Generally speaking, the larger a mammal's brain, the greater its tendency to play, according to a 2001 Journal of Comparative Psychology study that correlated play with relative brain size across 15 orders, from Rodentia to Primates. (discovermagazine.com)
In college, she took an animal - behavior class and had an epiphany: «Most people in comparative psychology compare humans and other primates,» she observes, which leaves the field wide open for studies of mollusk behavior and cognition. (discovermagazine.com)
Brunner, D., Balci, F., and Ludvig, E. A. Comparative psychology and the grand challenge of drug discovery in psychiatry and neurodegeneration, Behav Processes 2011 89, 187 - 195 (psychogenics.com)