Evolution of cognition
The evolution of cognition is the process by which
Methods of study
Studying the evolution of cognition is accomplished through a comparative cognitive approach[1][2][3] where a cognitive ability and comparing it between closely related species and distantly related species. For example, a researcher may want to analyze the connection between spatial memory and food caching behavior. By examining two closely related animals (chickadees and jays) and/or two distantly related animals (jays and chipmunks), hypotheses could be generated about when and how this cognitive ability evolved. Another way cognition has been studied in animals, specifically insects, is through a cognitive test battery. This method measures "intelligence directly with a battery of cognitive tests rather than relying on proxies like relative brain size."[4]
Animals with high levels of cognition
Higher cognitive processes have evolved in many closely and distantly related animals. Some of these examples are considered convergent evolution, while others most likely shared a common ancestor that possessed higher cognitive function. For example, apes, humans, and cetaceans most likely had a common ancestor with high levels of cognition, and as these species diverged they all possessed this trait. Corvids (the crow family) and apes show similar cognitive abilities in some areas such as tool use. This ability is most likely an example of convergent evolution, due to their distant relatedness.
- Mammals
- Cetaceans (dolphins and orcas) have shown higher levels of cognition including: problem solving, tool use, and self recognition.[8]
- Hyenas live in highly cognitive social groups. Hyenas have also demonstrated the behavior of feigning death to avoid conflicts with predators.[9]
- Canids have shown high level cognitive abilities such as: object permanence, social learning, and episodic memory.[11]
- Elephants display many high cognitive behaviors, including those associated with grief, learning, mimicry, play, altruism, tool use, compassion, cooperation,[12]
- Birds
- Parrots have displayed cognitive functions such as: tool use, problem solving, and mimicry of human speech.[15]
Selection favoring cognition
Social living
Sex, mating, and relationships
Many animals have complex mating rituals require higher levels of cognition to evaluate.[3] Birds are well known for their intense mating displays including swan dances that can last hours or even days.[18] There has also been studies on sexual selection and evolution of cognition in seed beetles. It shows that "cognitive ability did show sex-specificity: strong sexual selection improved cognitive ability for males but not females."[19]
Higher levels of cognition may have evolved to facilitate the formation of longer lasting relationships. Animals that form pair bonds and share parental responsibilities produce offspring that are more likely to survive and reproduce, which increases the fitness of these individuals. The cognitive requirements for this type of mating include the ability the differentiate individuals from their group and resolve social conflicts.[17]
Finding, extracting, and protecting food
Another hypothesis for the evolution of cognition is that cognition allowed individuals access to food and resources that were previously unavailable. For example, the
Technology, tools, innovation, and culture
The cognitive ability to use
Some animals have demonstrated the ability to pass information from one generation to the next (culture) including: primates, cetaceans, and birds.
See also
- Animal Cognition
- Anthropomorphism
- Bird intelligence
- Cetacean intelligence
- Cephalopod intelligence
- Deception in animals
- Dog intelligence
- Fish intelligence
- Human-animal communication
- Theory of mind in animals
- g factor in non-humans
References
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- ^ Meades, Sian (2016-04-18). "These birds have the most INCREDIBLE mating ritual that lasts FIVE days". Express.co.uk. Retrieved 2018-03-26.
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- ^ K, Alfred. "Monkeys Washing Potatoes | Alfred K". alfre.dk. Retrieved 2018-03-26.