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In the following experiment, you will be presented with a sequence
of images of faces. The faces will either be happy or sad, or they
will be chimeric. Chimeric faces or those in which one half
is sad and the other is happy. In each trial the image will flash
for a very brief duration (around 200 milliseconds). You will respond
by hitting the 's' key for sad or hitting the 'h' key for happy.
There will be two blocks of 20 trials per block. Once you observe
(and record) the data, you might want to try running the experiment again.
You may find that your data reveal a bias effect in which your response
to stimuli favor either the right side or the left side. What has
happened in such a situation is that, in those cases where the two sides
of the face were contradictory (i.e. "chimeric"), you were more readily
swayed to make your judgement of happy or sad, based on which expression
appeared on your favored side. If you favor the right side, for instance,
you might be inclined to see a chimeric face as happy, when the right side
of that chimeric face is indeed happy.
If this is the first time that you are running the experiment, you will
need to download some image files
to your computer. If you haven't already done so, you will also need
the plugin. Once you have downloaded the plugin you will be able
to run many other experiments on IPL with few or no additional downloads
After the two blocks of trials, the data will be displayed.