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It has been a singular privilege to preside over the BSHS as it celebrates its fiftieth anniversary. As we share our festivities with the British Association annual meeting at Leeds, I am doubly honoured to be giving this address. A fiftieth anniversary is a sentimental occasion. It is a moment when we can express our gratitude to our many friends and forebears who by their dedication have enabled the Society to grow and flourish. That so many of those friends should be with us to share in our celebration is a source of delight to us all. To our past presidents, former editors, officers and councillors, I extend the warmest welcome. And to our visitors and guests from overseas, I should like to say how much we value your presence and contribution to this conference.
Is there not, then, an incongruous note in my title – a hint of foreboding perhaps? If tempted to speculate on its source one might have wondered whether it is in those rumours we sometimes hear that the end of science is nigh. When we can almost clone humans and almost explain the moment of creation, what is there left? Might the end of science not spell the end of its history? A moment's reflection suggests that this cannot be. After all, the question why science should have come to an end when it did would still keep historians in business. And the more intriguing question of why the end of science has been proclaimed at the end of each of the last four centuries would keep us in business even longer!
In the late spring of 1947, the experimental physicist P. M. S. Blackett succumbed to the temptations of theory. At this time, Blackett (1897–1974) was fifty years old. He was a veteran of the Cavendish tradition in particle physics and he was on his way to an unshared award of the 1948 Nobel Prize for his experimental researches in nuclear physics and cosmic-ray physics. His photographs of cloud-chamber tracks of alpha particles, protons, electrons and positrons were well known to practitioners of particle physics, even as they now grace the pages of physics textbooks.
Blackett's turn toward theory in 1947 involved some risk for a well-established experimental physicist. The 3 May 1947 issue of Nature carried an announcement of his forthcoming lecture at the Royal Society:
Professor P. M. S. Blackett, Langworthy Professor of Physics in the University of Manchester, will deliver a lecture on ‘The Magnetic Field of Massive Rotating Bodies’ at a meeting of the Royal Society on May 15, at 4:30 p.m.
Blackett circulated a preliminary draft of his paper among colleagues in several different fields, including the geophysicist Sydney Chapman and the astrophysicist Harry Plaskett.
It was well said by Clerk Maxwell: ‘For the sake of persons of different types of mind scientific truth should be presented in different forms, and should be regarded as equally scientific whether it appears in the robust form and colouring of a physical illustration, or in the tenuity and paleness of a symbolical expression.’
From N. V. Sidgwick's Presidential Address to the Chemical Society, London, 1937
During the years between 1930 and 1950, chemistry underwent a transformation that affected both research and education. New subdisciplines like chemical physics and physical organic chemistry emerged, encouraging an influx of ideas and experimental techniques from physics. X-ray crystallography and other spectroscopic methods became indispensable for determining structures of atoms, molecules and crystals; such chemical concepts as valence and bond were refined within a new explanatory framework based on principles of physics; and the study of reaction mechanisms and rates became closely intertwined with that of structures and properties of chemical compounds. In conjunction with these changes, introductory chemical textbooks began to shift their emphasis from thermodynamic equations and solution theories to three-dimensional arrangements of atoms in molecules and types of chemical bonds. There is no doubt that the most important impetus behind this transformation was the development of quantum mechanics in the mid-1920s, and the most prominent among those who applied it to chemistry was Linus Pauling. And in Pauling's view, ‘the principal contribution of quantum mechanics to chemistry’ was the concept of resonance.
The entry of resonance into chemistry, or the reception of the theory of resonance in the chemical community, has drawn considerable attention from historians of science. In particular, they have noted Pauling's flamboyant yet effective style of exposition, which became a factor in the early popularity of the resonance theory in comparison to the molecular orbital theory, another way of applying quantum mechanics to chemical problems. To be sure, the non-mathematical presentation of the resonance theory by Pauling and his collaborator, George Wheland, helped to facilitate the reception; but this presentation was vulnerable to the confusion that arose among chemists owing to the similarity between resonance and tautomerism, or between foreign and indigenous concepts. The reception occurred at the expense of serious misunderstandings about resonance. This paper investigates the ways in which Pauling and Wheland taught, and taught about, the theory of resonance, especially their ways of coping with the difficulties of translating a quantum-mechanical concept into chemical language. Their different strategies for teaching resonance theory deserve a thorough examination, not only because the strategies had to do with their solutions of the philosophical question whether resonance is a real phenomenon or not, and whether the theory of resonance is a chemical theory or a mathematical method of approximation, but also because this examination will illuminate the role of chemical translators in the transmission of knowledge across disciplinary boundaries.
A History of Experimental Psychology was not the comprehensive work that Edwin Boring had envisioned. His original plan had been “to start with the men and the schools as an introduction and then to trace the history of experimentation and thought in the fields of sensation, perception, feeling, emotion, learning, memory, attention, action and thought.” Despite its title, the 1929 book contained only the introductory portion of the larger project, and Boring belatedly realized that he “had not yet got to the experimentation in experimental psychology.” Throughout the 1930s he worked on the conceptual and technical history of research in sensation and perception, which he considered the core of scientific psychology.
In addition to his historical research, Boring tried his hand at textbook writing. Concerned that introductory psychology books did not emphasize strongly enough the findings of experimental research, he collaborated with two longtime professional allies to produce Psychology: A Factual Textbook, published in 1935. Boring's coauthors were Herbert S. Langfeld, his predecessor at Harvard and then head of the psychology department at Princeton, and Harry P. Weld, a professor at Cornell whom he had known since before the First World War. All three men shared a strong positive bias toward the experimental tradition in psychology.
Seeking to produce “an authoritative text” that avoided wrangling over theoretical perspectives, the trio wanted the book “to be science but to have no special point of view.”
In May 1939 about fifty psychologists attended a reunion in New York City to reminisce about their service in the First World War. Many prominent psychologists were on the guest list, including James Angell, Walter V. Bingham, Truman Kelley, Beardsley Ruml, Walter Dill Scott, Edward Thorndike, Leonard Thurstone, John B. Watson, and Robert Yerkes. They gathered to celebrate the twentieth anniversary of their demobilization as members of the Committee on Classification of Personnel, which had directed the army's personnel system during the war, and to congratulate their former commanding officer, Colonel Walter Dill Scott, who was retiring after two decades as president of Northwestern University.
The event was organized by Walter Bingham, the former executive secretary of the committee who was currently serving as president of the New York State Association for Applied Psychology. Bingham had been a vigorous proselytizer on behalf of applied psychology since the Great War. No doubt aware of the increasingly ominous political situation in Europe, he used the reunion to start rebuilding the military psychology network. One colleague had suggested that a military representative be invited so that “a new tie can be forged which will be the [start] of putting the services of some of the old crowd at the disposal of the country, should the emergency arise.” Bingham followed up, and the army sent a lieutenant colonel from the Adjutant General's Office to the gathering.
While Lashley established his political point of view early in his career, and was never able or willing to shake it, the significance of maintaining such beliefs did change radically during the first half of the century. In the first few decades, through the 1920s, racist beliefs, even virulently racist, would hardly have been surprising. Racism was the expected and constant concomitant of the study of human biology, psychology, and anthropology. By the 1930s, however, this accepted norm had begun to erode; and by the early 1940s, for a variety of reasons, an atmosphere of antiracism had arisen in the biological and social sciences. It had become distinctly unfashionable to express racist views publicly or in one's science; life scientists were trying furiously to distance themselves from the notion that certain races were inferior to others.
In this chapter I will argue that even amid this shift toward the apolitical, the hereditarian assumptions that historically had always marked scientific studies of human differences persisted even after 1940. Lashley's work, particularly his participation in the NRC Committee on Human Heredity and his late interest in behavior genetics, conforms to this broader trend: a surface of neutrality, undergirded by an unshaken belief in the power of heredity.
In his controversies with Herrick and with Hull, we have seen how Lashley maintained a strictly biological approach to psychology, an approach that emphasized the hereditary shaping of behavior and rejected environmental influence. We have seen how he fashioned an image of himself as a “pure” scientist, focused on facts and “basic research,” equally unconcerned with theory and with social applications. We have seen how his biological approach and his self-proclaimed neutrality worked hand in hand as he argued against the reformist orientation of Progressive psychobiology and the environmentalism that underlay behaviorism. While both psychobiologists and behaviorists envisioned their science as a means of social engineering, as a tool for the rational management of people, Lashley avoided most of this rhetoric of control. He seems to have believed that the purpose of science should not be social betterment; and the absence of such betterment rhetoric from his work has allowed his neutral image to flourish.
In this chapter, I will show that Lashley's purist, biological standpoint led him not only into the two controversies already discussed, but also into a longstanding opposition to Freudian psychoanalysis. This opposition figured prominently during his tenure at Harvard (1935–1942), and led to the debacle that forced his withdrawal from active membership in the Harvard psychology department.
Three months after the creation of the Emergency Committee in Psychology in August 1940, the National Research Council sponsored a Conference on Psychological Factors in Morale. Twenty-five psychologists attended the two-day meeting, held in Washington. Gordon Allport, a social psychologist at Harvard who served as APA president in 1939, chaired the sessions. Organizational problems dominated the agenda, particularly the relation of the Emergency Committee to morale work. Discussion revealed a generational split, with younger members of the conference expressing some misgivings about organizing under the wing of the newly formed Emergency Committee. Allport thought the issue of morale merited wide consideration: “is not morale so gigantic a problem that it ought to feature large in the work of the NRC and not be located as a tail to the Emergency Committee's kite?” He argued that it might be best to “assemble a mixed group of social scientists” as a subcommittee.
Allport, slightly senior to the younger group of social psychologists, was well aware of his role as a representative of their interests in the psychological establishment. In addition to his prominent Harvard perch, he had been the first APA president to be identified with the field of social psychology. Before the conference, he had been involved in the Committee for National Morale, a civilian initiative organized by Arthur Upham Pope, a Persian art expert who had been active in similar efforts during the First World War.
Personnel work, ranging from the initial selection of soldiers to the rehabilitation of combat casualties, was at the center of psychologists' wartime effort. It absorbed the energies of the largest fraction of the profession and involved a large number of psychologists with no previous experience in test design, construction, and administration. Their work addressed the fundamental task of sorting manpower.
In the great triumvirate of personnel procedures – selection, classification, training – the third task presented a distinct set of challenges. Although existing mental testing techniques were readily adapted for the selection and classification of soldiers, as we have seen, it was less clear how psychology might contribute to the development of effective training procedures. Experimental psychologists, many of whom had previously worked mainly with animals, took up the challenge and applied their knowledge about sensation, perception, and learning to the problems of training people.
Almost from the start of the war, experimental psychologists were involved in applied research on the psychological problems engendered by modern weapons technology. Consciously or not, such weapons were designed with human operators in mind, and the engineers responsible for building them had to rely on some notion of human physical and psychological capacities. Some weapons, such as rifles, had evolved over such long periods that their basic configuration was set and largely unproblematic for the average user. Other technologies, such as range finders and fire-control devices on large shipboard guns, were newer, and the fit between the hardware and its human handler was not always good.
In April 1928, with the publication of A History of Experimental Psychology a year away, Edwin Boring wrote to Carl Murchison about his need for “facts concerning the scientific development of certain individuals” that could be obtained only from autobiography. Murchison, a psychologist at Clark University, was an active editor and publisher of psychology books and periodicals. Soon plans were laid to invite influential psychologists to contribute their life stories to a series of edited volumes entitled A History of Psychology in Autobiography. The rationale for the project was stated simply and directly: “Since a science separated from its history lacks direction and promises a future of uncertain importance, it is a matter of consequence to those who wish to understand psychology for those individuals who have greatly influenced contemporary psychology to put into print as much of their personal histories as bears on their professional careers.” The first volume, comprised of contributions from fifteen psychologists, was published in 1930. Two more volumes appeared, in 1932 and 1936, before the series was abandoned.
In 1952, not long after the publication of the second edition of A History of Experimental Psychology, the series was revived. Now Boring had his turn as a contributor, and he produced a remarkably candid account of his personal and professional life. He traced his career chronologically and ended with an attempt to put himself in perspective by outlining what he saw as the major aspects of his personality.
By 1944, only a decade after he led psychology at Harvard to independent departmental status, Edwin Boring faced a serious challenge to the status quo he had helped to create. Differences between what Boring called the “sociotropes” and the “biotropes” in the department were threatening to split the faculty into warring camps. The biotropes included Boring and his allies, who emphasized the more traditional and experimental parts of psychology, such as sensation, perception, psychophysics, and psychophysiology. In contrast, the sociotropes were more oriented toward the social sciences in their studies of social, clinical, and personality psychology. At Harvard they included Gordon Allport, Henry Murray, and their associates.
The wartime salience of sociotropic psychology emboldened Murray and Allport to join forces with their colleagues in anthropology and sociology to propose a new department that would focus on social behavior. They argued that existing institutional arrangements favored traditional experimental psychology and would not allow them to pursue their ambitious goal of a unified science of human personality, society, and culture. Although Boring had some sympathy for the sociotropic point of view, he was unwilling to make fundamental changes in the psychology department's program. That reluctance, coupled with efforts of sociologist Talcott Parsons and other powerful Harvard faculty members, led to the creation of the separate Department of Social Relations in 1945. Chaired by Parsons and with Samuel Stouffer directing the laboratory, it brought together sociologists, anthropologists, and psychologists interested in personality and social behavior.
As the American psychology community mobilized for national defense after the Nazi invasion of Poland in 1939, the possible contributions of female psychologists were overlooked or ignored. The exclusion of women became glaringly obvious at the joint annual meeting of the American Psychological Association (APA) and the American Association for Applied Psychology (AAAP) in September 1940, where reports on preparations for war dominated the discussions. Gladys Schwesinger, chair of the AAAP's Section of Consulting Psychology, disgustedly noted that, “as the list of activities and persons rolled on, not a woman's name was mentioned, nor was any project reported in which women were to be given a part.” Even worse, there was no promise that things would change. Some of the women protested, but with little effect. Summarily ignoring their professional status, the male leaders informed them that tradition favored the services of men in wartime. Women were supposed to “keep the home fires burning.” At best, they could expect to “wait, weep, and comfort one another.”
Unwilling to take no for an answer, about thirty of the women met to lobby for a role in mobilization efforts. They promptly confronted Robert Brotemarkle, the AAAP representative to the Emergency Committee, with two pressing questions. Would women be omitted from the National Register of Scientific and Specialized Personnel that was being collated? And would they gain representation on the all-male Emergency Committee itself?
The question at the heart of this study has a history of more than two thousand years; while it has invited solution after solution, it never seems to get solved. How is “the marvellous phenomenon of the mind” produced from “the enigmatic three-pound mass of tissue known as the brain”? How can chemicals, cells, electrical signals – in short, matter – give rise to our consciousness, our thoughts, dreams, hopes and fears? How can two such different categories of existence bear any relationship to each other, much less be born, live, and die together?
Why the mind-body problem has remained so peculiarly intransigent despite repeated attacks is in itself a question worthy of consideration; that it continues to invite attacks cannot be disputed. In his recent book Consciousness Explained, Daniel Dennett asked, “how could the brain be the seat of consciousness?” and then proceeded to give the following answer:
It turns out that the way to imagine this is to think of the brain as a computer of sorts. The concepts of computer science provide the crutches of imagination we need if we are to stumble across the terra incognita between our phenomenology as we know it by “introspection” and our brains as science reveals them to us.
An attempt to relate phylogenetic and individual differences in behavior to brain structure is therefore rather an adventure in correlating the mysterious with the unknown.
Karl Lashley
The Biological Approach to Psychology
Lashley's rejection of behaviorism involved not only a disavowal of the reflex theory, but also an equally strong denial of the importance of environmental influences on behavior. The anti-environmentalist emphasis of his argument is especially clear in his exchange of views with Walter S. Hunter in the Journal of General Psychology.
In 1930, Hunter published a criticism of Lashley's concept of cerebral equipotentiality, in which he claimed that Lashley's data did not demand a new theory of neural activity but rather conformed to the reflex arc theory. The central issue was whether behavior was peripherally or centrally controlled; with the behaviorists, Hunter argued that environmental stimuli, acting through the senses, determined behavior, while Lashley claimed that the central nervous system acted independently of the environment. Citing a great deal of evidence to prove that sensory stimulation controlled the various habits that Lashley's rats displayed, Hunter wrote:
[T]he results show that we are not justified in concluding, as Lashley does, that the maze habit [for example] is not controlled by any stimuli but by a central neural engram which unwinds, the figure of speech is mine, like some Victrola record when the rat is placed in the maze.
In 1940, Chauncey McKinley Louttit (1901–1956), a clinical psychologist from Indiana University, sought and received a commission from the U.S. Navy. As the navy's first psychologist, he hoped that war work would provide a way out of his professional frustrations. Louttit had done much to advance the cause of clinical psychology during the 1930s and was eager to broaden his already extensive networks. The author of a standard textbook in the field, published in 1936, he was involved in the founding of the American Association for Applied Psychology in 1937 and was serving as executive secretary of the group.
Louttit, trained as a comparative psychologist under Robert Yerkes in the late 1920s, was ambivalent about making a career in clinical psychology and entered the field reluctantly after graduate school as a temporary employment expedient. His career illustrates the marginal status of clinical psychology before World War II.
Louttit's first paid employment in psychology prefigured his later career. After receiving his bachelor's degree from Hobart College in 1925, he became an assistant to Stanley D. Porteus, director of research at the Vineland Training School for the Feebleminded, in New Jersey. Earlier, under Henry H. Goddard, Vineland had become one of the first sites for the use of psychological tests for the diagnosis and treatment of mental problems. After several months, Porteus recommended Louttit to Robert Yerkes for a graduate assistantship at Yale. The timing was fortunate.