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Biopsychology
Hemispheric Lateralisation & Split Brain Research
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Cards (18)
What is
hemispheric lateralisation
?
It is the idea that the
left
and
right
hemispheres of the brain are responsible for different functions.
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What are the different functions of the left
hemisphere
?
The left hemisphere controls
speech
,
language
,
comprehension
,
analysis
,
calculations
, time,
sequencing
, and
recognition
of words, letters, and numbers.
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What does the
left hemisphere
receive information from?
The left hemisphere receives information from the
right-hand
side of the body and the
right visual field
.
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What are the
functions
of the right
hemisphere
?
The right hemisphere controls creativity, spatial ability,
context/perception
, and recognition of
faces
,
places
, and
objects
.
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What does the
right hemisphere
receive information from?
The right hemisphere receives information from the
left-hand
side of the body and the
left visual field
.
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What is
split brain research
?
Split brain research involves studying patients who have had surgery to cut the
corpus callosum
, which connects the two
hemispheres
of the brain.
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What is the aim of
split brain
research?
The aim is to investigate the effects of severing the connection between the two
hemispheres
of the brain on functioning.
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How many participants were studied in
Sperry's
split brain research?
11
individuals who had their
corpus callosum
severed due to surgery.
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What was the procedure in
Sperry's
split brain
research?
Participants sat in front of a screen and were presented with visual information to either their right or left eye for
1/10th
of a second.
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What were the results of the
visual
presentation of information in
Sperry's
research?
Objects seen in the right visual field could be named verbally, while objects seen in the left visual field could only be
identified
by pointing.
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What conclusion can be drawn from
Sperry's
research?
The two
hemispheres
of the brain have different
abilities
and
functions
; only the
left hemisphere
can produce
language
.
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What is a weakness of
split brain
research regarding individual differences?
The degree of
hemispheric lateralisation
varies among
participants
, affecting the measurement of lateralisation.
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What is a weakness of
split brain
research related to
sample bias
?
Only
11
split brain patients participated, all with a history of
epileptic seizures
, which may have influenced the findings.
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What is a strength of the research into
hemispheric lateralisation
?
It uses
scientific methods
based on objective and
empirical techniques
in controlled laboratory settings.
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What does the case study of patient
EB
suggest about
hemispheric lateralisation
?
It suggests that language ability may be present in more areas than just the
left hemisphere
.
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What are the key functions of the left and right
hemispheres
of the brain?
Left Hemisphere
:
Speech
,
language
, and
comprehension
Analysis
and
calculations
Time
and
sequencing
Recognition
of words, letters, and numbers
Right Hemisphere
:
Creativity
Spatial
ability
Context
/
perception
Recognition of faces, places, and objects
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What are the strengths and weaknesses of
split brain research
?
Strengths:
Uses
scientific methods
Based on
objective
and
empirical
techniques
Weaknesses:
Individual differences
in
lateralisation
Sample bias with only
11
patients
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What is the significance of the
corpus callosum
in split brain research?
Connects the two
hemispheres
of the brain
Its
severing
leads to functional separation of the hemispheres
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