Abstract

Comparative research assessing metacognition in nonhuman animals contributes to the question of what form introspection could take in humans, non-humans, and other possibly conscious systems. We briefly review some major findings in comparative metacognition research, including some discoveries in areas looking at self-regulation and self-control. We discuss what data exist to address the three conditions for introspection defined by Kammerer and Frankish (this issue) in their target article. We suggest that two of three conditions are met by existing data from non-human primates, and that the third condition may be more difficult, but perhaps not impossible, to assess. We argue that a comparative and developmental approach to this question of how to define and measure introspection is a productive avenue to make progress in this area.