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There is at least one study that shows that older people exhibit poorer performance in point-and-click tasks on the computer than young adults. The experimenters then made use of the Delboeuf illusion to observe the effects on the performance of the older participants. It turns out that the participants were overestimating the size of the target by about 8-12% with various configurations. The interesting bit is that both the older and younger participants had similarly overestimated the targets. No matter your age, you are just as susceptible to perceptual manipulations such as the Delboeuf illusion.

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