We present a set of tools to elicit subjective perceptions of the complexity of a variety of choice problems that have been thoroughly studied in economics. Our object of interest is the mapping from the description of a problem to the distribution of subjective perceptions of its complexity, and then the mapping of such perceptions to choices. We find that, in general, different problems are perceived differently by the people who engage in them, which, in turn, induces different distributions over behaviour.
Depending on the task, we find that aggregate results, established in the literature, might reflect the behaviour of only a subset of these perception classes and, therefore, the specific distribution over perception classes has a strong effect on what average or aggregate behaviour is found to be.
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