Can nonhuman animals use an abstract sense of sameness to perceive relations-between-
relations? This question has been studied over the last 40 years; yet, the extent to which …

Corvids possess cognitive skills, matching those of nonhuman primates. However, how
these species with their small brains achieve such feats remains elusive. Recent studies …

Despite the long, separate evolutionary history of birds and mammals, both lineages
developed a rich behavioral repertoire of remarkably similar executive control generated by …

The present study compares the 'bandwidth of cognition'between crows and primates.
Working memory is the ability to maintain and manipulate information over short periods of …

This article describes an approach for training a variety of species to learn the abstract
concept of same/different, which in turn forms the basis for testing proactive interference and …

It was recently found that not only tool-specialized New Caledonian crows, but also Goffin
cockatoos can manufacture physical objects in accordance with a mental template. That is …

Symmetry and other derived stimulus relations are readily demonstrated in humans in a
variety of experimental preparations. Comparable emergent relations are more difficult to …

The abstract concept of sameness forms the basis of higher-order cognitive operations,
including mathematics and language. Historically believed to be unique to humans …

concept learning in two species of new world corvids, pinyon jays (Gymnorhinus Cyanocephalus)
and California scrub jays (Aphelocoma Californica). © 2021 American Psychological …

Exploration is among one of the most studied of animal personality traits (ie, individual-level
behavioural responses repeatable across time and contexts). However, not all species show …