Abstract
A common reaction to functional diversity is to group entities into clusters that are functionally similar. I argue here that people are diverse with respect to reasoning-related processes, and that these processes satisfy the basic requirements for evolving entities: they are heritable, mutable, and subject to selective pressures. I propose a metric to quantify functional difference and show how this can be used to place psychological processes into a structure akin to a phylogenetic or evolutionary tree. Three species concepts are repurposed from biology and used to understand relationships in that tree.
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Fost, J. Are there Psychological Species?. Rev.Phil.Psych. 6, 293–315 (2015). https://doi.org/10.1007/s13164-014-0227-y
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DOI: https://doi.org/10.1007/s13164-014-0227-y