Before revision: Heuristics in numerical cognition Comparative studies A variety of research has demonstrated that non-human animals, including rats, lions and various species of primates have an approximate sense of number (referred to as "numerosity") (for a review, see ) .
After revision: Heuristics in numerical cognition Comparative studies A variety of research has demonstrated that non-human animals, including rats, lions and various species of primates have an approximate sense of number (referred to as "numerosity") .