the role of environmental factors in intelligence test performance

HideShow resource information
Preview of the role of environmental factors in intelligence test performance

First 451 words of the document:

Psychology unit 3 intelligence revision
Environmental factors in intelligence test performance
Description- social economic status
It has been found that your social economic status has a small impact on your
intelligence as there is only an increase of 10 IQ points between lower class and
upper class. However, the reasons for this difference could be that upper class
children get better education so they develop a better crystallised intelligence
due to higher efforts, more resources and better education. This aids the
development of a good frontal lobe resulting in more neurons making connections
and increasing IQ.
Evaluation- Kishiyama
Found that poorer children had lower prefrontal cortex activation when
responding to novel stimuli. This suggests that people from lower classes have
poorer frontal lobe development so they make fewer connections. This shows that
you need to be from a upper class background to be able to develop a good frontal
lobe and make more connections. This supports the theory of social economic
status although the evidence suggests a larger impact of social economic status on
IQ than the theory suggests
Description- birth order
As family size increases, the average IQ of the family decreases. First born
children tend to be more verbally articulate, less implusive, more active, better
performers at school, more likely to go to college and have greater motivation.
They also score higher on IQ tests than later born siblings. This could be because
a first born child would have been brought up with 2 adults whilst the second born
child would also be brought up with another child so the first born child will have
received more attention than the second born child. Also the first born child will
have grown up in an adult environment so will have learnt more adult behaviours
than the second born child.
Belmont and Marolla gave 350,000 Dutch males a raven test which is similar to an
IQ test. They found a strong correlation between birth order and scores on the
raven test. The score decreased as family size increased and declined with birth
order. This shows that birth order can affect IQ scores.
Blake found that birth order had no effect upon how far children progressed
through education. Some research had shown that second born children are more
successful over a lifetime in terms of career success and financial wealth. This
suggests that first born siblings are more academic but second born children are
more practical as they need to adapt to seek attention. This provides

Other pages in this set

Page 2

Preview of page 2

Here's a taster:

Psychology unit 3 intelligence revision
contradictory evidence and undermines the idea that first born children are the
most successful.
Description- education
It has been suggested that for every year of education, a person's intelligence
improves by 2.5 IQ points.
Evaluation- Murray and Hernstein
Found that education does have an effect on IQ scores as they thought it should
increase IQ by 2-4 IQ points. This supports the idea that education has some
impact on IQ scores.…read more


No comments have yet been made

Similar Psychology resources:

See all Psychology resources »See all resources »