WAnimal cognitionWAnimal CognitionWBrain-to-body mass ratioWCollective animal behaviorWAnimal consciousnessWConsumer demand tests (animals)WCooperative pulling paradigmWDistraction displayWEffect of psychoactive drugs on animalsWElevated plus mazeWEmotion in animalsWInsect cognitionWInstinctWInterspecies friendshipWAnimal navigationWList of animals by number of neuronsWPreference testWSocial defeatWTheory of mind in animals