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29 Cards in this Set
- Front
- Back
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Sperry Aim |
to investigate the effects of hemispheric reconnection on perception and memory |
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Sperry Method |
Lab experiment RMD Quasi |
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Sperry Sample |
11 p’s with split brains due to epilepsy |
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Sperry Procedure |
the procedure exposed one or both visual fields to stimuli either tactile, auditory or visual |
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Sperry Results |
-when p’s were shown stimuli in RVF hut then shown the same one in LVF,they claimed to not have seen it before -information presented to RVF could be described in speech and writing, when presented to LVF they said they did not see anything |
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Sperry Conclusions |
-people with split brains have independent perception in each hemisphere as well as memory information taken into left hemisphere is only remembered there. |
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Sperry Evalution |
-both qualitative and quantitative data -highly controlled environment (validity) -low ecological validity -no control group hard to establish cause and effect -good ethics -has practical applications |
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Casey et al. Aim |
to test whether delay of gratification in childhood predicts impulse self control abilities in adulthood |
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Casey Method |
Longitudinal study following p’s from ages 4-40 -2 quasi experiments |
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Casey Sample |
-initial sample cohort of 562 4 year olds swim stanford bing nursery. who completed original delay if gratification task -115 then completed self control scale in 20’s -135 in 30’s -59 experiment 1 27 experiment 2 in 40’s |
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Casey Procedure |
Experiment 1. 32 high delayers 27 low delayers. Hot and cold impulse control task. Completed in P’s own home Go/no go task Hot= happy or neutral expression Cool= neutral expression sex is the stimulus Experiment 2 15 high delayers 11 low delayers P’s received an fMRI scan whisky completing ‘hot’ version of go/no go task |
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Casey Results |
Experiment 1 Both groups highly accurate in responses (high 99.8% low 99.5%). Low delayers slightly more likely to make a mistake Experiment 2 No significant difference found between 2 groups activity in right inferior frontal gyrus |
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Casey Conclusions |
-resistance of temptation as measured originally on 4 year olds can be a stable predictor of future behaviour -contextual factors can affect control e.g: alluring situations |
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Casey Evaluation |
-standardised procedure -high level of reliability -quantitative data -low ecological validity -ethnocentric original sample -useful practical applications -good ethics |
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Blakemoore & Cooper Aim |
to investigate the development of thr primary visual cortex in kittens when exposed to a vertical or horiztonal environment |
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B&C Method |
lab experiment IMD |
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B&C Sample |
2 lab raised kittens, raised in darkness until 2 weeks old 1 in vertical 1 in horizontal environment |
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B&C Procedure |
the kittens were placed in the visial apparatus for 5 hours every day from 2 weeks to 5 months old. the apparatus consisted of a cylinder with either horizontal or vertical black stripes and a glass floor with no edges, the kitten also wore a colour to not be able to see its body after 5 months the kittens were taken into a well lit room a few hours each week to observe their behaviours at 7.5 months the kittens got a brain scan |
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B&C Results |
intially when placed in well lit room kittens were visiually impared; had no startle response,guided by touch and scared of edges. however within 10 hours the kittens regained their visiual abilities. some effects remained like jerky head movements and poor spatial awareness. |
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B&C Conclusions |
brain development is clearly effected by early experiences and environmental factors. evidence of brain plasticity |
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B&C Evaluation |
-highly controlled- internal validity -slighly unethical -very small sample |
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Maguire et al. Aim |
to investigate the volume of the hippocampus in correlation to navigation and spatial memory |
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Maguire et al. Method |
quasi experiment IMD |
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Maguire et al. Sample |
16 london taxi drivers- right handed males aged 32-62 mean age 44 have been licensed taxi drivers for over 1.5 years |
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Maguire et al. Procedure |
an MRI scan of the barins of taxi drivers and control group. used voxel based morphometry (VBM) to measure denisty of hippocampus grey matter and pixel counting to measure the area |
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Maguire et al. Results |
no overall differnece in volume of hippocampus between ps and control group, however differnet in certain regions taxi drivers had an increase in volume in left and right posterior hippocampus |
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Maguire et al. Conclusions |
the brain has plasticity the left and right side of the hippocampus have differnet functions |
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Maguire et al. Evaluation |
- lack of ecological validity - good ethics (MRI scans are not that safe) - androcentric and ethnocentric - quantitative data from scans - high controls |
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Biological area Principles |
all that is psychological is first physiological focuses on genetics and neurochemical explanations of behaviour |
