There are composites of sensation which the baby experiences very

early. There is the feeling of clothes, for instance, made up of

warmth, of touch and pressure sensations all over his skin, and of

changes in the muscular feelings from constraint, and in the internal

feelings from the effect on circulation. There are feelings of fatigue

in one position, made up of sensations of touch, of the pressure of the

body’s weight on the under surfaces of skin, of some muscular tensions,

and perhaps of several other elements. Our baby’s nurse saved her much

fretting by simply changing the position of the little body from time

to time. We ourselves are constantly moving and shifting our positions,

to relieve a pressure on the skin here, or a muscular tension there,

but the wee baby cannot so much as turn his head or move a limb at will.

Vaguest and most composite of all is what is called “common sensation,”

or “general sensation”--that feeling of comfort or discomfort, vigor

or languor, diffused through the whole body, with which we are all

familiar. It seems to be very primitive in origin--indeed, the

speculation is that this dim, pervasive feeling is the original one,

the primitive way in which animal tissue responded to light and heat

and everything, before the special senses developed, gathering the

light sensations to one focus, the sound sensations to another, and so

on. But in its present development it is also largely made up of the

sum of all the organic sensations, and even of dim overflows of feeling

from the special senses.

It is with older people notably connected with emotional states. It

varies, of course, with health and external conditions; yet each person

seems from birth to be held to a certain fixed habit in this complex

underlying condition of feeling--pleasant with one, unpleasant with

another. This fixed habit of general sensation is perhaps the secret

of what we call temperament; while its surface variations seem to be

mainly responsible for moods.

Our baby showed temperament--luckily of the easy-going and cheerful

kind--from her first day (though we could hardly see this except by

looking back afterward); and there is no reason to doubt that she

experienced some general sensation from the first. It was evidently of

a pretty neutral sort, however: the definite appearance of high comfort

and well-being did not come till later; nor were moods apparent at

first.

Now in all this one significant thing appears. Sensations had from the

first the quality of being agreeable or disagreeable. The baby could

not wish, prefer, and choose, for she had not learned to remember and

compare; but she could like and dislike. And this was shown plainly

from the first hour by expressions of face--reflex facial movements,

so firmly associated in the human race with liking and disliking that

the most inexperienced observer recognizes their meaning at once. It

is said that facial expression comes by imitation, and that the blind

are therefore deficient in it; but this is not true of these simplest

expressions: they come by inheritance, and are present in the first

hour of life. A look of content or discontent, the monotonous cry, and

vague movements of limbs, head, and features,--these are the limits of

expression of feeling in the earliest days.

It would seem that in this sense condition there was nothing that could

give the baby any feeling of inner or outer, of space or locality. We

have some glimpse of the like condition ourselves,--when people say

after an explosion, for instance, that it “seemed to be inside their

own heads,” or when we try to locate a cicada’s note, or when we feel

diffused warmth.

Here is the conception I gathered of the dim life on which the little

creature entered at birth. She took in with a dull comfort the gentle

light that fell on her eyes, seeing without any sort of attention or

comprehension the moving blurs of darkness that varied it. She felt

motions and changes; she felt the action of her own muscles; and,

after the first three or four days, disagreeable shocks of sound now

and then broke through the silence, or perhaps through an unnoticed

jumble of faint noises. She felt touches on her body from time to time,

but without the least sense of the place of the touch (this became

evident enough later, as I shall relate in its order); and steady

slight sensations of touch from her clothes, from arms that held her,

from cushions on which she lay, poured in on her.

From time to time sensations of hunger, thirst, and once or twice of

pain, made themselves felt through all the others, and mounted till

they became distressing; from time to time a feeling of heightened

comfort flowed over her, as hunger and thirst were satisfied, or

release from clothes, and the effect of the bath and rubbing on her

circulation, increased the net sense of well-being. She felt slight

and unlocated discomforts from fatigue in one position, quickly

relieved by the watchful nurse. For the rest, she lay empty-minded,

neither consciously comfortable nor uncomfortable, yet on the whole

pervaded with a dull sense of well-being. Of the people about her, of

her mother’s face, of her own existence, of desire or fear, she knew

nothing.

Yet this dim dream was flecked all through with the beginnings of later

comparison and choice. The light was varied with dark; the feelings

of passive motion, of muscular action, of touch, of sound, were all

unlike each other; the discomforts of hunger, of pain, of fatigue,

were different discomforts. The baby began from the first moment to

accumulate varied experience, which before long would waken attention,

interest, discrimination, and vivid life.

IV

THE EARLIEST DEVELOPMENTS

Out of the new-born baby’s dim life of passivity the first path was

that of vision. I noticed about the end of the second week that her

eyes no longer wandered altogether helplessly, but rested with a long

and contented gaze on bright surfaces they chanced to encounter, such

as the shining of the lamp on the white ceiling, or our faces turned

toward the light as she lay on our knees. It was not active looking,

with any power to direct the eyes, but mere staring; when the gaze

fell by chance on the pleasant light, it clung there. But something

must have come to pass, that it _could_ stop and cling to what gave it

pleasure.

I think no one has yet analyzed this earliest stage in progress toward

real seeing, though Professor Sully touches on an explanation when

he says that the eyes “maintain their attitude under stimulus of the

pleasure.”

We know that muscular action is normally caused by stimulus received

from the nerve centres, and that in the earliest days there seems

to be a good deal of random discharge of stimulus, developed by the

growth of the centres, and causing aimless movements. Now there are

two fundamental and profoundly important things about this nervous

discharge. One is that pleasure, attention, or intensity of sensation

seems to have the power of increasing it, and thus influencing the

action of the muscles. The other is that the discharge always tends to

seek the same paths it has used before, and more and more easily each

time; so that physiologists speak of it as a current deepening its

channels. It is really nothing like a flowing liquid, nor the nerve

threads along which it passes like channeled watercourses. Still, just

as a current of water will deepen a gully till it drains into itself

all the water that had spread about in shallower ditches, so the wave

of molecular change running along a nerve somehow so prepares that

nerve that by and by, instead of spreading about through any fibres

that come handy, the whole energy will drain into the accustomed ones.

Then, of course, the muscles to which these run will perform more and

more easily the accustomed acts. Some of these channels--even whole

connected systems of them--are already well prepared by inheritance,

and hence come instinctive and reflex actions; many are still to be

deepened by the baby’s own experience.

Now suppose the aimless impulse straying to the baby’s eye muscles,

making the eyes roam hither and yon; but as they reach a certain

position, they fall upon a lighted surface, and a pleasant brightness

flows back into the consciousness; and something stirs within that has

power to send an intenser current through those same fibres. For the

time, at least, that channel is deepened, the wandering impulses are

drained into it, and the eye muscles are held steady in that position.

And, in fact, with the beginning of staring the irregular movements of

head and eyes did decline, and gradually disappear.

It is an important moment that marks the beginning of even a passive

power to control the movements; and when my grandmother handed down the

rule that you should never needlessly interrupt a baby’s staring, lest

you hinder the development of power of attention, she seems to have

been psychologically sound.

A fuller and pleasanter life now seemed to pervade the whole little

body. The grimaces of vague discomfort were disappearing, and the baby

began to wear a look of satisfaction as she lay, warm and fed and dry,

gazing at some light surface. In the bath, where the release from

clothes and the stimulus to circulation from the warm water heightened

the pleasant condition of general sensation, her expression approached

real delight; the movements of her limbs were freer, and all her

muscles tenser.

The neck muscles, especially, were so far “innervated”--that is,

supplied with nervous energy--as fairly to lift her head from the

supporting hand. This was probably not as yet a real effort to hold

up the head, only a drafting of surplus energy into the neck muscles,

partly because of inherited aptitude, partly because the pleasure

received from the lifted head and better seeing tended to draw the

energy thither, just as it was drawn to the eye muscles in the case

of the staring. At least one careful observer, Mrs. Edith Elmer Wood,

records this action of the neck muscles on the first day.

It was at this period that the baby first smiled; but being forewarned

of the “colic smile,” which counterfeits so exactly the earliest

true smiles,--fleeting as these are, just touching the mouth and

vanishing,--I never felt sure whether the baby was smiling for general

contentment with life, or whether a passing twinge had crossed her

comfort and drawn her lips into the semblance of a smile; and so never

dared to record the expression till it first occurred for unmistakable

pleasure.

There must have been rapid progress going on in the clearness of

muscular and touch sensations, and in the forming of associations in

the baby’s mind; but no plain evidence of these inner processes came

till the fourth week. Then I noticed that the baby, when crying with

hunger, would hush as soon as she was taken in the arms in the position

usual in nursing, as if she recognized the preliminaries, and knew she

was about to be satisfied. She could not, in fact, have remembered or

expected anything as yet; it was not memory, but a clear instance of

the working of that great law of association by which the raw material

of the senses was to be wrought up into an orderly mental life.

The substance of the law is that when experiences have repeatedly been

had together, the occurrence of one of them (still more, of several

out of a group, as in this case) tends to bring up into consciousness

the others. It is a law that underlies psychic life as profoundly as

the law that nerve energy seeks its old channels underlies physical

life. Indeed, it is in a sense the psychic side of the same law; for

it implies that when a group of nerve centres have formerly acted

together, the action of one tends to bring on that of the rest. So,

since the baby had often experienced the feeling of that particular

position (a combination of tactile and muscular and organic sensations)

in connection with the feeling of satisfied hunger, that comfortable

feeling, the missing member of the group, came into her consciousness

along with the rest, some moments in advance of the actual satisfaction.

I have said that this is not memory, yet there is in it a germ of

memory. A past experience is brought back to consciousness; and if it

were brought back as a definite idea, instead of a vague feeling, it

would be memory.

Close on this came another great advance in vision. This was on the

twenty-fifth day, toward evening, when the baby was lying on her

grandmother’s knee by the fire, in a condition of high well-being

and content, gazing at her grandmother’s face with an expression of

attention. I came and sat down close by, leaning over the baby, so that

my face must have come within the indirect range of her vision. At that

she turned her eyes to my face and gazed at it with the same appearance

of attention, and even of some effort, shown by a slight tension of

brows and lips, then turned her eyes back to her grandmother’s face,

and again to mine, and so several times. The last time she seemed to

catch sight of my shoulder, on which a high light struck from the lamp,

and not only moved her eyes, but threw her head far back to see it

better, and gazed for some time, with a new expression on her face--“a

sort of dim and rudimentary eagerness,” says my note. She no longer

stared, but really looked.

Clear seeing, let us here recall, is not done with the whole retina,

but only with a tiny spot in the centre, the so-called “yellow spot,”

or “macula lutea.” If the image of an object falls to one side of this,

especially if it is far to one side, we get only a shapeless impression

that something is there; we “catch a glimpse of it,” as we say. In

order really to look at it we turn our eyeballs toward the object till

the image falls on the spot of clear vision. We estimate the distance

through which to turn the balls, down to minute fractions of an inch,

by the feeling in the eye muscles.

This was what the baby had done, and I do not dare to say how many

philosophical and psychological discussions are involved in her

doing it. Professor Le Conte thinks that it shows an inborn sense of

direction, since the eyes are turned, not toward the side on which

the ray strikes the retina, but toward the side from which the ray

enters the eye; that is, the baby thinks out along the line of the ray

to the object it comes from, thus putting the object outside himself,

in space, as we do. Professor Wundt, the great German psychologist, is

positive that the baby has no sense of space or direction, but gains it

by just such measurements with the eye muscles; that there is no right

nor left, up nor down, for him, but only associations between the look

of things off at one side, and the feel of the eye action that brings

them to central vision.

This means that before a baby can carry the eye always through just

the right arc to look at an object, he must have made this association

between the look of things and the feel of the action separately for

each point of the retina. It is a great deal for a baby to have learned

in three weeks; still, babies have to learn fast if they are ever to

catch up with the race; and in the early roamings of the eye they

experience over and over all manner of transits of images to and fro

across the retina. Probably, too, it was still only partially learned.

I watched now for what Preyer’s record had led me to expect as the next

development in vision--the ability to follow a moving object with the

eyes; that is, to hold the yellow spot fixed on the object as it moved,

moving the eyeball in time with it in order to do so. I used my hand to

move to and fro before the baby, and could not satisfy myself that she

followed it, though she sometimes seemed to; but the day after she was

a month old I tried a candle, and her eyes followed it unmistakably;

she even threw her head back to follow it farther. In trying this

experiment, one should always use a bright object, should make sure

the baby’s eyes are fixed on it, and then should move it very slowly

indeed, right and left.

So far, there is no necessary proof of will. Longet found that the

eyes and head of a pigeon whose cerebrum had been removed would follow

a moving light. We ourselves can sit absorbed in thought or talk, yet

follow unconsciously with our eyes the movement of a lantern along a

dark road; and if something appears on the outer edge of our vision we

often turn quite involuntarily to look. But the baby’s new expression

of intelligence and interest showed that whether she willed the

movements or not, she attended to the new impressions she was getting.

Professor Preyer noticed the same dawn of intelligence in his baby’s

face at about the same stage. And it is worth while to observe that

when I came to study my record I was surprised to find how often such

an awakening look, an access of attention, wonder, or intelligence, in

the baby’s face, had coincided with some marked step in development and

signalized its great mental importance. I should advise any one who is

observing a baby to be on the lookout for this outward and visible

sign of an inward and spiritual unfolding.

In both these visual developments the baby had proved able to use

her neck in coöperation with her eyes, throwing back her head to see

farther. It began at the same time to seem that she was really and

deliberately trying to hold up her head for the same purpose of seeing

better. She not only straightened it up more and more in the bath, but

when she was laid against one’s breast she would lift her head from

the shoulder, sometimes for twenty seconds at a time, and look about.

Preyer sets this down as the first real act of will.

The baby’s increased interest in seeing centred especially on the

faces about her, at which she gazed with rapt interest. Even during

the period of mere staring, faces had oftenest held her eyes, probably

because they were oftener brought within the range of her clearest

seeing than other light surfaces. The large, light, moving patch of

the human face (as Preyer has pointed out) coming and going in the

field of vision, and oftener chancing to hover at the point of clearest

seeing than any other object, embellished with a play of high lights

on cheeks, teeth, and eyes, is calculated to excite the highest degree

of attention a baby is capable of at a month old. So from the very

first--before the baby has yet really seen his mother--her face and

that of his other nearest friends become the most active agents in his

development, and the most interesting things in his experience.

Our baby was at this time in a way aware of the difference between

companionship and solitude. In the latter days of the first month she

would lie contentedly in the room with people near by, but would fret

if left alone. But by the end of the month she was apt to fret when she

was laid down on a chair or lounge, and to become content only when

taken into the lap. This was not yet distinct memory and desire, but it

showed that associations of pleasure had been formed with the lap, and

that she felt a vague discomfort in the absence of these.

Just before she was a month old came an advance in hearing. So far

this sense had remained little more than a capacity for being startled

or made restless by harsh sounds. I had tested it on the twenty-third

day, and found that the baby scarcely noticed the sound of an ordinary

call bell unless it was struck within about six inches of her ear, and

suddenly and sharply at that; and on the twenty-sixth day she showed no

sign of hearing single notes of the piano, struck close to her, from

the highest to the lowest. But the next day, at the sound of chords,

strongly struck, she hushed when fretting with hunger, and listened

quietly for five minutes--her first pleasant experience through the

sense of hearing.

In the following days she would lie and take in the sound of the chords

with a look of content, staring at the same time into the face of

the person who held her, as if she associated the sound with that.

Only a few days later, when she was a month old, I thought that her

pleasure in companionship was increased if she was talked and crooned

to; and it is likely that by this time, though she had not hitherto

noticed voices, she was beginning to get them associated with the human

face--probably to the enhancement of its charm.

There were signs now, too, that touch sensations, in their principal

seat, the lips, were becoming a source of pleasure. The first smile

that I could conscientiously record occurred the day before the

baby was a month old, and it was provoked by the touch of a finger

on her lip; and a day or two later she smiled repeatedly at touches

on her lip. The day before she was a month old, also, when her lips

were brought up to the nipple, she laid hold upon it with them--the

first seizing of any sort, for her hands were still in their original

helplessness, waving vaguely about at the will of the nerve currents.

It is plain that the eyes led in the development of the psychic life.

Yet the baby was still far from real seeing. Professor Preyer believes

that there is at this stage no “accommodation” of the eyes to near

and far, although they can now be focused for right and left: that

is, both yellow spots can be brought to bear in unison on an object,

but the lenses do not yet adjust themselves to different distances.

Though the baby may have perceived direction, then, she could not have

perceived depth in space. It was only when an object chanced to be at

the distance for which her eyes were naturally adjusted that she could

have seen it clearly.

Nor is it likely that even then she saw anything as a definite outline,

but only as an undefined patch. The spot of clear vision in our eyes

is very small (a twenty-five cent piece would cover all the letters I

can take in at once on this page, if I do not let my eyes move in the

least), and the only way we ourselves see anything in definite outline

is by running our eyes swiftly over its surface and around its edges,

with long trained and unconscious skill. The baby had not yet learned

to do this. Her world of vision, much as it pleased her, was still only

patches of light and dark, with bits of glitter and motion. She could

turn her eyes and lift her head a little to make the vision clearer;

but except about her neck, eyes, and in a slight degree her lips,

she had no control of her body. She had gained much in grouping and

associating together her experiences, yet on the whole she still lived

among disjointed impressions.

In the light of such interpretations, the speculative attempts to

arrange a system of cradle education become futile. What can a swinging

ball do for a pupil whose sense apparatus is not yet in condition to

see the outline of the ball definitely? Froebel himself could not

have been expected to know much of the condition of a baby’s sense

apparatus; but modern Froebelians would be better apostles of his

almost Messianic inspiration if they were willing to throw frankly

aside his unfounded speculations and his obsolete science. The letter

killeth, but the spirit giveth life.

Meanwhile, nature has provided an educational appliance almost

ideally adapted to the child’s sense condition, in the mother’s

face, hovering close above him, smiling, laughing, nodding, with all

manner of delightful changes in the high lights; in the thousand

little meaningless caressing sounds, the singing, talking, calling,

that proceed from it; the patting, cuddling, lifting, and all the

ministrations that the baby feels while gazing at it, and associates

with it, till finally they group together and round out into the idea

of his mother as a whole.

Our baby’s mother rather resented the idea of being to her baby only a

collection of detached phenomena, instead of a mamma; but the more you

think of it the more flattering it is to be thus, as it were, dissolved

into your elements and incorporated item by item into the very

foundations of your baby’s mental life. Herein is hinted much of the

philosophy of personality; and Professor Baldwin has written a solid

book, mainly to show from the development of babies and little children

that all other people are part of each of us, and each of us is part of

all other people, and so there is really no separate personality, but

we are all one spirit, if we did but know it.

V

BEGINNINGS OF EMOTION AND PROGRESS IN SENSE POWERS

The biography of a baby · 第 2 / 9 段