Evolution of Intelligence Flashcards
evolution of cognition theories
neuroecology
sociality
ecology
technical
language/hunting/fire
null hypothesis
what is neuroecology
study of adaptive variation in cognition and brain size
how ecological presures impact difference sin species, sex cognition and brain
sherry 2006 neurecology
selection and brian organization work together; which is why corivds and food storing behaviour have correlations in brain size
critique of neuroecolog
brodin and bodhuis 2008: retested; found less correlations between brain size and food storing birds; maybe instead:
retrieving does not rely on memory
small sample sizes used and unclear variables (degree of size/storing)
or NE is just wrong!
domain specific vs general intelligence?
bird storing behavior might be ‘task specific’ so not ‘a general intelligence’ mechanisms
mery and kawecik 2003 fly experiment
regardless if learnign abillitiy is used or not- it impacts competitive abillity in FLIES
hofmann 1993 encaphalization
species with large brain/boxy size live longer
species with higeh metabolism live shorter
so mammalian longetivity because encephalization and lowed metabolism
extensive brain hypothesis
large brains= slow growth; slow reproduction and long life span in species
tested by aillo and wheeler + isler/van schaik 2009
ailllo and wheller 1995 brain study
brain to relative gut mass highest in humans=
encephalization quotient (brain to body) increases across primate orrders
isler and van schaik 2009 brain study
expensive brain; so brain size is limited to life history in SOME but not ALL mammals
large mammals= need to produce large offspring= longer childhoods
costs of learge brains
energetic demand
reduce energy for locomoiton digestion and reproduction
strategies to overcome costs of large brains
Polyktokous: reduce number of offspring per litter
Monotonous: reduce reproductive effort over longer time
both; reduce fertillity and live longer
population and brain size correlations
risk of local extinction as population decreases as brain mass increases
how is the population-brain size conundrum fixed
alloparenting (Caring and nursing) to compensante for energetic constraints= leads to social brain hypothesis
social brain hypothesis
DUNBAR: priamtes have unsuaully large brains because of complex social systems
human inntelligence comes from solving social problems (relates to reciprocal altruis, deception and coalition)
neocortex size as proxy measure of intlligence!