Internal and external factors modulate food-calling in domestic hens A. M. WautersM. A. Richard-YrisM. Foraste Original article Pages: 1 - 10
Error is proportional to distance measured by honeybees: Weber’s law in the odometer K. ChengM. V. SrinivasanS. W. Zhang Original article Pages: 11 - 16
Memory for action events in the bottlenosed dolphin E. Mercado III.Robert K. UyeyamaLouis M. Herman Original article Pages: 17 - 25
Discrimination of multidimensional geometrical figures by chickens: categorization and pattern-learning Christian W. WernerG. Rehkämper Original article Pages: 27 - 40
Rule learning in rats: serial tracking in interleaved patterns S. B. FountainJames D. RowanDon M. Benson Jr. Original article Pages: 41 - 54
Object-goal positioning influences spatial representation in rats R. G. CookT. L. Tauro Original article Pages: 55 - 62