Dr. Watson and I have been invited to debate upon the fundamentals of psychology, because we are regarded as holding extremely different views; yet there is much in common between us. I wish to emphasize this common ground no less than our differences.
I would begin by confessing that in this discussion I have an initial advantage over Dr. Watson, an advantage which I feel to be so great as to be unfair; namely, all persons of common-sense will of necessity be on my side from the outset, or at least as soon as they understand the issue. [p. 41]
On the other hand, Dr. Watson also can claim certain initial advantages; all these together constitute a considerable asset that partially redresses the balance. First, there is a considerable number of persons so constituted that they are attracted by whatever is bizarre, paradoxical, preposterous, and outrageous, whatever is 'agin the government,' whatever is unorthodox and opposed to accepted principles. All these will inevitably be on Dr. Watson's side.
Secondly, Dr. Watson's views are attractive to many persons, and especially to many young persons, by reason of the fact that these views simplify so greatly the problems that lie before the student of psychology: they abolish at one stroke many tough problems with which the greatest intellects have struggled with only very partial success for more than two thousand years; and they do this by the bold and simple expedient of inviting the student to shut his eyes to them, to turn resolutely away from them, and to forget that they exist. This naturally inspires in the breast of many young people, especially [p. 42] perhaps those who still have examinations to pass, a feeling of profound gratitude to Dr. Watson. He appears to them as the great liberator, the man who sets free the slave of the lamp, who emancipates vast numbers of his unfortunate fellow creatures from the task of struggling with problems which they do not comprehend and which they cannot hope to solve. In short, Dr. Watson's views are attractive to those who are born tired, no less than to those who are born Bolshevists 2]
Thirdly, Dr. Watson's views not only have the air of attractive simplicity, but also they claim to bring, and they have the air of bringing psychology into line with the other natural sciences and of rendering it strictly scientific.
Fourthly, Dr. Watson's cause has, on this occasion, the incalculable advantage of [p. 43] being presented by his attractive and forceful personality.
Fifthly, Watsonian Behaviorism is a peculiarly American product. It may even be claimed that it bears very clearly the marks of the national genius for seeking short cuts to great results. And if no European psychologist can be brought to regard it seriously, that may be accepted as merely another evidence of the effeteness of European civilization and the obtuseness of the European intellect, beclouded by the mists of two thousand years of culture and tradition. Here, in this great and beautiful city, the capital of the proudest and most powerful nation in all the earth, this patriotic consideration can hardly fail to carry weight.
Lastly, Dr. Watson has the advantage of being in a position that must excite pity for him in the minds of those who understand the situation. And I will frankly confess that I share this feeling. I am sorry for Dr. Watson; and I am sorry about him. For I regard Dr. Watson as a good man gone wrong. I regard him as a bold pioneer whose enthusiasm, in the [p. 44] cause of reform in psychology, has carried him too far in the path of reform; one whose impetus, increased by the plaudits of a throng of youthful admirers, has caused him to overshoot the mark and to land in a ditch, a false position from which he has not yet summoned up the moral courage to retreat. And so long as his followers continue to jump into the ditch after him, shouting loud songs of triumph as they go, he does need great moral courage in order to climb back and brush off the mud; for such retreat might even seem to be a betrayal of those faithful followers.
Now, though I am sorry for Dr. Watson, I mean to be entirely frank about his position. If he were an ordinary human being, I should feel obliged to exercise a certain reserve, for fear of hurting his feelings. We all know that Dr. Watson has his feelings, like the rest of us. But I am at liberty to trample on his feelings in the most ruthless manner; for Dr. Watson has assured us (and it is the very essence of his peculiar doctrine) that he does not care a cent about feelings, whether his own or those of any other person. [p. 45]
After these preliminary observations, I will point out that Dr. Watson has shown serious misunderstanding of my position, and does me grave injustice in certain respects. Namely, he suspects me of being a sort of priest in disguise, a wolf in sheep's clothing, a believer in conventional morality, an upholder of exploded dogmas. He has announced in large headlines that 'MacDougall Returns to Religion.' I cannot stop to refute these dreadful charges. I must be content to assert flatly that I am a hard-boiled scientist, as hard-oiled as Dr. Watson himself and perhaps more so 4] In all this psychology business, my aim is purely and solely to approximate towards the truth, that is to say, to achieve [p. 46] such understanding of human nature as will promote for each of us our power of controlling it, both in ourselves and in others.
In spite of the clarity of Dr. Watson's exposition, I do not believe that he has made quite clear the nature of the issues between us. There are really two main questions in dispute, two fundamentals on which we disagree. These may be shortly defined as, first, Dr. Watson's Behaviorism, secondly, his acceptance of the mechanistic dogma. The second is the more important. I will say a few words about each of these topics in the order named.
There are, as I understand it, three chief forms of 'Behaviorism,' as the word is commonly used. First, there is 'Metaphysical Behaviorism,' which also goes by the name of 'Neo-Realism.' This is an inversion of subjective idealism. While the idealist says: 'What you call the things or objects of the physical world are really your thoughts or phases of your thinking,' the neo-realist says: 'What you call your thoughts, or phases of your thinking and feeling, are really things or processes of the physical world.' I need not trouble [p. 47] you by dwelling further upon this strange doctrine: for it is not the form of Behaviorism expounded by Dr, Watson 5] I will only say of it that it is the latest and presumably the last (because the only remaining) possible formulation of that most elusive of all relations, the relation of the mental to the physical. As a novelty (which we owe to a suggestion from the extraordinarily fertile mind of William James) it deserves and is enjoying a certain vogue.
Secondly, there is the true or original Watsonian Behaviorism. There is no 'metaphysical nonsense' about this. In fact, it is its principal distinction, the principal virtue claimed for it, that it extradites from the province of psychology every question that may be suspected of being metaphysical, and so purges the fold of the true believers, leaving them in intellectual [p. 48] peace forevermore. The essence of this form of Behaviorism is that it refuses to have any dealings with introspectively observable facts, resolutely refuses to attempt to state them, describe them, interpret them, make use of them, or take account of them in any way. All such facts as feelings, feelings of pleasure and pain or distress; emotional experiences, those we denote by such terms as anger, fear, disgust, pity, disappointment, sorrow, and so forth; all experiences of desiring, longing, striving, making an effort, choosing; all experiences of recollecting, imagining, dreaming, of fantasy, of anticipation, of planning or foreseeing; all these and all other experiences are to be resolutely ignored by this weird new psychology. The psychologist is to rely upon data of one kind only, the data or facts of observation obtainable by observing the movements and other bodily changes exhibited by human and other organisms.
Thirdly, there is sane Behaviorism, or that kind of psychology which, while making use of all introspectively observable facts or data, does not neglect the observation [p. 49] of behavior, does not fail to make full use of all the facts which are the exclusive data of Watsonian Behaviorism. This same Behaviorism is the kind of psychology that is referred to approvingly, by many contemporary writers in other fields, as 'Behavioristic Psychology.'
And now, trampling ruthlessly on Dr. Watson's feelings, I make the impudent claim to be the chief begetter and exponent of this sane Behaviorism or Behavioristic Psychology, as distinct from the other two forms of Behaviorism. I claim in fact that, as regards the Behaviorism which is approvingly referred to by many contemporary writers other than technical psychologists, I, rather than Dr. Watson, am the Arch-Behaviorist. Up to the end of the last century and beyond it, psychologists did in the main concentrate their attention upon the introspectively observable facts, unduly neglecting the facts of human action or behavior, and ignoring the need for some adequate theory of behavior and [p. 50] of character (of which behavior or conduct is the outward expression). This neglect is implied in the definition of psychology commonly accepted at that time, namely, the 'science of consciousness,' and it may be well illustrated by reference to two leading psychologists, one of the middle, the other of the end, of the nineteenth century. John Stuart Mill, after expending much labor in the endeavor to patch up the hopelessly inadequate psychology of his father, James Mill, and of the other British Associationists, seems to have realized that the psychology he had achieved by this patching process had little or no bearing upon the facts of conduct and of character; for he set to work to construct a completely new science, a science different from and independent of psychology, a science of behavior, of conduct, and of character, for which he proposed the name of 'Ethology.'
At the end of the century, or a little later, my lamented friend, Dr. Charles Mercier, repeated this significant attempt. [p. 51] He was an ardent disciple of Herbert Spencer, and had written several well-known and forcible expositions of Spencerian psychology. Then, seemingly in blissful ignorance of J. S. Mill's proposal, he also, realizing that his psychology threw little or no light upon human action, conduct or behavior, proposed to construct a new science of behavior. This time the name given to this new science was 'Praxiology.'
It was at this time that I was beginning to struggle with the fundamentals of psychology. And it seemed to me that both Mill and Mercier were in error; that what was needed was not a new science of behavior under a new Greek name, but rather a reform of psychology, consisting in a greater attention to the facts of behavior or conduct, in the formulation of some theory of human action less inadequate than the hedonism of Mill and Bain, the ideo-motor theory of the intellectualists, or the mechanical reflex-theory of the Spencerian psychologists. I gave expression to this view in my first book, by proposing to define [p. 52] psychology as the positive science of conduct. I further defended this definition and expounded the need of this reform in my 'Introduction to Social Psychology' (1908). And in 1912 I published my little book entitled 'Psychology, the Study of Behavior.' I also proposed that distinction between psychology and physiology which Dr. Watson accepts, namely, that physiology studies the processes of organs and tissues, while psychology studies the total activities of the organism. Further, in the year 1901, I had begun to practice strictly behavioristic experiment upon infants, making a strictly objective or behavioristic study of the development of color discrimination in my children; by this means I was able to demonstrate for the first time the capacity for color-discrimination as early as the second half-year after birth. That is to say, I practiced with good results, as early as the year Igor, the principles which Dr. Watson began to expound and apply some ten years later. [p. 53]
Dr. Watson and I are, then, engaged in the same enterprise, the endeavor to reform psychology by correcting the traditional tendency to concentrate upon the facts of consciousness to the neglect of the facts of behavior. The difference between us in this respect is that I, unlike Dr. Watson, have not made myself at the same time famous and ridiculous by allowing the impetus of my reforming zeal to carry me over from one lop-sided extreme position to its opposite, from exclusive concern with the facts of consciousness to exclusive concern with the facts of behavior. Dr. Watson has been content, like J. S. Mill and Charles Mercier before him, to regard psychology as the science of consciousness and to set to work, like them, to construct a new and independent science of behavior. He differs from them only in denying that the older study (that of consciousness) has any scientific value or interest. I, on the other hand, maintain that the two sets of data, the facts ascertainable by introspective observation, and the objectively observable facts of behavior, are not data for two distinct sciences, but [p. 54] rather are two classes of data both useful and both indispensable for the one science of human nature properly called 'psychology.' Dr. Watson refuses to attempt to make use of the data of the former class, because from them alone, as he rightly insists, a science of human nature can never be constructed, and because the efforts of two thousand years along this line have proved relatively sterile: I, on the other hand, insist that the problems of human nature are so obscure and difficult that we cannot afford to neglect, or to throw deliberately aside, any available data, and certainly not the data afforded by one's own introspection and by the reports of similar introspective observations made by our fellow men; but that rather we need to make use of every available source of information and mode of observation. And here I would point out that there is a third great class of data which Dr. Watson's principles compel him to neglect, to repudiate; namely, the facts which we may observe as to the various conditions (external or bodily and mental or subjective) under which the various [p. 55] modes and phases of our conscious experience arise. Dr. Watson, then, deliberately restricts himself to the use of one of three great classes of data, refusing to attempt to make use of the other two great classes; while I claim that all three are useful and valid, and that to debar oneself from the use of two of these classes is to pass a self-denying ordinance of a peculiarly gratuitous foolishness.
Let me briefly illustrate this difference between us by a few samples of concrete psychological problems, problems of human nature. I place my hand upon the table, and Dr. Watson sticks a pin into the tip of one finger. My hand is promptly withdrawn; that is the behavioristic fact. I say that I felt a sharp pain when the pin was stuck in; Dr. Watson is not interested in my report of that fact. His principles will not allow him to take account of the fact, nor to inquire whether my statement is true or false. He repeats his experiment on a thousand hands, hands of babies, men and monkeys; and, finding that in every case the hand is promptly withdrawn, he makes the empirical [p. 56] generalization that sticking a pin into an extended hand causes it to be promptly withdrawn -- and that is as far as his methods and principles will allow him to go in the study of this interesting phenomenon. He maintains with some plausibility that my introspectively observed fact of painful feeling is quite irrelevant and useless to him as a student of the human organism. But now I ask Dr. Watson to repeat the experiment on myself. He sticks in the pin once more; and this time the hand is not withdrawn, but remains at rest; and I continue to smile calmly upon him. What will Dr. Watson do with this new fact, a fact so upsetting to his empirical generalization which appeared to be on the point of becoming a 'law of nature'? He can do nothing with it. But if for a moment he will consent to use ordinary good sense and will listen to my 'introspective' report, and if I report truly, he may be much enlightened; though, if I wish to mislead him and report falsely he may be deceived. There in a nutshell you have the difference [p. 57] between sane Behaviorism and Watsonian Behaviorism 10]
It is true that Dr. Watson declares his willingness to make use of the 'verbal reports' of the subjects of his experiments; but, when such a report consists of statements of introspectively observed facts, Dr. Watson is not entitled (consistently with his principles) to take account of the meaning of the words his subject utters; his principles permit him only to observe and record the movements of his subject's speech-organs and the physical vibrations of the air set up by them. He cannot, consistently with his principles, raise the question whether his subject is reporting accurately or truthfully.
Let me enforce this last important point with another instance. You call on a friend and ask her to accompany you to a theater. She refuses, alleging a headache; and you go away crestfallen, in an agony of doubt, asking yourself: Was she telling [p. 58] the truth about that headache, or was it merely an excuse for getting rid of me? Would the most scientific Behaviorist be proof against the weakness of raising in his own mind this bat8ing question? Be it further noted that the Behaviorist, even if he (being so inconsistent as to wish to inquire into the truth or falsehood of the statement) were given the fullest opportunity to apply a battery of his most delicate instruments to the person claiming the headache, would obtain no satisfying answer; his instruments could wring no answer from the Sphinx, and he would continue to be tortured by that baffling question. In passing I will point out that here we are close to the problems of malingering; and that, among the symptoms claimed by malingerers, the commonest are subjective symptoms, accessible only to introspective observation, headaches, pains, feelings of fear, of fatigue, of dizziness, of unreality, or moral unworthiness, hallucinatory voices and images, delusions and amnesias. Assertions of such subjective symptoms constitute very real and practically important problems for [p. 59] medical men, and especially for medical officers in the Army. During the late war I had to face such problems in thousands of instances. And sometimes on the question of truth or falsehood of the introspective report there hangs the possibility of the severest penalty, even the death penalty. Yet by the Watsonian Behaviorist such questions of truth and falsehood must be sternly put aside as of no interest to him.
Again, there is a large class of problems of great interest, problems of the borderland between physiology and psychology, which the consistent Behaviorist must forever pass by as a terra incognita: a very large proportion of the fascinating problems of sense-physiology belong here, such problems as the issue between the color theories of Hering and of Helmholtz and the problems raised by thousands of facts, such as after-images, color-contrast, harmony of colors and of tones, the effects of brain-lesions on sensory experiences, and so forth. I will mention specifically only one very simple example of such problems. If you give me a dose of a certain drug [p. 60] (santonin) I soon afterwards begin to observe that all the white and gray surfaces of this hall appear to be no longer white or gray, but tinged with violet color. The drug has produced a chemical change in the substance of my cerebro-retinal tract which in turn produces this curious subjective effect. Now the man who shall explain this effect will have added greatly to our knowledge of the human organism. Yet, if we all were consistent Behaviorists, we should never come within sight of this problem, much less solve it; or at least, though purely objective observation might discover that santonin has some peculiar effect upon the retino-cerebral tract, it is highly improbable that the fact would be discovered until after some further centuries of progress in the science of physiology.
Another type of problem insoluble for the Behaviorist. I meet a stranger and feel a strong aversion from him, for which feeling I cannot account. The Behaviorist may notice my cold aversive behavior; and he will say that my report of my feeling does not interest him. Well and good, so [p. 61] far. But later in the day I remember a horrible dream of the foregoing night in which has appeared a sinister figure; and now I recognize a subtle likeness between the stranger and this figure; and recognize also the similarity between my emotional experiences before this figure and before the stranger. Do not the introspectively reported facts throw some light on my reaction to the stranger? Do they not in a sense explain it? Are they of no interest to the student of human nature? Yet Dr. Watson's principles forbid him to take account of the meaning of the words in which I report the dream.
In this connection I would point out that some bold physicians, caring nothing for logical consistency and everything for the appearance of being up-to-date and 'in the swim,' proclaim allegiance both to Dr. Watson and to the principles of psychoanalysis. But psychoanalysis relies very largely upon the analysis of dreams reported by the patient; and dreams are forever a closed book to the true Behaviorist. He may listen to your long-winded descriptions of your amusing or terrifying [p. 62] or absurd dream-experiences; but for him your words are merely so many physical vibrations; the meaning of your words reporting these experiences he cannot consistently take into account. It is all one to him whether your description is approximately truthful, or a mere fable concocted on the spur of the moment for his edification 11]
Day-dreams also are forbidden ground to the Behaviorist; yet we have recently begun to realize that the sympathetic uncovering of the fantasies and day-dreams of children may be in many cases of the utmost importance to the educator or parent who would wisely guide the development of the child. One more instance. I come into this hall and see a man on this platform scraping the guts of a cat with hairs from the tail of a horse; and, sitting silently in attitudes of rapt attention, are a thousand persons, who presently break out into wild applause. [p. 63] How will the Behaviorist explain these strange incidents? How explain the fact that the vibrations emitted by the catgut stimulate all the thousand into absolute silence and quiescence; and the further fact that the cessation of the stimulus seems to be a stimulus to the most frantic activity? Common-sense and psychology agree in accepting the explanation that the audience heard the music with keen pleasure, and vented their gratitude and admiration for the artist in shouts and hand-clappings. But the Behaviorist knows nothing of pleasure and pain, of admiration and gratitude. He has relegated all such 'metaphysical entities' to the dust heap, and must seek some other explanation. Let us leave him seeking it. The search will keep him harmlessly occupied for some centuries to come 12]
Some of you may suspect that I am seeking [p. 64] to discredit Dr. Watson by exaggerating grossly the preposterousness of his doctrine. I will therefore conclude this section of my remarks by referring to the most famous and most explicitly formulated article of his creed, one which puts all the others into the shade. It runs: All that is called thinking is merely the mechanical play of the speech-organs. In his excess of zeal Dr. Watson (in a manner strongly reminiscent of the late lamented Dr. Jacques Loeb) overshoots his own mark and tries to show that this view is plausible, even if by 'speech-organs' we denote only the peripheral organs, the muscles, etc., of lips, tongue, and larynx. But I do not wish to take advantage of this incautious slip on his part; and I will give Dr. Watson's view the benefit of the assumption that the internal or cerebral organs of speech may operate without innervating the peripheral organs. Even under this less extravagant form, this view of the thinking-process is rendered untenable by a multitude of familiar facts; for example, if I keep my speech-organs cleared for action, I can think no better [p. 65] than if I am sucking a pipe (some of us even find that sucking a pipe is an aid to thinking), chewing a mouthful of food, or whistling or humming a familiar tune. I ask you to examine the question in the light of your own experience. Do such activities of the organs of speech interfere appreciably with such thinking as planning a move on the chess-board? Again, there are many cases on record of patients rendered aphasic, that is speechless, by injury, not of the peripheral speech-organs, but of the cerebral speech-organs; yet many such patients think very well; they know very well what they want to say, but cannot say it. Some patients can play such a game as chess, even though their cerebral speech-organs are so far destroyed that, as well as finding it impossible to utter coherent speech, they cannot understand written or spoken language.
Again, some musicians of very limited powers of vocalization can read the score of a complex orchestral composition. And some of them tell us that they prefer to sit at home and read the score of a great symphony rather than go to the concert-hall [p. 66] to hear it performed; because when they read it in silence, they can appreciate it and enjoy it to the full, whereas, when they listen to the orchestra, they are annoyed by the errors and short-comings of the performers. The only answer Dr. Watson can make to these facts (his only response to these 'stimuli') is to ignore them entirely, or to assert that, when he says 'thinking,' he means verbal thinking. If he takes the second line, I reply that of course verbal thinking is by definition thinking by the aid of words, and of course cerebral speech-organs are involved in it. No one doubts that. My point is that much thinking, for instance, chess-playing, planning a house or garden, inventing a machine, reading or composing music, dreaming, building castles in the air -- all these and many other important kinds of thinking do not necessarily involve any play of the speech-organs, whether peripheral or cerebral, and often go on without such accompaniment.
I turn to consider very briefly the more important question at issue between us, namely, the truth or plausibility of the [p. 67] mechanistic dogma. This, I say, is more important because, unlike Watsonian Behaviorism, it is not merely a passing fashion of a group of pundits, cloistered in psychological laboratories. It is a metaphysical assumption which has been of great influence ever since the day when Democritus first clearly formulated it. It has reappeared as the determining factor in such different philosophies as the materialism of Hobbes and La Mettrie, the pantheism of Spinoza, and the idealism of Bernard Bosanquet. And it is accepted to-day by a larger number of biologists as an unquestionable first principle and a necessary foundation of all science. As applied to human nature, to human conduct, it may be and commonly is stated in two ways, a narrower and a wider way. The narrower formulation runs: Man is a machine and his every action is the outcome of mechanical processes that in theory can be exactly calculated and foretold according to strictly mechanistic principles. The wider formulation runs: Every human activity and process, like every other process in the world, is strictly determined by antecedent [p. 68] processes, and therefore, in principle, can be predicted with complete accuracy.
The only test which we can usefully apply to this mechanical assumption is the pragmatic test. Does it work? Is it a good working hypothesis, that is, one which fruitfully guides our observation and our thinking? Well, in the sphere of the inorganic sciences, it has worked very well until recently; it has proved itself a good working hypothesis. But recently some physicists (I have in mind especially Prof. Bohr and his theory of the structure of the atom) have found that they can make better progress if they reject this mechanical hypothesis and make non-mechanical assumptions; and I understand that this new fashion is rapidly gaining ground among the physicists.
In the sphere of human nature and conduct, this mechanistic assumption has never shown itself to have any value or usefulness as a working hypothesis. Rather, it has in very many cases blinded those who have held it dogmatically to a multitude of facts, and has led to various extravagant [p. 69] and absurd views of human nature, which views Watsonian Behaviorism one.
I submit to you the proposition that any psychology which accepts this mechanistic dogma and shapes itself accordingly is useless, save for certain very limited purposes, because it is incapable of recognizing and of taking account of the most fundamental facts of human behavior. I may best illustrate this fact very briefly by pointing out that, for any such psychology, certain words that are indispensable for the normal conduct of life lose their meaning entirely and have to be dropped: for example, all such words as 'incentive,' 'motive,' 'purpose,' 'intention,' 'goal,' 'desire,' 'valuing,' 'striving,' 'willing,' 'hoping,' and 'responsibility.' Now I put it to the practical men among you, to the educators, the business-men, the personnel-managers, and especially to the men [p. 70] of law, the eminent jurists here present: have you any use for a psychology from which these words and all words of similar meaning are extruded, because deprived of all meaning? Of course you have no use for it. To adopt such a psychology is to paralyze yourself in all practical affairs, if you consistently apply it. Consider the case of a judge or juryman set to try a case of murder and prohibited by his principles from inquiring into the intentions, the motives, and the responsibility of the accused. It cannot be done: such a judge would be useless, such psychology will not work in practical affairs 14] Putting the case more broadly, I say we are all bound to believe, and (so long as we are efficient members of society) we show by our acts that we do believe, that human efforts, human desires, human ideals, human strivings do make a difference to the course of events. If we do not believe this it is futile and inconsistent to talk of and to strive after self-discipline, or the [p. 71] moral training of our children, or social betterment or the realization by our efforts of any ideal whatsoever.
At the present time in all parts of the world all men and women of good will and public spirit are seeking and striving to find some way to prevent the outbreak of a new world war. But if the mechanical psychology is true, if all human action as well as all other events are strictly predetermined, it is perfectly futile for us to think, to plan, and to strive to prevent war; for the war is either coming or not coming, regardless of what men may strive to do to prevent it or to incite it. All of us may just as well relax our efforts; eat, drink, and be merry; for our thinking out plans, our Leagues of Nations, our World Courts, our disarmament treaties, our most strenuous efforts to realize the ideal of peace by aid of such plans -- all alike are perfectly futile. .If all men believed the teachings of the mechanical psychology (and only beliefs that govern action are real beliefs) no man would raise a finger in the effort to prevent war, to achieve peace or to realize any other ideal. So I [p. 72] say that the mechanical psychology is useless and far worse than useless: it is paralyzing to human effort.
And it flies in the face of fundamental and obvious facts. The most fundamental fact about human life is that from moment to moment each one of us is constantly engaged in striving to bring about, to realize, to make actual, that which he conceives as possible and desires to achieve, whether it is only the securing of his next meal, the control of his temper, or the realization of a great ideal. Man is fundamentally a purposive striving creature. He looks before and after and longs for what is not. And he does not merely long; he strives to achieve that which he longs for, to bring about what is not yet actual, what he judges and desires should be; sometimes he succeeds, sometimes he fails, and sometimes he makes some progress towards his ideal goal. Any psychology which refuses to recognize the reality of this longing and striving and which denies all efficacy to such striving is useless and worse. Like Behaviorism, it is a mere [p. 73] fad of the academic mind that bars the progress of our knowledge of human nature. As the late Professor Münsterberg so strongly and repeatedly insisted, this elaborate academic fiction which is the mechanical psychology has no bearing on the practical problems of human life.
As this is a personal debate, I will illustrate the fact in this way. Since the publication of my Introduction to Social Psychology in the year 1908, some scores of books, I think I might safely say some hundreds, have been published, dealing with problems of applied psychology, and founded avowedly or actually on the teachings of that book of mine. On the other hand, I ask what social application in education, in medicine, in industry, in politics, can the mechanical psychology claim? The answer is: None. And one of the surest predictions we can make about human affairs is that it never will.
To this prediction I add another, namely, that in proportion as psychology resigns its pretensions to be an exact science based on mechanical principles and [p. 7 4] frankly accepts purposive striving as a fundamental category -- as fundamental as the law of conservation of momentum in mechanics -- in just such proportion will it gain recognition as the indispensable basis of all the social sciences. This prediction is not without foundation in past experience. We have had already in the field of mental medicine an impressive demonstration of the truth I am insisting on. The mechanical psychology, the intellectualistic psychology, and the hedonistic psychology, these three psychologies, which were the prevailing fashions of the nineteenth century, were of little or no use to the students of mental disease. In consequence mental medicine, or psychiatry, was at a standstill. The genius of Freud, disregarding all these traditional psychologies, introduced a psychology of which the keynote is purposive striving, a hormic psychology which operates not with mechanical reflexes, and not with such vague inert abstractions as sensations and ideas, but with active purposive tendencies, impulses, desires, longings and strivings; and [p. 75] psychiatry at once began to make, and continues to make, great strides 15]
Descending from the most complex to the simplest forms of behavior, I may point out that the mechanical hypothesis fails to explain the very simplest instances of animal learning or adaptive behavior. I have shown that Dr. Watson's pretended explanation of such instances is entirely fallacious, and I have asked in vain for an answer. In the same book I have shown that the homing of animals cannot be explained by either of the only available mechanical hypotheses (that of reflexes and that of tropism), but only in terms of intelligent learning similar in nature to our own acquirement of knowledge; and I have in vain held up this very widely exhibited type of behavior as a challenge to the mechanists.
Dr. Watson and those who think with [p. 76] him are apt to regard a person like myself as an old fogey, a survival, a fossil, a figure that has stepped right out of the eighteenth or seventeenth or perhaps the fifteenth century, where he properly belongs. They think that we are medieval metaphysicians rather than men of science. But in reality it is Dr. Watson and Professor Loeb and their fellow mechanists who have the closed mind, who, without clearly knowing it, start out with a metaphysical assumption or prejudice which colors and shapes and limits all their thinking. It is they who are belated and befogged in the metaphysics of a bygone century. They commonly assume that they have behind them all the great force and authority of the physical scientists. But in this they are mistaken. It is not the physical scientists who are guilty of the error of trying to bring human nature within the narrow bounds of mechanistic science. It is biologists and psychologists without first-hand knowledge of physical science who do this. The great pioneers and leaders of modern physical science from Faraday to Clerk-Maxwell, Kelvin, [p. 77] Rayleigh and Einstein have avoided this error.
Professor Frederick Soddy, of
'I have no claim to call or express an opinion on the reality of the existence of intelligence apart from and outside of life. But that life is the expression of the interaction of two totally distinct things represented by probability and free-will is to me self-evident, though the ultimate nature of those two different things will probably remain, a thousand years hence, as far off as ever.'
It is noteworthy that Professor Soddy speaks of the physical world, not as the realm of strict mechanical determination and of exact predictability, but rather as the realm of 'probability.'
He goes on to say:
'It is simple now to indicate what to my mind are the two errors that hinder progress. Both are monistic obsessions due to the mind, in its innate [p. 78] desire to reduce everything to its simplest terms, ending by trying to reduce everything to its simplest terms. The first [error 18] links up the two ends of the chain running in diametrically opposite directions into a grand circle, and so gets the sublimated conceptions of the mental world inextricably mixed up with the physical. . . . The second error is perhaps more common in the sphere of economics. It may be called 'Ultra-Materialism,' and is the attempt to derive the whole of the phenomena of life by continuous evolution from the inanimate world. We begin with a nebula of primordial material condensing into ever more complex forms, first to the light and then the heavy elements, then to chemical compounds up to the complex colloid. By a continuation of the same processes such a complex results that it is continually decomposing and as continually regenerating itself. The inanimate molecules begin to live, and life then runs through its course of evolution up to man. This may satisfy a biologist, but it fails to satisfy me as a chemist. I cannot conceive of inanimate mechanism, obeying the laws of probability, by any continued series of successive steps developing the powers of choice and reproduction, any more than I can envisage any increase in the complexity of an engine resulting in the production of the 'engine driver' and the power of reproducing itself. I shall be told that this is a pontifical expression of personal opinion. Unfortunately, however, for this argument, inanimate mechanism happens to be my special study rather than that of the biologist [or psychologist 19]. It is the invariable characteristic of all shallow and pretentious philosophy to seek the explanation of insoluble problems in some other field than that of which the philosopher has first-hand acquaintance. The biologist has first-hand knowledge of animate [p. 79] mechanism and seeks the origin of it in colloid chemistry. The test of the hypothesis is not so much what the biologist as what the chemist has to say about it. The difference, to my mind, between dead and living matter is much like that between Niagara Falls thirty years ago and now (between the water falling according to the laws of mechanism or of 'probability,' and the water falling as directed and controlled by human purpose, human needs, desires, and strivings), and is not to be explained by the laws which Niagara formerly obeyed, by the laws of pure probability, but by their opposite, the operations of intelligence, as typified in their most rudimentary form by Clerk-Maxwell's conception of the 'sorting-demon.' . . . Life, or animate mechanism, is essentially to my mind a dualism, and any attempt to subordinate either partner is fatal. But the economist is peculiarly liable to mistake for laws of nature laws of human nature, and to dignify this complex of thermodynamical and social phenomena with the term 'inexorable economic law.' Is it any wonder that such crude confusions, such triumphs of mental instincts over reason, experience, and common-sense, have produced a general sterility of constructive thought.'
Professor Soddy adds:
'It is perhaps fortunate that we know nothing about the ultimate nature of the fundamentals of either the physical or mental worlds. We have pursued each so far as to know that both alike lead away from rather than toward the solution of the problems of life. The sublimated theoretical concepts in either case have long ceased to possess actuality. We have rather to find the interaction between their commonest forms, matter and energy on the one hand, and will and direction on the other.' [p. 80]
I recommend these reflections of a great physicist to the attention of Dr. Watson and his fellow mechanical psychologists; and especially the passage on 'shallow and pretentious philosophy' and that on the 'general sterility of constructive thought.' Let them, reclining in their armchairs, put them in their pipes and smoke them. So long as we think as though our thinking were the mere play of language mechanisms, so long will our thinking be shallow and pretentious, sterile and lacking in constructive quality. For language mechanisms are as sterile, as incapable of constructive or creative efforts, as all other mechanisms. No, it is not the great physicists that mistake their working hypotheses for ultimate laws of the universe. It is biologists and psychologists of the type of Dr. Watson who do that, and who dogmatically deduce from them the laws and limitations of human nature. [p. 81]
Dr. Watson asks: Suppose that presently a biological-chemist should put some [p. 82] inorganic matter into a flask and produce from it a living organism, what then will I say? I might fairly be content to reply that it will be time enough to deal with this case, when the feat shall have been accomplished. But I will go further. I will say, as Lotze said half a century ago, that the accomplishment of this triumph would not essentially alter the case. To suppose that it would do so shows logical incompetence. The achievement would merely show that the chemist had succeeded in bringing about such a collocation of matter and energy as is necessary for the manifestation of life.
Secondly, you will notice that Dr. Watson continues to harp on his main string, namely, his handling of young children. It is in the nursery that he claims the main triumphs of Behaviorism. Dr. Watson has made some valuable observations on the behavior of infants. It is on record, I believe, that he carried his infant to the zoölogical gardens, and there introduced him to each of the wild beasts in turn. And the baby merely stared and continued to suck his thumb, And, even when [p. 83] brought before the lion's den, the baby, although it was a true-born American baby, showed not the least trace of an innate tendency to twist the lion's tail; its supinator longus muscle showed never a quiver.
I do not wish to belittle these observations on infants
which Dr. Watson has so faithfully made and reported, and on which his great
reputation largely rests. They are important contributions to knowledge. But
It is natural enough that Behaviorism should claim its triumphs chiefly in the nursery; so long as we are dealing with young infants we are necessarily confined to Behavioristic methods of observation, because the child is unable to aid us with introspective reports. But that surely is a poor reason for refusing to make use of that aid when, in the course of development, it becomes, accessible to us. I am moved almost to break into song, to exclaim: 'Oh! Mr. Watson, what a funny man you are!'
Let me say one last word. If you are moved by a natural impulse of pity for Dr. Watson, as he continues to repeat his ineffective formulae and to butt his poor nose against the hard facts of human nature, if you are moved by the admiration due to the gallant leader of a forlorn hope, [p. 85] the stubborn defender of an indefensible position, then, I say, do not behave like mechanisms, but rather yield to these natural human impulses and vote for Dr. Watson, for Behaviorism, and for man as a penny-in-the-slot machine. Further, vote for him now; for you may never have another chance. After a few years, if my reading of the signs of the times is not wholly at fault, the peculiar dogmas for which he stands will have passed to the limbo of 'old forgotten far-off things and battles long ago'; they will have faded away like the insubstantial fabric of a dream, leaving not a wrack behind.
 I have here embodied the substance of remarks made in a debate before the Psychological Club of Washington, D.C., on February 5th, 1924.·
 In reviewing my Outline of Psychology in the pages of The New Republic Dr. Watson has asserted that it represents a lazy arm-chair type of psychologizing. The ground of this charge seems to be that it requires of the student a certain amount of hard thinking in the intervals between his bustling activities in the laboratory. Since such thinking may best be carried on in an arm-chair, I submit without reserve that more arm-chair work is the greatest need, not only of Dr. Watson, but also of very many other American students of psychology at the present time.
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