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Quasi-experimental (Quasi) with no true IV, high ecological validity
Maguire wanted to see if occupation would affect the size of a person's hippocampus. The main occupation was taxi drivers, as they seem to have better spatial memory.
Maguire scanned the brains of 50 right handed males, aged between 32 and 62 years old.
Positive correlation between years of taxi experience, drivers and hippocampus volume
The aim was to see if the structure of the brain is pre-determined or malleable. Maguire was measuring the volume of the hippocampus
Maguire used 50 brain images from a database as her control and used MRI scans for the participants
The study showed that taxi drivers had a significantly larger volume of their posterior hippocampus compared to non-taxi drivers, who had a larger anterior hippocampus
This was also supported by a previous study concerning rodents.
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