Science and Great Experiments: The Search for Universals

The 1981 book Great Scientific Experiments by Rom Harré presents in popular format and in only 200 pages the gist of twenty influential scientific experiments, from Aristotle to the twentieth century.

Interestingly, none of the experiments cited uses statistical samples of any size divided into experimental and control groups. All samples are small and one is a sample of one! How is this possible?

And if true, may we conclude that Sigmund Freud and Jane Goodall were great experimenters?

It is the logical positivism of modern science that tells us a sound theory of induction does not exist, because universals do not exist, only statistical probabilities. Therefore, anything close to causal must be found through at least two groups of large samples to control sources of “extraneous variation.” Hence, all we can find through our many studies are “successive approximations.” This what John Stuart Mill’s followers called the hypothetico-deductive method that drives nearly all research today and condemns Freud and Goodall to the realm of “pseudo-science.”

Let us back up and define our terms. Science is a systematic study of an aspect of reality that explains its domain descriptively and causally, and if applied (as technology) provides guidance for human choices and actions to achieve specific goals.

The product of any science is a body of knowledge—a collection of integrated, universal concepts and principles the aim of which is to enhance life.

The second term to look at is experimentation. The Latin root of the word experiment means to try. Paraphrasing the Oxford English Dictionary, to experiment means to test or try something to identify what has previously been unknown. This means experimentation is trial and error. It may involve experimental and control groups (and the manipulation of one variable to determine its effects on another), but it does not necessarily have to. It also may involve an elaborate apparatus or it may be entirely conceptual—in the head, sometimes called a thought experiment.

Science historian John P. McCaskey has traced the history of induction and the role of experimentation in it  (1, 2). Up to the last couple of hundred years, McCaskey found, induction and experimentation were based on the work, among others, of Francis Bacon who based his work on Aristotle’s formal cause. And Aristotle in turn developed his theory of induction from what during the Renaissance was called “Socratic induction.”

Socrates, when taunting his know-it-all Athenian conversationalists, was looking for universal essences that apply in all instances.

Universals, those exceptionless concepts and principles, not correlations or probabilities, are what constitute the essence and foundation of science.

Thus, conceptualization, or concept formation, is the fundamental method of science, because large samples are often not necessary to identify the universals. McCaskey, as do I, gives the nod to Ayn Rand for understanding the role of concept formation in science, specifically the inductive process of identifying essential distinguishing characteristics.

Examples from McCaskey: Robert Koch’s identification of the comma bacillus (Spirillum cholerae asiasticae) as the defining, universal characteristic and cause of cholera, not such competing but correlational hypotheses as season or foul water; Charles Wells’ conclusion, after many small experiments to test a wide variety of independent variables, that water condensation was the essence of dew; and Lord Kelvin’s reasoning to describe tides by their definition and causes, namely “motions of water on the earth, due to the attractions of the sun and of the moon” (quoted in McCaskey).*

Harré acknowledges in his book (p. 191) that one or a few cases, with careful experimentation, that is, trial and error, can yield “defining properties of all samples similar to them.” He calls the small samples “intensive design.” In contrast, he calls the larger (and statistical) versions “extensive.”

The intensive design and sample of one in Harré’s book (chap. 2) is the nine years of experimentation conducted by army doctor William Beaumont on Alexis St. Martin, whose stomach did not close completely after a musket wound. Access to St. Martin’s stomach contents, especially his gastric juices, enabled Beaumont to answer the question, are gastric juices chemical solvents or is the process of digestion some vital force and the juices just “inert water”?

Feeding different foods to his subject and observing his digestive processes and by removing gastric juices to test its effects in a glass jar were the experiments that Beaumont conducted to make the well-respected conclusion of chemical solvency, even of “the hardest bone” (quoted in Harré, p. 41).

The concept correctly identified by Beaumont was that gastric juices were indeed—and universally so—chemical solvents, not inert water.

In my book Independent Judgment and Introspection (pp. 78-79), I praise Sigmund Freud for his work in clarifying and defining psychological repression and Jane Goodall for her discoveries about chimpanzees. Both conducted great experiments, the former in psychology, the latter in biology. They both used the method of conceptualization and deserve to be recognized as great experimenters. Science, in other words, is not confined to the fields of physics and chemistry, or imitations of those fields, as too many positivists are prone to assume.

Freud spent over thirty years in talk therapy with many different patients before he finally formulated the essential meaning of repression as an unconscious (or subconscious) response to anxiety that mutes the experience of or blocks entirely thoughts, memories, or emotions from conscious awareness. He also had to distinguish repression from defense mechanism in general, which for many years he tended to equate.**

Jane Goodall’s work, beginning in 1960, was to observe the behavior of chimpanzees in the Gombe Stream Chimpanzee Reserve (now Gombe National Park) in Tanzania. Over the course of many years, she discovered that chimps eat meat, make elementary tools to obtain food, can be violent and even cannibalistic, and have personalities. She gave the chimps names and interacted with them after they had gained her trust.

Goodall’s work required patient observation and, especially, application of analogous concepts from human psychology to the higher mammals, “patient observation” meaning testing and trying different ideas before drawing conclusions.

It is the logical positivists who dismissed Freud’s work as anecdotal at best, literature at worst. And it was the “men of hard science” at the beginning of Goodall’s career who dismissed her as an uncredentialed woman frivolously and anthropomorphically giving names to the nonrational, dumb animals. Paleontologist Stephen Jay Gould, however, called Jane Goodall’s work “one of the Western world’s great scientific achievements” (quoted in Goodall, p. xvii).

It is the logical positivists and many of those “men of hard science” who are not particularly scientific, or great experimenters!


* In the study of tides there may have been confusion over the difference between theoretical and applied science, or technology. Sea captains need to know the timing and heights of tides at a specific location, and statistics can help make these predictions. But this is applied science where the universals of theory are used to uncover correlations, tolerances, and averages to guide concrete, practical decision making.

** Repression is a defense mechanism, or defensive habit, as I prefer to call it, but it is not identical to it. Freud’s daughter, Anna, said it was in his 1926 book Inhibitions, Symptoms and Anxiety when Freud identified the correct place of repression in psychology. The muting or barring of an emotion is accomplished by muting or barring the thought that stands behind it. Traumatic memories, I have suggested (fn 11, p. 146), are not repressed and should not be thought of as part of the definition. Subconscious is the more preferred modern term and is discussed in my appendix to Independent Judgment and Introspection.