London Taxi Drivers - enlarged hippocampi?

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  • Created by: jessie
  • Created on: 04-03-14 20:25
what is the role of the hippocampi?
to facilitate spatial memory
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what is the aim of the experiment?
whether the structure of the brain changes in response to environmental demand , whether structural changes in the hioopcampus can be detected in people with extensive navigation experience
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what approach is this study?
physiological approach
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what is the method and design of the experiment?
natural experiment, independent design, correlational research
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what is the IV of the experiment?
London taxi driver ( brain) or non - taxi driver ( brain)
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what was the the DV of the experiment?
structure and volume of hippocampi
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what was the sample of the experiment?
group 1: 16 right handed male taxi drivers, average age 44, all licensed more than 18 months, average time as a taxi driver 14.3 yrs
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what was the sample of the experiment? (2)
group 2: 16 right handed males, age matched, non - taxi drivers
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what was the procedure of the experiment?
stage 1: MRI scans of brains of 50, healthy, right handed, male, non - taxi drivers aged 33 - 61, analysed to establish comparison database of average hippocampi based on VBM)
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What was the procedure of the experiment? ( 2)
MRI scans of 16 taxi drivers and 16 matched controls were analysed by VBM (Voxel based morphometry) and compared with this database
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what were the controls of the experiment?
the expert conducting the anaylsis did not know whether the MRI scan was of a taxi drivers brain or not
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what were the findings of the experiment ?
there was increased volume of grey matter in both the l+f hippocampi in taxi drivers brains
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what did correlational analysis find?
the volume of the right posteria hippocampus increased as the length of time driving a taxi increased
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what did taxi drivers have more of?
greater volume in the posteria hippocampus but non taxi drivers had more volume in the anterior hippocampus
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what were the ethics of the experiment?
participants applied to be included in the study, fully informed consent was gained
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what is the aim of the experiment?

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whether the structure of the brain changes in response to environmental demand , whether structural changes in the hioopcampus can be detected in people with extensive navigation experience

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what approach is this study?

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what is the method and design of the experiment?

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what is the IV of the experiment?

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