The Science of Human Nature - William Henry Pyle (rocket ebook reader .TXT) 📗
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Figure II.—The Organization of Tendencies
From the point of view of physiology, the process of habit-formation consists in securing a particular nerve coupling, establishing a particular nerve path, so that a definite form of stimulation will bring about a definite form of response. A nerve tendency is simply the likelihood that a stimulus will take a certain course rather than any other. This likelihood is brought about by getting the stimulus to take the desired route through the nervous system to a group of muscles and to continue following this route. The more times it passes the same way, the greater is the probability that at any given time the stimulus will take the accustomed route and bring about the usual response. At first any sort of action is possible. A nerve stimulus can take any one of the many routes to the different muscles. By chance or by conscious direction, the stimulus takes a certain path, and by repetition we fix and make permanent this particular route. This constitutes a nerve tendency or habit.
Plasticity. Our discussion should have made it clear that habit is acquired nature, while instinct is inherited nature. Habit is acquired tendency while instinct is inherited tendency. The possibility of acquiring habits is peculiarly a human characteristic. While inanimate things have a definite nature, a definite way of reacting to forces which act upon them, they have little, if any, possibility of varying their way of acting. Water might be said to have habits. If one cools water, it turns to ice. If we heat it, it turns to steam. But it invariably does this. We cannot teach it any different way of acting. Under the same conditions it always does the same thing.
Plants are very much like inanimate things. Plants have definite ways of acting. A vine turns around a support. A leaf turns its upper surface to the light. But one cannot teach plants different ways of acting. The lower forms of animals are somewhat like plants and inanimate objects. But to a very slight extent they are variable and can form habits. Among the higher animals, such as dogs and other domestic animals, there is a greater possibility of forming habits. In man there are the greatest possibilities of habit-formation. In man the learned acts or habits are many as compared to the unlearned acts or instincts; while among the lower animals the opposite is the case—their instincts are many as compared to their habits.
We may call this possibility of forming habits plasticity. Inanimate objects such as iron, rocks, sulphur, oxygen, etc., have no plasticity. Plants have very little possibility of forming habits. Lower animals have somewhat more, and higher animals still more, while man has the greatest possibility of forming habits. This great possibility of forming habits is one of the main characteristics of man. Let us illustrate the contrast between man and inanimate objects by an example. If sulphur is put into a test tube and heated, it at first melts and becomes quite thin like water. If it is heated still more, it becomes thick and will not run out of the tube. It also becomes dark. Sulphur always does this when so treated. It cannot be taught to act differently. Now the action of sulphur when heated is like the action of a man when he turns to the right upon meeting a person in the street. But the man has to acquire this habit, while the sulphur does not have to learn its way of acting. Sulphur always acted in this way, while man did not perform his act at first, but had to learn it by slow repetition.
Everything in the world has its own peculiar nature, but man is unique in that his nature can be very much changed. To a large extent, a man is made, his nature is acquired. After we become men and women, we have hundreds and thousands of tendencies to action, definite forms of action, that we did not have when young. Man’s nature might be said to consist in his tendencies to action. Some of these tendencies he inherits; these are his instincts. Some of these he acquires; these are his habits.
What Habits Do for Us. We have found out what habits are like; let us now see what they do for us. What good do they accomplish for us? How are we different after forming a habit from what we were before? We can best answer these questions by a consideration of concrete cases. Typewriting will serve very well the purpose of illustration. We shall give the result of an actual experiment in which ten university students took part. During their first half hour of practice, they wrote an average of 120 words. At the end of forty-five hours of practice, they were writing an average of 680 words in a half hour. This was an increase of speed of 560 per cent. An expert typist can write about 3000 words in a half hour. Such a speed requires much more than forty-five hours practice, and is attained by the best operators only.
Figure III.—Learning Curves
The upper graph shows the improvement in speed of a group of students working two half hours a day. The lower curve shows the improvement of a group working ten half-hours a day.
In the foregoing experiment, the students improved in accuracy also. At the beginning of the work, they made 115 errors in the half hour. At the end of the practice, with much faster speed, they were making only 327 errors in a half hour. The actual number of errors had increased 280 per cent. The increase in errors was therefore exactly half as much as the increase in speed. This, of course, was a considerable increase in accuracy, for while the speed had increased to 5.6 times what it had been at the beginning, the errors had increased only 2.8 times. The subjects in this experiment paid much more attention to speed than they did to accuracy. If they had emphasized accuracy, they would have been doing almost perfect work at the end of the practice, and their speed would have been somewhat less. Practice, then, not only develops speed but also develops accuracy.
There are also other results. At the beginning of work with the typewriter, there is much waste of energy and much fatigue. The waste of energy comes from using unnecessary muscles, and the fatigue is partly due to this waste of energy. But even apart from this waste of energy, an habituated act is performed with less fatigue. The various muscles concerned become better able to do their work. As a result of habituation there is, then, greater speed, greater accuracy, less waste of energy, and less fatigue.
If we look not at the changes in our work but at the changes in ourselves, the changes in our minds due to the formation of habits, we find still other results. At the beginning of practice with the typewriter, the learner’s whole attention is occupied with the work. When one is learning to do a new trick, the attention cannot be divided. The whole mind must be devoted to the work. But after one has practiced for several weeks, one can operate the typewriter while thinking about something else. We say that the habituated act sinks to a lower level of consciousness, meaning that as a habit becomes more and more fixed, less and less attention is devoted to the acts concerned.
Increased skill gives us pleasure and also gives us confidence in our ability to do the thing. Corresponding to this inner confidence is outer certainty. There is greater objective certainty in our performance and a corresponding inner confidence. By objective certainty, we mean that a person watching our performance, becomes more and more sure of our ability to perform, and we ourselves feel confidence in our power of achievement.
Now that we have shown the results of habituation let us consider additional illustrations. In piano playing, the stimuli are the notes as written in the music. We see the notes occupying certain places on the scale of the music. A note in a certain place means that we must strike a certain key. At first the response is slow, we have to hunt out each note on the keyboard. Moreover, we make many mistakes; we strike the wrong keys just as we do in typewriting. We are awkward, making many unnecessary movements, and the work is tiresome and fatiguing. After long practice, the speed with which we can manipulate the keys in playing the piano is wonderful. Our playing becomes accurate, perfect. We do it with ease, with no unnecessary movements. We can play the piano, after we become skilled, without paying attention to the actual movements of our hands. We can play the piano while concentrating upon the meaning of the music, or while carrying on a conversation, or while thinking about something else. As a rule, pleasure and confidence come with skill. Playing a difficult piece on the piano involves a skill which is one of the most complicated that man achieves. It is possible only through habituation of the piano-playing movements.
Nailing shingles on a roof illustrates well the various aspects of habituation. The expert carpenter not only nails on many more shingles in a day than does the amateur, but he does it better and with more ease, and with much less fatigue. The carpenter knows exactly how much he can do in a day, and each particular movement is certain and sure. The carpenter has confidence in, and usually prides himself on, this ability, thus getting pleasure out of his work.
The operations in arithmetic illustrate most of the results of habituation. Practice in addition makes for speed and accuracy. In a few weeks’ time we can very much increase our speed and accuracy in adding, or in the other arithmetical operations.
The foregoing examples are sufficient, although they could be multiplied indefinitely. Almost any habit one might name would show clearly most of the results enumerated. The most important aspects of habituation may be summed up in the one word efficiency. Habituation gives us speed and accuracy. Speed and accuracy mean skill. Skill means efficiency.
How Habits Are Formed. It is clear from the foregoing discussion that the essential thing in a habit is the definiteness of the connection between the stimulus and the response, between the situation and the reaction to the situation. Our question now is, how is this definiteness of connection established? The answer is, through repetition. Let us work the matter out from a concrete case, such as learning to play the piano. In piano playing the stimulus comes from the music as printed on the staff. A note having a certain position on the staff indicates that a certain key is to be struck. We are told by our music teacher what keys on the piano correspond to the various notes on the staff, or we may learn these facts from the instruction book. It makes no difference how we learn them; but after we know these facts, we must have practice to give us skill. The mere knowledge will not make us piano players. In order to be
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