criteria of the psychic
a proposed set of signs or indicators that would allow one to be confident in concluding that an organism possesses consciousness, or that a behavior arises from consciousness as opposed to purely physiological sources. The idea that such criteria could be formulated was proposed by Robert M. Yerkes. Yerkes’s structural criteria were general morphology, neural organization, and neural specialization; his proposed functional criteria were discrimination, modifiability of reaction, and variability of reaction.