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Group: Forum Members
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Hi,
I am working on a visual search task where I display a target word followed by a search scene. I have 2 variables: one called"TargetWord", and the other "TargetImage". Both have two levels, so that there are two possible text words for each scene referred to as Near and Far, and two possible versions of a scene for each target word that I refer to as Present and Absent.
I managed to create lists that tie those stimulus pairs accurately, but I run into a problem that both the Target Word and Target Image are being repeated within a block. They never repeat in the same combination of conditions meaning that for example I end up having 1_NearPresent and again 1_NearAbsent in a block or 1_NearPresent and then 1_FarPresent. I need each stimulus to be seen under one of the combination of conditions only. I played with different "select" options quite a bit and nothing seems to work. I attached a shortened (cut by half) version of the script, but I still used 18 stimuli because I wanted the repetitions to be apparent.
Another thing that I didn't get to yet, but thought it might be worth mentioning now, is that I need to counterbalance the conditions. That is I need to be able to control which of the 4 combination of conditions the stimulus was displayed for participant one, so that the next participants can receive the second, third and fourth combination. What method allows to achieve that?
I would greatly appreciate any help.
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