Chapter 2: Internal
Systems |
Contents:
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Introduction
Function of bio
psychological processes and systems

Steps
Parallel steps
Take closer
look Brain work

Automatic and autonomic
In practical sense
 |
Referring to
Figure 2.1 we can
observe once more the function of bio psychological
processes and systems as they occur within human thinking
and problem‑solving processes ‑ yet another homologous
system. The sequence of functions in the stream of
consciousness that accompanies mental processing of a
“problem” is represented by the same steps living organisms
follow:
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a.
Searching
for available knowledge and information.
b.
Analyzing,
breaking down, and digesting the data.
c.
Manipulating
that information through imagination into new
synthesis, into a hypothesis or idea.
d.
Internally projecting
the use of the idea.
e.
Evaluating
the solutions for their "fitness," that is, their
potential effect and value and the probable feedback
that will be received. |
Once this internal system has processed a problem to our
satisfaction, we put it into the primary growth system and
try it out in the external world.
Although we do not know the details of all the internal
processes of the cell, we can speculate that this creative
internalization confers to the activities of Man a unique
advantage ‑ being able to submit a wide variety of growth
alternatives to an internalized simulation of evolutionary
natural selection process before actually applying it in the
real world.
Although we have so far considered the process by which the
ectogenetic system of Man came about and how it operates,
some of the parallel steps in the growing organization of
information may indeed have created a reconstructed system
even more fundamental than the ectogenes or culture. Because
the primary mechanism of biologic endogenetic information
accumulation has always occurred by creating mutated
nucleotide codes and testing their fitness through natural
selection, it is reasonable to imagine that both the
external replication of the system through Man's tools and
ideas, and the internal structure of the human system
operate in an identical way. Man's brain may be, in fact, a
miniature evolutionary laboratory.
To take a closer look at this concept,
imagine that the brain is a colony consisting of 12
billion cells or so. If an "idea" is formed in the
mind, it can actually represent the rearrangement, addition,
or subtraction of codes among neurons. The neuron does not
duplicate itself in the usual way, however. Its propagation
and self ‑verification come about when it is subjected to
the environment made up of the other brain cells. The
nuclear data making up the coded pattern of these cells are
the facts, opinions, and perceptions of the external
environment, a condensed replica of that believed world. It
may very well be that, like the transfer of DNA in
such operations as temperate phase transduction, the idea
attempts to grow in the "culture" by transmitting its code
to other cells. In this process it encounters normal
environment pressures. If it fits, it is allowed to grow and
affect many parts of the brain. Thus, by successfully
propagating in the replica culture, it has been "pretested;"
it can change, mutate, and even die within the cerebral
system without incurring any gross biologic waste. The brain
and the process of thinking may be, in effect, a miniature,
accelerated, and magnificently more efficient evolutionary
instrument ‑ in quite real organic and biologic terms.
As an automatic and autonomic “laboratory" of testing
reality, the enigma of the unconscious state of dreaming can
also be explored within the conceptual framework of
transformation.
Although we may temporarily sever the connection of our link
with external reality in sleep, the process of mutation and
selection continues. Deprived of external effect and
feedback, however, the brain may react unconsciously in the
same way that consciousness operates in sensory‑deprivation
experiments. After a period of no perception and feedback,
even while fully awake, a person will begin to fantasize and
hallucinate. The unconscious, while it is attempting to
perform normal "problem‑solving" or what can be seen as
evolutionary activity, may be greatly affected by loss of
connection with the outside world.
In a practical sense,
by applying individual experience each of us can observe
the evolution, mutation, and selection processes as they go
on in our own minds at any time. The process which
Ainsworth-land calls
imagination generates mutations with “novelty and
diversity”; the function of natural selection or “judgment”
is observed as the pressure of facts buffets an idea,
allowing it to grow or die inside the mind. |
2.1 Thinking

Components

Defined
problem

Undefined
problem
Handling
well-defined problems
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2.1
Thinking
Thinking
most generally, any covert cognitive or mental
manipulation of ideas, images, symbols, words, propositions,
memories, concepts, precepts, beliefs or intentions. In
short, it is a term used so that it encompasses all of the
mental activities associated with concept‑formation,
problem‑solving, intellectual functioning, creativity,
complex learning memory, symbolic processing, image; etc.
These terms in psychology cast such a broad net and few
encompass such a rich array of connotations and entailments.
Certain components
nonetheless lie at the core of all usages: (a) Thinking
is reserved for symbolic processes; the term is not used
for behaviours explicable by more modest processes such as
that of rats learning a simple maze. (b) Thinking is
treated as a covert or implicit process that is not
directly observable. The existence of a thought process is
inferred either from reports of the one who was doing the
thinking or by observing behavioural acts that suggest that
thinking was going on, e.g., a complex problem solved
correctly. (c) Thinking is generally assumed to involve
the manipulation of some, in theory identifiable,
elements. Exactly what these "elements of thought” are
anybody's (and sometimes it seems, everybody's) guess.
Various theorists have proposed muscular components
(Watson), words or language components (Whorf),
ideas (Locke), images (Titchener),
propositions (Anderson), operations and concepts
(Piaget), scripts (Schank) and so forth. Note
that some of these hypothesized entities are quite elemental
and others are quite holistic. No matter, all are serious
proposals and all have at least some evidence to support
their use in the process of thinking.
Because of the breadth and looseness of the term,
qualifiers are often used to delimit the form of thinking
under discussion. Some of these specialized terms
follow; others are found under the alphabetic listing of the
qualifying term.
Characterizing Thinking
 |
2.1.1 Characterizing Thinking
The term "thinking"
will be taken as referring to a set of processes
whereby people assemble, use and revise internal
symbolic models. These models may be intended to
represent reality (as in science) or conceivable
reality (as in fiction) or even be quite abstract
with no particular interpretation intended (as in
music or pure mathematics). Here, we will be mainly
concerned with the first case, which is typical in
problem ‑solving. Thinking directed toward
problem‑solving may be regarded as exploring a
symbolic model of the task to determine a course of
action that should be the best (or at least be
satisfactory). A symbolic model often enables the
thinker to go far beyond the perceptually available
information and to anticipate the outcomes of
alternative actions without costly overt trial and
error.
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Characterizing Problems
 |
2.1.2 Characterizing Problems
Given the strong
emphasis on problem‑solving in this context and in
the general literature on thinking, the question
arises "what is a problem?" The definition
offered by the Gestalt psychologist Karl
Dunker is still serviceable. He wrote that "a
problem arises when a living organism has a goal but
does not know how this goal is to be reached". |
This is a useful initial formulation that signals a number
of points. First,
that a "task" set by an experimenter is not necessarily a
problem for a given individual. Whether it is a problem or
not, depends on the subject's knowledge and on his ability
to locate relevant knowledge, should he have it? Second,
a problem may vanish or be dissolved if the person changes
his goals. A third point is that a problem does not
effectively exist until the person detects some discrepancy
between his goals and the situation he finds himself in.
Most psychological studies of problem‑solving (especially,
as we shall see, those within the information processing
framework) have dealt with well defined problems. If we
accept Rittman's useful proposal that problems in
general can be viewed as having 3 components (viz. a
starting state, a goal state and a set of processes that may
be used to reach the goal from the starting state) then
a problem is well defined if all 3 components are completely
specified. Problems in mathematics, in logic and in various
board games tend to be well defined. Although well
defined, such problems can be very difficult and the
psychologist is faced with the task of explaining how we
humans, with our various limitations, manage to solve
geometry, chess and similar scale problems in reasonable
time. Of course, it will be still more difficult to explain
how we tackle those ill‑defined problems that are more
typical of real life than the well‑defined variety.
Undefined problems leave one or more components
of the problem statement vague and unspecified. Problems can
vary in degree of defineness an animal.
It seems a reasonable strategy for psychologists to start
with people's ways of handling apparently well‑defined
problems and then move on to consider ill‑defined tasks.
Perhaps people tackle ill‑defined tasks by seeking a
well‑defined version of the problem, which they then work
within until the problem is solved or a new definition is
tried. If this is so, then studies with well‑defined
problems will be relevant to part of the process of solving
ill‑defined problems. Indeed, processes of defining, or
interpreting, the problem are also important in well‑defined
tasks and some attention has recently been given to task
interpretation processes that must play a role in both well‑
and ill‑defined tasks.
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ý
2.2 Thinking as
a Skill

intelligence
like a horsepower of a car

intelligence a
potential gift
 |
You
have two choices; as De Bono Says:
1. A matter of intelligence |
Thinking is a matter of intelligence.
Intelligence is determined by the genes with which
you were born. You can no more change your thinking
than you can truly change the color of your eyes. |
2. Can be improved by training |
Thinking is a skill that can be improved by
training, by practice and through learning how to do
it better.
Thinking is no different from any other skill and we
can get better at the skill of thinking if we have
the will to do so. |
These two opposing views can be combined rather simply.
Intelligence is like the horsepower of a car.
It is possible that the “intelligence” potential of the mind
is determined, at least in part, by our genes. Even so there
is evidence that the use of the mind can change the enzyme
characteristics just as the use of muscles can change their
characteristics.
The performance of a car does not depend on the horsepower of
the car but upon the skill with which the car is driven by
the driver.
So if intelligence is the horsepower of the car, then
“thinking” is the skill with which that horsepower is used.
Intelligence is a potential gift.
Thinking is an operating skill. Thinking is the operating
skill through which intelligence acts upon experience.
If we pursue the car analogy a little further then we come to two
important conclusions:
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1.
If you have a powerful car then you need to
improve your driving skills. If you do not
improve your driving skills then you will not be
able to make full use of the available power. You
may also be a danger to others.
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2.
If you have a less powerful car then you need to
develop a high degree of driving skill in order
to make up for the lack of power. |
So those who do not consider themselves to be highly intelligent can
improve their performance by improving their thinking skill.
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ý
2.3 Critical
Thinkingý

Kritikos means
judge


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ý2.3 Critical
Thinkingý
There are a few schools that do have “critical thinking” on the
curriculum. Critical thinking is a valuable part of
thinking but totally inadequate on its own. It is like the
left front wheel on a car: wonderful in itself but
inadequate by itself.
Critical thinking perpetuates the old-fashioned view of
thinking
established by the Greek Gang of Three (Socrates, Plato
and Aristotle). This view is that analysis, judgment and
argument are enough. It is enough to “find the truth” and
all else will follow. If you remove the “untruth” then that
is enough.
“Critical” comes from the Greek word “kritikos”, which means
judge. While judgment thinking has its place and its
value it lacks generative, productive, creative and design
aspects of thinking that are so vital. Six brilliantly
trained critical thinkers sitting around a table cannot get
going until someone actually puts forward a constructive
proposal. This can then be criticized by all.
Many of the present problems around the world persist because traditional
education has mistakenly believed that analysis, judgment
and argument are enough.
Our success in science and technology comes not from critical
thinking but from the “possibility” system.
The possibility system moves ahead of our information to
create hypotheses and visions. These give us a framework
through which to look at things and also something to work
towards. Critical thinking does have a part to play because
if you know your hypothesis is going to be criticized then
you seek to make it stronger. But critical destruction of
one hypothesis has never produced a better one. It is
creativity that produces the better hypothesis.
Culturally, we desperately need to break loose of the notion that
critical thinking is sufficient. While we believe this
we shall never pay sufficient attention to the creative,
constructive and design aspects of thinking.
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ý
2.4 Lateral Thinkingý

Mathematical
thinking
Types
of problem

Require
processing of available
Problem of no
problems
Solved by
re-structuring of information
Lateral Thinking






Alternatives

Non-sequential

Quota

Rotation of Attention

Reversal

Cross-fertilization

Conclusions

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2.4
Lateral Thinking
The
purpose of lateral thinking is to counteract both the
errors and the limitations of the special memory‑surface.
The errors may lead to incorrect use of information. The
limitations may prevent the best use of information that is
already available. Natural thinking has all the errors of
the special memory‑surface. Logical thinking is used to
avoid the errors of natural thinking, but it is limited in
that it cannot generate new ideas that make the best use of
information already available.
Mathematical
thinking avoids the errors of natural thinking by setting up
an information processing system that is distinct from the
memory‑surface. The limitation of mathematical thinking
is that it is only a second stage system which is used to
make the most of what has been chosen by the memory‑surface
in the first stage. None of these three types of thinking
can get completely beyond the limitations of the
memory‑surface, though two of them can reduce the actual
errors to a considerable extent.
A
problem is simply the difference between what one has and
what one wants.
Since a problem has a starting‑point and an end point, then
the change from one to the other by means of thinking is a
direct indication of the usefulness of that thinking.
Types of
Problems
There are three basic types
of problems:
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1.Problems that require the processing of
available information or the collection of more
information. |
|
2.The problem of no problem; where the acceptance
of an adequate state of affairs precludes
consideration of a change to a better state. |
|
3.Problems
that are solved by re‑structuring of the information
that has already been processed into a pattern. |
The
first type of problem can be tackled with logical
thinking, or mathematical thinking, or the collecting of
more information. The other two types of problem require
lateral thinking.
Most
of the time the established patterns on the special memory
surface are improved only by information which comes in from
outside. It is a matter of addition or gradual modification.
Lateral thinking is
more concerned with making the best possible use of
the information that is already available on the
surface than with new information, see
Figure 2.2. |
Lateral thinking is concerned with compensating for the
deficiencies of the special memory‑surface as an
information‑processing device.
Lateral thinking has to do with rearranging available
information so that it is snapped out of the established
pattern and forms a new and better pattern. This
rearrangement has the same effect as insight. The
established patterns which determine the flow of thought can
be changed by lateral thinking, as can the established
patterns which control how things are looked at.
The memory‑surface itself, natural thinking, logical
thinking and mathematical thinking are all selective
processes. The
memory surface selects what it will pay attention to.
Natural thinking selects a pathway according to emphasis.
Logical thinking blocks pathways according to the mismatch
reaction. Mathematical thinking uses the rules of the game
to select possible changes. The only generative process
involved is the chance arrangement of information in the
environment.
A
baby crying is a generative situation.
The baby just makes a noise and then things happen. From all
the things that happen, the baby accepts the ones that are
useful to it. Lateral thinking is a generative process.
Instead of waiting for the environment to change established
patterns, these are deliberately disrupted in various ways
so that the information can come together in new ways. If
any of these new ways are useful, then they can be selected
out by any of the selecting processes.
In
the early days of photography, the photographer used to
go to a great deal of trouble to arrange the background, the
lighting, the pose, the smile, and then when everything was
just right he took the photograph. Nowadays the
photographer just takes dozens of pictures from different
angles with different expressions and different lightings.
Then he develops all the pictures and picks out the ones
that look best. In the first case the selection is done
before the photograph is taken, in the second case it is
done after the photographs have been taken. The first method
will only produce what is known beforehand and planned. But
the second method may produce something new that was totally
unexpected and could never have been planned.
With the other types of thinking you know what you are
looking for.
With lateral thinking you may not know what you are looking
for until after you have found it. Lateral thinking is like
the second method of taking photographs, and the other sorts
of thinking are like the first method. For convenience these
other sorts can be included under the heading of vertical
thinking which is the sequential development of a particular
pattern ‑ like digging the same hole deeper. With vertical
thinking one moves only if there is a direction in which to
move. With lateral thinking, one moves in order to generate
a direction.
The generative effect of lateral thinking is exerted in two
ways. The
first way is to counteract, restrain or delay the fierce
selective processes of the memory‑surface itself. It is
also necessary to counteract the selective processes that
have been artificially developed, such as logical thinking
with its heightened sensitivity to a mismatch. The second
way is to bring about deliberate arrangements and
juxtapositions of information that might never otherwise
have occurred. The aim of both these processes is to
allow information to arrange itself in new and better
patterns, as happens in insight.
The
nature of lateral thinking may be illustrated by outlining a
few specific points of difference from vertical thinking.
Alternatives
The special memory‑surface is a self‑maximizing system.
The tendency of such a system is to select the most obvious
approach provided this is adequate. In an experiment, a
group of children were each given two small wooden boards.
There was a hole in the end of each board, and the children
were also given a piece of string. The task was to cross the
room as if it were a river by somehow using the boards so
that no part of the body touched the ground. Because there
were two boards and they had two feet the children soon hit
on the idea of using the boards as stepping stones. They
stood on one board and moved the other ahead and then
stepped on that and moved the first board ahead. This was an
effective way of getting across the room.
A
second group of children
were only given one of the boards and the piece of string.
After a while a few of them tied the string to the hole in
the board. Then they stood on the board and holding it up
against their feet with the string they hopped across the
room. This was a much better way of getting across the room
than the stepping stone method. But the children with two
boards were completely unable to find this solution since
they were blocked by the adequacy of the other solution.
An
approach may choose itself because
it is obvious, or it may be the only one left after other
approaches have been blocked with a no label.
With vertical thinking,
an approach is selected in
either one of these two ways. With lateral thinking, as many
alternatives as possible are generated. One disregards the
no reaction since so often it is applied prematurely. One
may recognize the obvious approach but never the less go on
generating other ones as well.
Non‑Sequential
There may be no reason for saying something until after it
has been said. Once it has been said a context develops to
support it,
and yet it would never have been produced by a context. It
may not be possible to plan a new style in art, but once it
has
come
about it creates its own validity. It is usual to proceed
forward step by step until one has got somewhere. But it is
also possible to get there first by any means and then
look back and find the best route. A problem may be
worked forward from the beginning but it may also be worked
backwards from the end.
Instead of proceeding steadily along a pathway one jumps to
a different point,
or several different points in turn, and then waits for them
to link together to give a coherent pattern. It is in the
nature of the self‑maximizing system of the memory‑surface
to create a coherent pattern out of such separate points. If
the Pattern is effective then it cannot possibly matter
whether it came about in a sequential fashion or not. A
frame of reference is a context provided by the current
arrangement of information. It is the direction of
development implied by this arrangement. One cannot break
out of this frame of reference by working from within it. It
may be necessary to jump out, and if the jump is successful
then the frame of reference is itself altered.
Quota
It is
quite easy to set up a fixed quota of alternative
approaches that must be found for any problem. No one
approach is followed until the quota has been filled. This
procedure will not itself generate new approaches but it
will keep attention at the starting point instead of letting
it be led away by the first promising approach to the extent
that other approaches are never looked for.
Rotation of
Attention
If
one divides the situation into parts then it is possible to
have a deliberate technique which requires that each part
in rotation becomes the centre of attention. Once again
this is a delaying technique to prevent attention being
monopolized by the most dominant feature.
Reversal
This
involves taking something and turning it upside down.
Where one direction is defined then the opposite direction
is also defined by implication.
In a
winding country lane a motorist came up behind a slow moving
flock of sheep which filled the lane from side to side. The
lane was bounded by high walls with no gap and the motorist
was resigned to a long wait. Then the shepherd signaled the
motorist to stop, and proceeded to turn the flock round and
drive it back past the stationary motorist. It was a matter
of getting the sheep past the car rather than the car past
the sheep.
Cross‑fertilization
This
is a matter of providing a formal opportunity for
different minds to interact so that differences in
thinking about a subject act as outside influences to change
the established patterns in each mind. What is established
in one mind may be novel in another. Ideas spark off other
ideas.
Conclusions
These are a few of the formal techniques that can be used in
lateral thinking.
The techniques provide special opportunities for lateral
thinking processes to occur on the memory‑surface. Just
as a scientific experiment is a designed opportunity for
information to become manifest, so the formal techniques
are opportunities for information to become arranged in new
patterns. The patterns will be different, some of them may
be better.
Lateral thinking is a generative type of thinking.
Once a new arrangement of information has come about then it
can he examined by the usual selective processes. Lateral
thinking as a process can never justify the outcome, which
has to stand by itself. Lateral thinking in no way detracts
from the efficiency of vertical thinking. On the contrary,
as a generative process it can only add to the over‑all
effectiveness of any selective process.
It
sometimes happens that lateral thinking can provide an
insight rearrangement of information that by itself solves
the problem. At other times lateral thinking provides an
approach for vertical thinking to develop.
Late
twentieth‑century neuropsychological theory suggests that
the human forebrain can best be considered as a limbic
system and a frontal neocortex. The limbic system is the
seat of the emotions; it deals with the non‑rational. In
contrast, the neocortex is the thinking brain, but is itself
divided into lateral hemispheres with rather different
functions, see Table 2.1. In short, the left hemisphere is
Apollonian: verbal, mathematical, logical, deductive, and
oriented towards the external environment ('outward bound'),
whereas the right hemisphere is Dionysian: holistic,
intuitive, spatial, pattern‑recognizing, and concerned with
inner spaces ('Inward bound').
Table 2.1: Left-and right-brain functions
Left hemisphere |
Right hemisphere |
|
-
eidetic (image) language
-
pattern recognition
-
geometric, three-dimensional
-
reactive
-
creative
-
experiential (feel)
-
emotional (artistic)
-
synthetical (forest)
-
emphasizes relationships
-
color (blue ball)
-
associative (a shoe: let’s walk)
-
intuitive
(that’s possible)
-
space (enjoy where you're at)
|
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2.5 Brain and Thinking

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2.5
Brain and Thinking
A scientific field of study that helps us to distinguish the
functions of the brain from those performed by the mind is
hemisphere specialization. Launched in the early 1960s at
the California Institute of Technology by
psychologist Roger Sparry and his associates, the
field has advanced enormously with vigorous
neurophysiological and split brain studies that use computer
correlated psychophysiological measuring techniques. Today,
all major research works in visual communication media
related topics
for
example,
acknowledge the findings in the field of hemisphere
specialization, particularly those related to the
recognition and aesthetic effects of moving images. In
visual learning the discussion of left and right brain
recognition of moving images is very important because the
composition of visual images is directly related to brain
specialization.
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2.6 Left and Right
Brain Decodification of Visualsý
 |
2.6 Left and Right Brain
Decodification of Visualsý
The brain has two hemispheres connected with fibbers in the
corpus callosum.
If the corpus callosum did not exist, or if it was
surgically severed, visual and auditory information input
from the left eye and ear would reach only the left
hemisphere, and vice versa, as the optic and acoustic
chiasma that allows the criss‑crossing of the information
reaching the brain would no longer exist.
Extensive correlated studies that started with brain
surgeries mostly on epileptic patients and the latest
neuroanatomical and neurophysiologic ones that use
deoxyglucose to identify which part of the brain is more
active have confirmed that recognition of images is a
function of the right brain.
Underlining the tasks of the right brain, Ornstein
stated that: If the left hemisphere is specialized for
analysis, the right hemisphere seems specialized for
holistic mentation. Its language ability is quite
limited. This hemisphere is primarily responsible for our
orientation in space, artistic endeavour, crafts, body
image, and recognition of faces. It processes information
more diffusely than does the left hemisphere and its
responsibilities demand a ready integration of many inputs
at once. If the left hemisphere can be termed predominantly
analytic and sequential in its operation, then the right
hemisphere is more holistic and relational and more
simultaneous in its mode of operation.
Image recognition is a function of the right hemisphere of
the brain that controls the left side of the body.
Pictures are typically images of objects of the real world.
Consequently, picture recognition is a function of the right
hemisphere of the brain. Recognizing a television picture
that combines visuals, sounds, and motion is a holistic
process, a task performed by the right brain.
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2.7
The Rational Left and the Holistic Right Hemispheres of the
Human Brain
 |
2.7 The
Rational Left and the Holistic Right Hemispheres of the
Human Brain
The number of scientific studies on the left and right brain
specialization is immense, and the range of the fields of
study of brain specialization‑related investigation is
large. An impressive list of such findings illustrating
the two modes of operation of the brain was provided by
Nevitt.
The left brain is occidental,
whereas the right brain is oriental. The logical brain
recognizes objects and events sequentially and logically.
Watching the news delivered by a newscaster without
distracting visuals in the background is an occidental
function of the left brain that controls the right visual
field. However, watching a scene described by a newscaster
off camera is an oriental activity of the right brain that
controls the left visual field.
The left brain specializes in visual speech and recognizes
all activities involving language, logic, and words,
whereas the right hemisphere is predominantly musical and
acoustic and recognizes more readily melodies and musical
tunes. Because of this dichotomy of the brain's functions,
speeches on television tend to be monotonous and boring,
whereas musical concerts, even when filmed by one camera on
a long shot, are interesting to listen to and easier to
watch.
Charts, maps, numerical figures, tables, statistics, lists
of names, numbered items, and mathematical computations are
more readily recognized by the left hemisphere of the brain,
found to be specialized in logical, mathematical,
intellectual, sequential, and analytic functions.
Complex visual elements and multilevel action scenes placed
on the viewer's left side of the screen
are recognized by the holistic, simultaneous, intuitive or
creative, and synthetic right hemisphere of the brain.
Constructors of television programs
that consist primarily of scenes requiring a linear and
detailed controlled approach such as instructional or
educational programs, cooking shows, and language
instruction, should consider placement of such activities on
the right side of the screen to be recognized by the left
side of the viewers' brain. However, those producing
television programs consisting for the most part of scenes
with artistic, symbolic, simultaneous, emotional, and
intuitive content (such as experimental television programs,
music videos, art shows, and religious programs) should
consider placement of the main activities on the left side
of the screen for better recognition by the right
hemispheres of viewers' brains.
All quantitative activities encompassing the action of a
television program
such as the recognition of complex motor sequences and
significant order, reading, writing, numbering, and
analyzing should be placed on the right side of the screen
to be more readily recognized by viewers' left hemispheres.
On the other hand, all qualitative activities that
characterize the action in a television program such as
recognition of complex figures, abstract patterns, or scenes
requiring simultaneous comprehension, synthesis, and
configurations, have a better chance of being recognized if
placed on the viewers' left side of the screen.
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2.8 Perception and
Attention
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2.8 Perception and
Attention
Understanding the value of knowledge and the context in
which it is used is an important step in learning about
human cognition.
Nowhere are the roles of knowledge and context clearer than
in human perception.
The process
by which meaning is assigned to stimuli is referred to as
perception. Perception is critical to all aspects of
cognition and is itself directly influenced by the person’s
knowledge and the context of events created by his or her
knowledge. Closely related to perception is attention,
the allocation of a person's cognitive abilities. As your
read this page, you also may be listening to the radio. What
you perceive at any given moment depends on how your
attention is divided among various tasks. If most of it is
devoted to a weather forecast on the radio, you may not
correctly perceive the meaning of some of what you are
reading. On the other hand, if you are immersed in this
subject, you may not hear your name when the radio announcer
calls it and says that you have five minutes to phone to
collect a $1,000 prize.
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2.9 Perception |
2.9 Perception
Let's think for a moment about what is required for
perception the assignment of meaning to incoming stimuli to
occur, First, some aspect of the environment‑some
stimulus has to be picked up by the person (e.g., has to be
seen). Next, that stimulus has to be transformed and
held, somehow. A body of knowledge has to be available and
brought to bear on the stimulus (e.g., cat, cut, and cot are
the three‑letter words beginning with c and ending with t).
Finally, sonic decision has to be made‑a meaning must
be assigned (It's an "a").
The
very common phenomenon of identifying the letter "a"
seems far more complex when we consider what may happen
during the process of perception. One important observation
is the fact that perception takes time‑identifying the "M"
figure (or any other stimulus, for that matter) is not
instantaneous. Recall that the stimulus must be picked up
and transformed, memory must be called up, the stimulus must
be compared to what is in memory, and a decision must be
made. The fact that perception requires time leads to a
problem of sorts. Because environments may change rapidly
(as when watching a film or driving a car), a stimulus could
stop being available before a meaning was assigned. (Imagine
seeing
the
word:
DOOR projected by a slide projector for, say, one tenth of a
second.) Unless there is some way in which we can "hold"
that stimulus for a while, our perceptual processes would
have to stop in midstream.
The experience of watching a movie, for example, would be
terribly frustrating if stimulus after stimulus disappeared
before we could interpret their meaning. Our experience,
however, tells us that such breakdowns in our perceptual
processes occur infrequently. This is because our cognitive
systems are equipped to register sensory information.
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2.10 Sensory Registers |
ý2.10 Sensory Registers
One of the capabilities of our cognitive system is that it
can temporarily retain environmental information after it
has disappeared.
Apparently, each of our senses has this ability, a sensory
register, but research has focused almost entirely on vision
and hearing. Here we discuss the visual and auditory sensory
registers. |
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