", 5%)
/ txcolor = white
</text>
You'd then set up a list like so:
<list targetA>
/ items = (picture.targetApic, picture.targetApic, picture.targetApic,
text.targetAtxt, text.targetAtxt, text.targetAtxt, text.targetAtxt, text.targetAtxt)
/ resetinterval = 1
</list>
and set the target A trials' /stimulusframes to select from that list:
<trial targetAleft>
/ validresponse = ("E", "I")
/ correctresponse = ("E")
/ stimulusframes = [1 = list.targetA]
/ posttrialpause = 250
</trial>
<trial targetAright>
/ validresponse = ("E", "I")
/ correctresponse = ("I")
/ stimulusframes = [1 = list.targetA]
/ posttrialpause = 250
</trial>
(Full example attached).
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