Evolution of human intelligence: general evaluation

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Psychology unit 3 intelligence revision
Evolution of human intelligence- general evaluation
Bi-pedalism, tool use diet and social group size can influence the evolution
of intelligence as when humans evolved and migrated their environment of
evolutionary adaptiveness will have changed. Therefore it's wrong to say one
factor is responsible for intelligence in humans. The idea that factors
interact is supported by research on primates as frequency of social
learning, tool use and innovation were significantly correlated with size of
frontal lobes.
Social demands may be more important than evolutionary factors-
Dunbar found a positive correlation between social complexity and
neocortex volume but this wasn't found for environmental complexity. This
suggests that social complexity has more influence but it has been suggested
that environmental challenges will still have more important impacts on
intelligence.
Some research groups a whole range of skills together but this may be
wrong as skills of hunting requires a whole range of different abilities
(communication, planning, tool use and co-operation). Research doesn't say
which factor is most important in the evolution of human intelligence.
Experimental evidence isn't possible as explanations are based on major
assumptions. It is unsure the environment of evolutionary adaptiveness is
what researchers assume it is like so some theories can be invalid. Instead
of experimental evidence, they study close relatives such as chimpanzees.
Whilst this provides correlational evidence, we can't assume challenges
facing modern primates are the same as those faced by early humans. The
approach only focuses on behaviours that have adaptive roles at the
exclusion of other factors that might also be significant.

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