"Psychology Sets" for kids--why stop with Chemistry?

Remember the old Chemistry sets? They once actually came with corrosive and explosive powders that allowed many kids to discover and destroy. Now, they are a bit toned down. We were looking to get our daughter a microscope and Grandma gave her one with one of these new chemistry sets, too. Beware the wonders and danger of .... gelatin. It's a start. Some of the experiments are pretty time-consuming for a kindergartener.

One evening she was asking to do one of these "spare-a-mints" (it is hard to correct pronunciation when it is that cute) but it was too close to bedtime to complete one. Then it occurred to me that she could do a small version of a "daddy experiment" and still get to bed on time. The Psychology Set! I made a quick, cartoon version of four different instances of visual search, based on Anne Treisman's seminal work from 1980. The target was always the same, a red X. Here it is, outlined in yellow.




The only thing that changes are the nontargets, or distractors. The other two letters are the types of nontargets she saw. The first is the blue X, and the other is a red O. So her job was (and now your job is!) to find the red X. To emulate her experience keep a clock nearby and see how many seconds it takes. (If you do not find the target after awhile, you are allowed to stop looking.) Ready? Go!




Found it? Good. Now look for it again here:




OK, that was a bit tricky. No target there. Try again here:





Found it again? One last time, where is it here:




All done! Afterwards I plotted Isabella's data (averaged across two attempts at each trial type) like this:




When the red X is the uniquely colored item it can be found quickly. When it is absent, it takes a bit longer to check and make sure it is not there. However, when there are also a bunch of red Os present, one has to look for the combination (or, conjunction) of red and X to find the target because there are other red items and other Xs, but only one red X. That takes a bit longer. It takes even longer when it is absent because it is harder to make sure it is not there when there are both other Xs and other red things there.

Isabella immediately took up the idea that it was easier for her brain to find the only red thing and harder when it was not there and when there were other red things to "trick" her--she at first pointed at several red Os before finding the red X. (A nice example of searching through just one subset of the nontargets...) And she wanted to keep searching again and again, like a homemade "Where's Waldo" (or, one German version (I think there is another one, too), "Wo ist Walter"). It's nice that she is actually interested in what I did for my dissertation!

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