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maguire et al
study
15
Psychology
11th Grade
05/17/2014

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Cards

Term
what was the sample?
Definition
16 right-handed male taxi drivers and 16 right-handed male non-taxi drivers - age matched - avg age 44, liscensed for at least 18 months
Term
what was the aim?
Definition
to investigate whether environmental demands could effect the structure of the brain; if spatial navigation effects the volume of taxi-drivers hippocampi
Term
what was the method and the IV and DV?
Definition

natural experiment 

IV: taxi driver or non-taxi driver

DV:structure and volume of hippocampi

Term
name the control in the procedure?
Definition
the researcher conducting analysis was unaware of whether the MRI scans were from taxi drivers or not - single blind
Term
what was the comparison data base?
Definition
MRI scans of 50 righthanded, healthy male non-taxi drivers were analysed to establish data base of 'average hippocampi'
Term
how were the brain scans analysed?
Definition
voxel based morphometry and pixel counting
Term
what is an MRI scan?
Definition
uses radio waves to obtain 3D picture of the brain
Term
what was correlated?
Definition
the volume of the posterior hippocampus and time spent as taxi driver
Term
what did voxel based morphology show in taxi drivers?
Definition
increased volume of grey matter in both left and right hippocmapi of taxi drivers
Term
what did pixel counting show?
Definition
no significant difference between the overall volume of hippocampus between taxi and non-taxi drivers
Term
what were the regional differences?
Definition
the posterior hippocampus was greater in the taxi-drivers, whereas the anterior hippocampi was greater in the non-taxi drivers
Term
what do the results indicate?
Definition
redistribution of grey matter in the hippocami
Term
what did the correlation show?
Definition
the right posterior hippocampi increased as the time spent as a taxi driver increased - positive correlation
Term
what was the main conclusion?
Definition
the structure of the brain changes in response to environmental demands
Term
what do the conclusions have implications for?
Definition
normal activity can induce changes in the brain so rehabilitation after brain injury
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