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Maguire et al (2000)
Descripción
A-Levels Psychology Mapa Mental sobre Maguire et al (2000), creado por ItsEmilyMac el 30/05/2013.
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psychology
psychology
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Resumen del Recurso
Maguire et al (2000)
Aim
Determine whether changes could be detected in the brains of humans who have extreme experiences of spatial navigation.
Predicted that any differences in the brains of the taxi-drivers would show up in the hippocampus.
The assumption that the hippocampus has plasticity.
Key Terms
Hippocampus
An area of the brain which appears to be responsible for memory.
Quasi-experiment
The IV varies naturally without being manipulated by the experimenter.
MRI scan
A method that uses radio waves to obtain 3D images of the brain.
Procedure
16 male taxi drivers who had passed 'The Knowledge'.
All right handed
Aged between 32 and 62
Control group were non-taxi drivers
All right handed
Aged between 32 and 62
Quasi-experiment
Analysed MRI scans using pixel counting and voxel based morphology methods
Correlated with the length of time the taxi drivers had been licensed
Findings
The brains of the taxi drivers showed and increase of grey matter in the right and left hippocampus
The control group had greater grey matter volume in the anterior hippocampus
The posterior hippocampus was greater in the taxi drivers
No other differences were found between the groups
Conclusions
The more experienced the taxi driver, the larger the volume of his posterior hippocampus
The hippocampus increases in size over time
Strengths
The data collected is quantitative and was measured with precise equipment
Should be reliable and not subjected to any biases
The scans are safe, painless and non-invasive
Weaknesses
Differences between groups could be due to some other factors
Differing experiences of the two groups could affect differences in the results.
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