Biopsychology Flashcards
what did Duffy discover
There are individual differences in peoples’ sleep-wake cycles, which is accompanied by differences in other circadian rhythms such as body temperature.
What was McClintock’s study? ultradian rhythms
- used pheromones of a group of women and applied them to another group of women.
-68% of them experienced changes to their cycle, bringing them closer to their donor.
What was Kuhn’s study? support for plasticity
+Lab experiment - able to randomly allocate pps and manipulate IV
G1 played Mario for 30mins a day for 2 months
G2 didn’t play video games (control group)
Scanned brains before and after experiment
G1 had increased brain vol (spatial, movement, planning)
Supports plasticity e.g rewiring
What was Siffre’s study?
Case study investigating effects of light on sleep wake cycle
no exogenous zeitgebers for 6 months in a cave
Has access to artificial light from torch
Found that sleep wake cycle extended 25-30 hours
Aschoff and Weber’s study?
Group of pps in bunker w no exogenous zeitgebers
Sleep wake cycle lengthened.
Had artificial light (limitation as could help to reset their body clocks)
What was Dejernes study into (limitation of) localisation-connections
Patient difficulty understanding written words
suggests damage to wernickes area
found damage to neuronal connection between visual cortex + wernickes area.
suggests localisation theory ignores importance of connections
What was Bavelier’s study into brain localisation - Indiv diffs
Individual differences are ignored in localisation theory.
pps performed reading task whilst bavelier recorded brain activity using brain imaging
results showed that pps used slightly diff parts of brains
What was Dronker’s study about localisation
Some tasks may be too complex to localise to one specific area
performed brain scan on tan and similar patients
had damage to other parts of brain as well as brocas area.
couldve contributed to brocas aphasia
What did Lashley’s experiment involve and show?
tested the importance of brain regions on rats
found that no one part was more important than another in the rats ability to navigate the maze
-EQUIPOTENTIALITY THEORY - in tact areas opf brain can take over functions lost by damaged parts of the brain.
Maguire’s study of plasticity
Taxi dirvers larger hippocampus than avg. -> more time spent, larger (correlation)
quasi study (can’t manipulate IV - pp variables)
Elbert’s study evaluation of brain plasticity
Age is a limiting factor - younger people greater capacity for neural reorganisation
What is the equpiotentiality theory
Function of damaged region replaced by nearby regions
Support for equipotentiality theory - Danelli, case of EB
Case study EB by Danelli
LH removed lost language skills, RH took over after many years - Danelli compared w MRI
What is Hemispheric lateralisation
Each half of brain has different functions
Sperry’s research
Split brain patients - no corpus callosum
Presented object to one hemisphere
Ability to identify not Hem Lateralised
Could describe when presented to LH - language lateralised here
