The field of comparative cognition has undergone rapid expansion, driven by advances in theory, methodology, and cross-species comparison. This special issue was developed in response to a targeted call for papers highlighting the importance of conceptual clarity and methodological rigor in understanding cognitive processes across taxa.
The collection brings together 14 peer-reviewed contributions that collectively illustrate the diversity and maturity of modern comparative cognition research. Topics span a wide phylogenetic range, from single-celled organisms and plants to birds, rodents, canines, nonhuman primates, and humans.
Several papers address foundational conceptual debates, including whether associative learning mechanisms are sufficient to explain complex behaviors or whether alternative representational and cognitive processes must be invoked. Ecological validity and species-specific adaptations are repeatedly emphasized as essential for meaningful cross-species comparisons.
Methodological innovation is a central theme throughout the issue. Contributors introduce novel experimental paradigms, such as adaptive genetic algorithms, hemispheric-specific visual tasks, hide-and-seek memory designs, and trial-unique olfactory matching-to-sample procedures. These approaches aim to isolate cognitive mechanisms while minimizing confounds related to training history or sensory bias.
Memory and learning receive particular attention, with in-depth discussions of episodic-like memory, transitive inference, cumulative cultural evolution, and concept learning. Several papers critically evaluate the criteria used to infer complex cognitive capacities in nonhuman species, highlighting the risks of anthropocentric interpretation.
Canine cognition features prominently through contributions examining spatial cognition challenges and the potential for abstract same–different learning using olfactory stimuli. These studies underscore both the promise and the methodological difficulties of studying cognition in dogs, whose sensory and motivational systems differ markedly from traditional laboratory species.
Taken together, the papers illustrate how progress in comparative cognition depends not only on new data, but on careful alignment between theory, method, and species biology. The editors argue that conceptual precision and innovative design are essential for advancing reliable, generalizable insights into animal minds.
The special issue ultimately positions comparative cognition as a flourishing, integrative discipline, capable of informing broader questions about learning, memory, representation, and the evolutionary roots of intelligence.
Source: Delamater, A., & Wasserman, E. (2021). Comparative cognition: Conceptual and methodological advancements. Journal of Experimental Psychology: Animal Learning and Cognition, published July 1, 2021.
