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    <title>Skeptical Inquirer - Committee for Skeptical Inquiry</title>
    <link>http://www.csicop.org/</link>
    <description></description>
    <dc:language>en</dc:language>
    <dc:rights>Copyright 2013</dc:rights>
    <dc:date>2013-05-15T20:44:10+00:00</dc:date>    


    <item>
      <title>Phrenology and the Grand Delusion of Experience</title>
      <pubDate>Fri, 25 Jan 2013 16:01:00 EDT</pubDate>
	<author>info@csicop.org (<![CDATA[Geoffrey Dean]]>)</author>
      <link>http://www.csicop.org/si/show/phrenology_and_the_grand_delusion_of_experience</link>
      <guid>http://www.csicop.org/si/show/phrenology_and_the_grand_delusion_of_experience</guid>
      <description><![CDATA[
        



			<div class="image right"><img src="/uploads/images/si/dean-phrenology-artwork.jpg" alt="Phrenology artwork" /></div>


<p class="intro">In the nineteenth century, phrenology was hugely influential despite being totally invalid. Its history shows why we must be skeptical of any belief based solely on experience.</p>


<blockquote><p>Phrenology. The science of picking the pocket through the scalp.<br />&mdash; Ambrose Bierce, <em>The Devil&rsquo;s Dictionary</em>, 1911</p></blockquote>


<p>
    Today, phrenology (&ldquo;head reading&rdquo;) is usually seen as the fossilized stuff of cranks and charlatans. But in the nineteenth century it had a huge influence
    at all levels of Western society, more than all of its later competitors (such as psychoanalysis) put together. It was in&shy;fluential because of its
    attractive philosophy and because practitioners and clients <em>saw</em> that it worked. But we now know that it could not possibly work; personal
    experience had led millions of people astray. Indeed, few beliefs can match phrenology for its extent of influence and certainty of invalidity. So it has
    valuable lessons about any experience-based belief.
</p>
<h3>
    Phrenology&rsquo;s Influence
</h3>
<p>
    In the nineteenth century, phrenology affected all levels of Western life and thought. In Britain, Europe, and Amer&shy;ica, its influence was felt in
    anthropology, criminology, education, medicine, psychiatry, art, and literature. In France, it eroded established power and led to wide social changes. In
    Australia, it rationalized the violence against Abo&shy;rigines and explained the criminality of convicts. For ordinary people everywhere a head reading was
    often required for employment or marriage.<sup>1</sup> But how could this happen if phrenology was totally invalid? For answers, we need to start at the
    beginning.
</p>
<h3>
    First Steps to Delusion
</h3>
<p>
    Around 1790, the German-born anatomist Franz Joseph Gall, one of the founders of modern neurology, put together his skull doctrine that later led to
    phrenology. He held that behavior such as painting or being careful had their own specialized organs in the brain, and that they influenced the shape of
    the skull. So the skull&rsquo;s bumps would indicate behavior and abilities that were innate. Gall spent eleven years examining hundreds of heads to test his
    ideas: &ldquo;If ... he observed any mechanician, musician, sculptor, draughtsman, mathematician, endowed with such or such faculty from birth, he examined
    their heads to see whether he might point out a particular development of some cerebral part.... He also called together in his house common people, as
    coachmen and poor boys, and excited them to make him ac&shy;quainted with their characters&rdquo; (Spurz&shy;heim 1815, 271).
</p>
<p>
    Gall&rsquo;s seemingly logical approach had two fatal defects. First, his claims were often based on a single striking case, for example &ldquo;Cautiousness&rdquo; was
placed above the ears because an extremely cautious priest had a large bump there. Second, Gall looked only for <em>confirming</em> cases and ignored    <em>disconfirming</em> cases, a flaw not lost on his critics. Thus David Skae (1847), a physician at the Royal Edinburgh Asylum, noted that once the truth
    is &ldquo;fixed upon our minds,&rdquo; looking for confirmation is &ldquo;the most perfect recipe for making a phrenologist that could well be devised.&rdquo; But to Gall and the
    thousands of phrenologists who came later, personal experience mattered more than procedural defects. Phren&shy;ology had taken its first giant step on the
    road to delusion.<sup>2</sup> Note that the delusion of experience is not limited to artifacts of reasoning such as the Barnum effect.
</p>


<div class="image right"><img src="/uploads/images/si/dean-phrenology-diagrams.png" alt="phrenological diagrams" />How to read heads. For each &ldquo;brain organ&rdquo; (whose number and location depends on which book you read) you guess its development (no yardsticks here) and thus its meaning (based on speculation), which you juggle (more speculation) against all the other speculative meanings and the all-important temperament based on external signs such as build and vulgarity (i.e., on even more speculation) to obtain a final assessment of character and destiny. If unsatisfactory, try again. This was phrenology&rsquo;s secret weapon&mdash;it was based on an experience that could never be wrong.</div>


<h3>
    Spurzheim Nails the Coffin Shut
</h3>
<p>
The next step was due to Johann Spurz&shy;heim, Gall&rsquo;s coworker. Gall had linked brain organs to behavior, but Spurzheim held that organs cannot relate to    <em>behavior</em>, only to <em>traits</em>. Gall disagreed (the origin of traits was then a complete mystery), arguing that every person has imagination
    whereas not every person can paint. So in 1813, Spurzheim broke away. He renamed organs after the traits said to underlie behavior, invented organs to
    cover apparent gaps, and in due course adopted the name <em>phrenology</em> (a name suggested in 1815 by the naturalist Thomas Forster from the Greek words
    for <em>mind</em> and <em>discourse</em>). The focus was now on speculative divisions of the mind. Since behavior was now related more or less vaguely to
    several traits, and therefore more or less vaguely to several brain organs, everything was now open to interpretation. In one hit, Spurzheim had moved the
    system from a biological science to a mental philosophy; from observation to nonfalsifiability. It was the classic pseudoscientific move. Grand delusions
    were now inevitable.
</p>
<h3>
    Feel the Bumps, Know the Man
</h3>
<p>
    In those days, the workings of the brain were largely unknown. The idea of the four humors was still popular, as was bloodletting. Traits of ability and of
    character were held to be equal in all men at birth and were wholly determined by upbringing. To claim otherwise was a crime against morality and God.
</p>
<p>
    But phrenology <em>did</em> claim otherwise. It said traits were
    innate, localized in the brain, and measurable by head shape. What was once a mystery was now widely seen as an exact science. If true, it promised to
    revolutionize just about everything.
</p>
<p>
    But it was not true. Phrenology was partly right about brain functions being localized but wrong about the actual functions. Not slightly wrong; totally
    wrong. The brain involves <em>processes</em> such as moving, touching, hearing, and seeing, not phrenological <em>traits</em> such as neatness, curiosity,
    love of children, at&shy;tachment to home, and relish for food.<sup>3</sup> As shown by modern imaging techniques, some of these processes are localized in
    distinct regions, while others are distributed and interactive. But all are sufficiently diversified that brain damage or cell loss may have no noticeable
    effect. The same techniques have shown that the claimed phrenological organs do not exist.
</p>
<p>
    Nor is brain size a measure of power to the extent claimed by phrenologists. So we can look at phrenology knowing that a certain head shape cannot possibly
    mean what it is supposed to mean. Few beliefs about man can match phrenology for such certainty of invalidity.<sup>4</sup>
</p>
<p>
    Unsurprisingly, phrenology copped unceasing parody.
    A modern example appeared in the U.K.&rsquo;s <em>Independent Long Weekend</em> of January 11, 1997, suggesting how &ldquo;to improve people&rsquo;s personalities by
    rearranging their head bumps. With a mallet. Do not try this at home&rdquo; (p. 2).
</p>
<h3>
    Influence Revisited
</h3>
<p>
    What attracted millions of converts and made phrenology historically important was the appeal of its philosophy. By offering a recipe for living and
    self-improvement based not on metaphysics but on claims testable by ex&shy;perience, phrenology was a dream come true. And in the 1810s it took off like a
    rocket; first in Europe, then Britain, then America.
</p>
<p>
    The average life expectancy in Britain (adjusted for high infant mortality) at that time was forty years, a quarter of the population was illiterate, few
    homes had running water or even a clock, and a phrenology book cost a quarter of the average weekly wage. Yet in less than twenty years about thirty
    phrenological societies were formed, and roughly one person in 3,000 was &ldquo;moderately well instructed in phrenology, [more] than there are of persons
    equally advanced in geology, entomology, botany, astronomy, or similar sciences&rdquo; (Watson 1836, 223).
</p>
<p>
    But by implying that man rather than God was in charge, phrenology created an unceasing storm of religious and moral protest. Critics said it reduced the
    soul to anatomy and gave too much power to ordinary people. Never&shy;theless, it attracted people of in&shy;telligence and a vast responsive literature wherein
    every criticism was furiously attacked.<sup>5</sup>
</p>
<p>
    When critics said (in tracts of paralyzing wordiness) &ldquo;there is no evidence favoring phrenology but much favoring Christianity, so we prefer the latter,&rdquo;
    the reply was &ldquo;if there is no God, what is the organ of Veneration for?&rdquo; When critics said &ldquo;phrenology is without intellectual challenge and suits only the
    coarsest taste,&rdquo; the reply was &ldquo;it is so simple and natural that ordinary people can put it to immediate use.&rdquo;
</p>
<p>
    Soon there was a runaway demand for character readings, and by the 1840s phrenology had divided into two camps: one a fortune-telling scam where a
    travelling phrenologist could earn more in a week than in a whole year of farm laboring; the other a serious study whose journals were filled with alarms
    against the impostors. (The later parallel with newspaper astrology is unmistakable here.) Both camps promoted phrenology as a matter not of belief but of
    demonstration. Test-it-and-see was an essential part of the message. So how could an actually invalid phrenology survive such a process? First, a look at
    replies to stock objections.
</p>


<div class="image right"><img src="/uploads/images/si/dean-phrenology-pioneers.jpg" alt="images of pioneers of phrenology" />Pioneers of phrenology. From left: Franz Joseph Gall (1758&ndash;1828), Johann Spurzheim (1776&ndash;1832), George Combe (1788&ndash;1858), Orson Fowler (1809&ndash;1887), Lorenzo Fowler (1811&ndash;1896). Pictures are from Severn (1929, 244, 256, 257) and Davies (1955, 48, 49).</div>


<h3>
    Stock Objections
</h3>
<p>
    Phrenologists felt they had convincing replies to every stock objection: The skull varies in thickness. <em>Not enough to matter.</em> Everything relates
to size not quality. <em>Experience shows that phrenology works.</em> Stomachs digest different foods, so why can&rsquo;t brain organs do different things?    <em>Stomachs may be versatile but their function is the same.</em> Parts of the brain can be destroyed without apparent effect, so how can traits be
    localized? <em>The investigators were ignorant of phrenology and missed the relevant behavior.</em>
</p>
<p>
    But other objections were ignored. Organs could be in layers (so head shape could be meaningless?), the same organ appears on both sides of the head (so we
    believe with one and disbelieve with the other?), important traits such as sympathy and love of truth are missing, and worst of all <em>any</em> head can
    be made to fit <em>any</em> behavior so nobody could know if phrenology was wrong. For example, a small Combativeness could still be combative due to a
    large Firmness, a large Destructiveness, or a large Approbation (fights to gain admiration). Spurzheim&rsquo;s nonfalsifiability was working well. But
    phrenologists were not interested. Why worry when there were testimonials?
</p>


<div class="image right"><img src="/uploads/images/si/dean-phrenology-head-pictures.png" alt="phrenological head pictures" />Two heads typical of those in the above <em>New Illustrated Self-Instructor</em>. Arrowed is Parental Love large (left) and small (right), with spikes and dashed lines added by me to indicate Fowler&rsquo;s organ boundaries and average contour. The largeness or smallness extends beyond the boundaries on either side, which is contrary to the independence required by phrenology.</div>


<h3>
    Testimonials
</h3>
<p>
    Critics of New Age beliefs &ldquo;typically encounter anecdotes and testimonials where there ought to be rigorous pre- and post-treatment comparisons&rdquo;
    (Beyer&shy;stein 1990, 33). Phrenology provides a definitive test of testimonials because it had lots of them, even from the very top:
</p>
<p>
    &ldquo;I never knew I had an inventive talent until phrenology told me. I was a stranger to myself until then&rdquo; (Thomas Edison). &ldquo;The phrenologist has shown that
    he is able to read character like an open book ... with an accuracy that the most intimate friends cannot approach&rdquo; (Alfred Russel Wallace, cofounder of
    the theory of evolution). &ldquo;I declare that the phrenological system of mental philosophy is as much better than all other systems as the electric light is
    better than the tallow dip&rdquo; (William Gladstone, four times prime minister of England). All are from Severn (1913, 6).
</p>
<p>
    There were also countless testimonials from ordinary people. &ldquo;Scarcely a day passes that the editor of the <em>Phren&shy;ological Journal</em> does not receive
    some outburst of thankfulness from a grateful recipient of needed counsel&rdquo; (Sizer and Drayton 1899). &ldquo;35,000 testimonials&rdquo; said a sign in the window of a
    London phrenologist (see picture in Parker and Parker 1988, 34). How could 35,000 clients be wrong, to say nothing of Edison, Wallace, and Glad&shy;stone? The
    answer boils down to experience. And wishful thinking.
</p>
<p>
In 1929, the British Phrenological Society published thirty testimonials entitled    <em>The Revival of Phrenology: The Phrenological Principles and Localisations Confirmed by Modern Scientists</em>. None mentioned the results of actual
    tests, yet they supposedly showed that &ldquo;the main principles of phrenology can no longer be disputed.&rdquo;
</p>




<h3>
    Plainly Demonstrated
</h3>
<p>
    Yes, phrenology seemed to work. It was the apparent accuracy of readings that was so convincing to practitioners and clients. It was &ldquo;so plainly
    demonstrated that the non-acceptance of Phrenology is next to impossible&rdquo; (British Phren&shy;ological Association 1896, 64).
</p>
<p>
    For example, Severn (1929, 84) cites a reading of himself, made when he was twenty-five, that &ldquo;was a remarkably true description ... probably the best I
    have ever had.&rdquo; Here are some excerpts: &ldquo;Great firmness and reality of purpose. The mind is sensitive and active. The judgement is keen, and logical in its
    conclusions. He is not very original, but may be in his habits. Fond of reform and improvements of all kinds [note the contradiction]. He loves truth, and
    will have it at any price. The mind is sceptical and too honest to believe without reasonable evidence. A lover of moral and personal liberty. Is
    warm-hearted.&rdquo; More on this later.
</p>
<p>
    The phrenologist Stackpool O&rsquo;Dell (1925, 12) explains how &ldquo;in his daily experience, when he says that a child has unusual talent for drawing, he finds that
    it is so, or when he says of another that he has exceptional musical capacity, it proves correct.... He judges these points by the shape of the head,
    and a due consideration of temperament. And ... his conclusions, in most instances, will be recognised as strikingly correct.&rdquo;
</p>


<div class="image right"><img src="/uploads/images/si/dean-phrenology-book.jpg" alt="New Illustrated Self-Instructor in Phrenology and Physiology book cover" />1895 edition of Lorenzo Fowler&rsquo;s <em>New Illustrated Self-Instructor in Phrenology and Physiology</em>. It cost two shillings post free (then about one-fifteenth of the average weekly wage) and had 182 pages with over one hundred engravings of heads showing large and small organs. You felt your head, ticked fifty-one boxes on a seven-point scale, and looked up the details, some worthy of today&rsquo;s newspaper horoscopes as in &ldquo;Expect next to nothing, and undertake less&rdquo; (p.122). Including other editions, sales reached 100,000 in the United Kingdom and 150,000 in the United States.</div>



<h3>
    George Combe
</h3>
<p>
    The experience of George Combe, the most famous British practitioner of his time, seems even more convincing. In 1829, he visited a Dublin asylum to
    demonstrate phrenology to its doctors who, when his readings of selected in&shy;mates were over, compared them with their own diagnoses. For a male aged
    thirty-seven Combe found &ldquo;predisposed to melancholy&rdquo; versus the diagnosis &ldquo;melancholy, great timidity of disposition.&rdquo; For a female aged forty-eight Combe
    found &ldquo;self-esteem is predominant&rdquo; versus &ldquo;monomania, pride.&rdquo; There were sixteen hits as good as these, two nearly as good, one miss, and four passes with
    &ldquo;no grounds for inference.&rdquo; In general, the outcome was &ldquo;completely in harmony with what was anticipated.&rdquo; Combe&rsquo;s many visits to prisons and other asylums
    were just as successful (Williams 1894).
</p>
<p>
    In short, people saw how phrenology seemed to work and were convinced. Experience was the only game in town. But how could people be convinced if
    phrenology was totally invalid?
</p>
<h3>
    Encouraging Delusion
</h3>
<p>
    The problem in the above cases is that there are no controls to guard against delusion. In Severn&rsquo;s case, the reading is either very general (so anyone
    would agree with it) or is guessable from personal contact. In O&rsquo;Dell&rsquo;s case, we cannot tell if his hits are genuine or are due to circumstances, including
    not wanting to be seen disagreeing with a renowned phrenologist.
</p>
<p>
    This is similarly true in Combe&rsquo;s case, which allowed cueing by the subject&rsquo;s appearance and by sensing the attitudes of those present. Given a timid,
    fearful subject, or a proud disdainful one, together with reciting aloud the often opposing indications, and no doubt a practiced skill in reading human
    nature and onlookers, Combe could hardly go wrong. Indeed, he almost never mentions unobservable phenomena such as abilities, preferring things like
    melancholy (a term then applied to any personal distress) and propensity to thieving, both consistent with a dependence on cues. If this failed, the result
    could always be ex&shy;plained by an opposing organ, by up&shy;bringing, or by declaring that criticism comes from men and not Nature&mdash;and only Nature had the
    authority to say whether phrenology was true or not.
</p>
<p>
    Alternatively, failures could simply be ignored, as when Severn (1929, 83) visited O&rsquo;Dell and asked if he could be a phrenologist. &ldquo;He examined my head and
    pointed out so many mental faculties detrimental to my acquiring proficiency that I gave up further thought of qualifying professionally.&rdquo; Yet he became a
    top British phrenologist! Notice how easily the obviously wrong reading was ignored.
</p>


<div class="image right"><img src="/uploads/images/si/dean-phrenology-frontispiece.jpg" alt="Frontispiece to a seventy-two-page booklet provided with each reading by J. Millott Severn, the last major British phrenologist" />Frontispiece to a seventy-two-page booklet provided with each reading by J. Millott Severn, the last major British phrenologist, c. 1920. The booklet included interpretations on a seven-point scale for each of forty-nine brain organs. For five shillings (then about one-eighth of the average weekly wage) Severn (pictured) would tick the ones applying to you.</div>



<h3>
    Rare U-Turns
</h3>
<p>
    To their credit, not every believer remained a believer. American psychologist Herbert Spencer (1820&ndash;1903) practiced phrenology and invented a device to
    improve the measurement of cranial features, but he later abandoned phrenology as unscientific.
</p>
<p>
    The British botanist Hewett Wat&shy;son, author of the 1836 survey <em>Statistics of Phrenology</em>, was convinced of phrenology&rsquo;s validity. But after three
    years as editor of the <em>Phrenological Journal</em>, which &ldquo;obliged him to make more close scrutiny into various points,&rdquo; he saw that much &ldquo;is doubtful,
    if not erroneous.&rdquo; Given a choice between upsetting be&shy;lievers and promoting nonsense, he preferred to resign (Watson 1840).
</p>
<h3>
    Uncovering Delusion
</h3>
<p>
    The following study, the only one of its kind that I could find, shows how a simple control uncovers the delusion. A female patient aged twenty-two of
    Morgenthaler (1930), a Swiss psychiatrist, was amazed at the penetrating accuracy of her phrenological reading. It had twenty-six statements such as: &ldquo;You
    are a blend of natural feelings and much stronger emotions. You are a definite female, which explains your weaknesses. You are not sharply focused.
    Critical judgments give way to warm-hearted feelings.&rdquo; So Morgenthaler asked ten female subjects to judge how well each statement applied to them. An
    average of 70 percent said the statements were definitely or probably correct, 13 percent were uncertain, and 17 percent said they were definitely or
    probably wrong. It was the classic Barnum approach to instant delusion. The subjects knew the reading was not theirs; otherwise their acceptance might have
    been even higher.
</p>
<h3>
    Bird Brains Tell All
</h3>
<p>
    In the 1840s, the eminent French physiologist Pierre Flourens introduced the experimental approach that phrenologists had steadfastly rejected. He found
    that the intellect in pigeons and chickens gradually weakened as the brain was cut away, but still remained even when very little brain was left, which
    effectively demolished the claims of phrenology. A similar point had been made earlier by the American anatomy professor Thomas Sewall. So the need to test
    actual people disappeared, ironically just at the time when the rise of experimental psychology would have made such tests possible. But enough tests were
    made to confirm the expected negative results.
</p>


<div class="image right"><img src="/uploads/images/si/dean-phrenology-chart.png" alt="Cumulative number of phrenology titles published in Britain 1805-1930" />The cumulative growth of populations over their lifetime, whether of cathedrals or phrenology books, traces an S-curve that shows when the end is near. For phrenology this was around 1900. In the 1960s, historians became aware of phrenology’s importance in nineteenth-century life, and historical studies duly increased. Of course some people said phrenology would last forever. Thus in his 1898 book <em>The Wonderful Century</em>, Alfred Russel Wallace held that “in the coming century phrenology will assuredly attain general acceptance” (p.192). It was all part of the delusion inspired by experience.</div>


<h3>
    Experimental Tests
</h3>
<p>
    Some tests were obvious. When a phrenologist was given the supposed head cast of an eminent professor (it was actually the cast of a large turnip), the
    reading emphasized wisdom and intelligence (U.K.&rsquo;s <em>Times</em> newspaper, Febru&shy;ary 2, 1824). When the humorist Mark Twain visited Lorenzo Fowler (under
    a fictitious name) he was told he had no sense of humor, but on a repeat visit under his own name he had &ldquo;the loftiest bump of humor&rdquo; ever encountered
    (Twain 1959; Lopez 2002).
</p>
<p>
    Skae (1847), mentioned earlier, made a test that today would seem just as obvious. He went to the Phren&shy;ological
    Society&rsquo;s collection of head casts, picked ten famous cases &ldquo;whose character was well known,&rdquo; measured the elevation of each organ by calipers, and
    corrected it by the cube root of head size shown by immersion in water. &ldquo;I assumed that the measurements of the crania thus calculated would correspond
    with the known characters of the individuals, if phrenology was true.&rdquo; But the results were &ldquo;generally speaking at variance with phren&shy;ology, and in many
    instances so utterly irreconcilable with its truth, as to appear altogether subversive of it.&rdquo; The ten casts had not shown the bumps that phrenology said
    they should.
</p>
<p>
    The response by phrenologists to Skae&rsquo;s results was polemic, lengthy, and largely irrelevant. To them, the principles of phrenology were absolute;
    therefore, negative results were sure proof of incompetence. They said the correction for head size was inappropriate, and that the phrenologist&rsquo;s eye and
    hand were sensitive to nuances missed by calipers.<sup>6</sup> Skae then challenged them to get positive results from his data but they declined, arguing
    that the unsoundness of his measurements &ldquo;entirely vitiates every conclusion to which they have been supposed to lead.&rdquo;<sup>7</sup>
</p>
<p>
    Nearly eighty years later, Cleeton and Knight (1924) read physiognomy and phrenology books to find out what each cranial feature meant, but they found
    &ldquo;great disagreement.&rdquo; So they selected ten traits such as IQ, sociability, and willpower for which the disagreement was least. They then re&shy;cruited
    twenty-eight adults, measured their cranial features, and had their traits rated by twenty close associates who knew all twenty-eight subjects. The results
    showed no link between cranial features and traits. Of 201 correlations, four were significant (<em>p</em>=0.04) versus six expected by chance. The mean
    correlation was a negligible 0.004.
</p>


<div class="image right"><img src="/uploads/images/si/dean-phrenology-psychology.png" alt="psychology book covers with phrenology images" />Phrenology heads still provide an appealing and appropriate image for the covers of modern psychology books, here in 2001 and 2010.</div>


<h3>
    Slow to Die
</h3>
<p>
    The above tests confirmed that phren&shy;ology cannot deliver benefits beyond those due to non-phrenological factors. But phrenology was slow to die. In the
    1950s, phrenologists still existed in Britain and in the larger American cities (Dallenbach 1955). Today there is at least one pro-phrenology website, so
    supporters are not yet extinct.<sup>8</sup> But in practice, phrenology &ldquo;lasted only long enough to become one of the most thoroughly discredited theories
    in the history of physiological psychology&rdquo; (Uttal 2001, 102). It &ldquo;was the most popular of all the doctrines of psychology in the whole history of the
    science, and at the same time the most erroneous. It affords a striking example of the danger of erecting a vast superstructure on inadequate observation
    and inexact methods&rdquo; (Flugel 1964, 36&ndash;37). &ldquo;Eventu&shy;ally phrenology lost out to science and to public indignation, and degenerated into a sect of zealous
    extremists unable to pass on discredited knowledge to a new more enlightened generation&rdquo; (Van Wyhe 2002).
</p>
<h3>
    Neglect of Scientific Caution
</h3>
<p>
    It is easy to see why the scientifically invalid phrenology could have been so popular. To millions of people it was so fashionable and so satisfying, and
    its invalidity was so invisible, that it could not fail to work. Their experience of phrenology could not fail to be convincing. But it was a delusion. And
    all due to a neglect of scientific caution.<sup>9, 10</sup>
</p>
<p>
    We might hope that such neglect is less likely today. But the literature of any experience-based belief shows it to be raging out of control on every page.
    As with phrenology, believers refuse to accept that experience is unreliable; they brush aside contrary evidence and dismiss critics as bigoted and
    closed-minded. They don&rsquo;t want to know. Neglect of scientific caution is much more fun.
</p>
<p>
    For believers, the lesson is that experience means nothing without controlled tests. In the <em>Encyclopedia Britannica,</em> phrenology now occupies one
    paragraph whereas it once occupied many pages.
</p>
<p>
    For skeptics, the lesson is that the delusion of experience should never be underestimated. It dies only when believers die. Reformers should forget the
    present generation and target the next.<sup>11</sup>
</p><br />

<h4>
    Notes
</h4>
<p>
    1. The historical importance of phrenology was not widely documented until after the 1960s, when science historians became sensitive to social
    considerations. Today it has been minutely examined in scholarly books, articles, at least twenty PhD theses, and various websites, of which easily the
    most comprehensive is John van Wyhe&rsquo;s <a href="http://www.historyofphrenology.org.uk/" title="The History of Phrenology on the Web">www.historyofphrenology.org.uk/</a>. But these sources are invariably concerned with social issues and not the role of
    experience in the acceptance of phrenology. Indeed, the literature of phrenology is so clogged with side issues (of philosophy, of politics, of religion,
    of morality, of society in general), so often tedious to read (wordiness being the style of the day), and so hard to find (notwithstanding the many early
    publications now available online via the above website), that the role of experience has been largely unexamined. The source material for this article
    includes books and journals previously in the library of the British Phrenological Society and now held by the University of London.
</p>
<p>
    2. Jerison (1977) argues that Gall went wrong in the same way that others went right. Gall happened to pick the wrong hypothesis and spent the rest of his
    life trying to prove it. Ironically, Gall failed not because he was reductionist but because he was not reductionist enough. Had he reduced brain organs to
    simple things like toe-twitches and thumb-tingles, he would have found success because only such simple functions are localizable in the brain.
</p>
<p>
    3. The record for odd traits, albeit in physiognomy rather than phrenology, must go to Joseph Simms who, in a 600-page book running to at least ten
    editions by 1891, proposed Aqua&shy;sorbitiveness (love of water), Mnemoni&shy;conominality (ability to remember names, presumably the author had it),
    Morival&shy;orosity (moral courage), Philomonotopicalness (love of one particular place), Temporinaturalitiveness (appreciation of time passing), and many
    others.
</p>
<p>
    4. We have a certainty here well beyond that presently possible in, say, psychoanalysis. But we should not go overboard. Phrenology for all its faults led
    to the discovery that brain and mind were associated and that localization existed. Along the way it established <em>function</em> as a psychological term,
    popularized the expression of traits on scales such as one to five, and confirmed the futility of purely metaphysical speculations about the nature of man.
    Which is why phrenology appears in every history of psychology, unlike unproductive beliefs such as astrology.
</p>
<p>
    5. During 1801&ndash;1889, <em>The Index to the English Catalogue of Books </em>recorded a total of eighty-five phrenology titles versus sixteen astrology,
    fifteen physiognomy, and six palmistry (graphology did not appear until the 1870s in France). In 1928, after forty years of searching through libraries in
    America, Britain, France, and Germany, the phrenologist John Melville estimated that about 4,000 books and pamphlets had been published on phrenology
(Severn 1929, 438, 442). Best sellers included George Combe&rsquo;s <em>Constitution of Man</em> (500,000 in sixty years), Fowler&rsquo;s    <em>Phren&shy;ological Self-Instructor</em> (250,000), and Sizer and Drayton&rsquo;s <em>Heads and Faces</em> (150,000). For comparison, works by popular novelists
    such as Dickens typically sold 50,000 copies. Today the British Library has about 300 phrenology books and pamphlets, the New York Public Library about
    400.
</p>
<p>
    6. That the supposed sensitivity of the phrenologist&rsquo;s eye and hand led to delusion is shown by phrenology&rsquo;s golden rule, namely size=power. Other things
    being equal, the bigger the head the better. What could be more reasonable? Thus Severn (1913, 20), who in thirty years as a practicing phrenologist had
    examined more than 100,000 heads, or roughly fifteen each working day, says, &ldquo;Persons of commanding mentality invariably have heads above the average
    size.&rdquo; But ten scientific studies of IQ versus head size involving a total of more than 11,000 adults found a mean correlation of only 0.13 (based on data
    in Wickett et al. 1994), which is too small to be observable by phrenologists&mdash;indeed their observations should have denied it. So their claim was a case of
believing is seeing. Nevertheless their claim was not entirely wrong, for the correlation between IQ and actual <em>brain</em> size (as opposed to    <em>head</em> size) measured by magnetic resonance imaging is about 0.4 (Rushton 1997).
</p>
<p>
    7. Phrenology had one disadvantage seldom admitted by phrenologists, especially in their re&shy;sponse to critics, because &ldquo;In numberless in&shy;stances, [plaster]
    casts form our only source of phrenological observation&rdquo; (Hytche 1844). Most enthusiasts had a collection, in rare cases exceeding one or two thousand
    casts. But applying plaster of Paris to a thickly lathered and oiled head was quite unpleasant for the subject. The setting plaster prevented free
    respiration and generated much heat, whereupon some subjects &ldquo;become so nervous, that the features are distorted, and ... the very character of the head
    becomes changed.&rdquo; Due to bunched-up hair, or to expansion of the setting plaster, &ldquo;the cast is always larger than the head [in diameter by an inch or more]
    ... when we consider the additional energy conferred by every extra inch of healthy brain, we shall perceive how different will be our estimate of
    cerebral power.&rdquo; So when using casts, &ldquo;in ninety-nine cases out of a hundred our judgement is likely to be incorrect&rdquo; (Hytche 1844).
</p>
<p>
    8. The largest (and very user-friendly) pro-phrenology website is <a href="http://www.phrenology.org" title="The Phrenology Page">www.phrenology.org</a> operated out of Belgium. It proclaims &ldquo;Phrenology is a true
    science.... Today, much of the criticism against Phrenology can be easily dismissed. Extensive experimental verification of the Phren&shy;ological
localisations have proved their practical value.&rdquo; No experimental verifications are cited. Nearly 700 images, mostly of heads, can be found by Googling    <em>phrenology &gt; images</em>.
</p>
<p>
    9. Whether the price paid for such neglect is worth whatever satisfaction it brings, including keeping people off the streets, is a topic that skeptics
    might like to ponder. The problem of course is that a belief may be a crutch, but hearts are not won by kicking away crutches.
</p>
<p>
    10. The satisfaction brought to clients by a warm and sympathetic phrenologist should be self-evident. The satisfaction brought to <em>phrenologists</em>
    may be less evident but is beautifully ex&shy;pressed by Severn (1929, 504): &ldquo;It is a great career, and a splendid and glorious mission to be a phrenologist.
    There is life and vitality in the work, and though it may not yield big financial gains, in a thousand ways it will amply repay such as are adapted to the
    calling, and are desirous of doing great good in the world, and of being of immense service to their fellow creatures. I have frequently said that
    notwithstanding all the adverse circumstances I have experienced, if I had a hundred lives, I would devote them all ab&shy;solutely and wholly to phrenology.&rdquo;
</p>
<p>
    11. Among the exhibits at the Minneapolis Museum of Questionable Medical Devices are machines with a headpiece of thirty-two mechanical probes, each with
    five contact points to measure size on a five-point scale. In ninety seconds it will print out for each of thirty-two phrenological organs a brief reading
    with moral overtones. &ldquo;Secretiveness &ndash; Average &ndash; You are fairly secretive but can improve. You tell things to your friends. Don&rsquo;t do it.&rdquo; The readings are
    popular (fifty a day) and are billed as entertainment, but many people see them as accurate and are unwilling to accept that phrenology is invalid. The
    delusion of experience is alive and well. From McCoy (1985; 1996).
</p><br />

<h4>
    References
</h4>
<p>
    Beyerstein, B.L. 1990. Brainscams: Neuromyth&shy;ologies of the new age. <em>International Journal of Mental Health</em> 19(3): 27&ndash;36.
</p>
<p>
    British Phrenological Association. 1896. <em>The British Phrenological Year Book 1896</em>. London: British Phrenological Association. There were then 123
    practicing phrenologists in the United Kingdom. In 1967, after eighty years of existence, the Association went into voluntary liquidation.
</p>
<p>
    Cleeton, G.U., and F.B. Knight. 1924. Validity of character judgements based on external criteria. <em>Journal of Applied Psychology </em>8: 215&ndash;231.
</p>
<p>
    Dallenbach, K.M. 1955. Phrenology versus psychoanalysis. <em>American Journal of Psychology</em> 68: 511&ndash;525.
</p>
<p>
    Davies, J.D. 1955. <em>Phrenology Fad and Science: A 19th-Century American Crusade. </em>New Haven, CT: Yale University Press.
</p>
<p>
    Flugel, J.C. 1964. <em>A Hundred Years of Psychology</em>. 3rd edition. London: Duckworth.
</p>
<p>
    Fowler, L.N. 1895. <em>Fowler&rsquo;s New Illustrated Self-Instructor in Phrenology and Physiology. </em>20th edition. London: Fowler.
</p>
<p>
    Hytche, E.J. 1844. A glance at the imperfections of phrenological casts. <em>Phrenological Journal</em> 17: 246&ndash;253.
</p>
<p>
    Jerison, H.J. 1977. Should phrenology be rediscovered? <em>Current Anthropology</em> 18: 744&ndash;746. Title refers to accepting the place of phrenology in the
    history of anthropology.
</p>
<p>
    Lopez, D.J. 2002. Snaring the Fowler: Mark Twain debunks phrenology. Skeptical Inquirer<em> </em>26(1): 33&ndash;36
</p>
<p>
    McCoy, R.W. 1985. Phrenology and popular gullibility. <span class="mag">Skeptical Inquirer</span> 9(3): 261&ndash;268.
</p>
<p>
    &mdash;&mdash;&mdash;. 1996. Phrenology. In G. Stein (ed.), <em>The Encyclopedia of the Paranormal</em>. Amherst, NY: Prometheus Books.
</p>
<p>
    Morgenthaler, W. 1930. &Uuml;ber popul&auml;re Charak&shy;terdiagnostik. <em>Schweizerische Medi&shy;zinische Wochenschrift</em> 39: 912&ndash;914.
</p>
<p>
    O&rsquo;Dell, S.E. 1925. <em>Phrenology: Essays and Studies</em>. 2nd edition. London: London Phrenological Institution.
</p>
<p>
    Parker, D., and J. Parker. 1988. <em>The Future Now: How to Use Prediction in Your Life</em>. London: Mitchell Beazley.
</p>
<p>
    Rushton, J.P. 1997. Race, intelligence, and the brain: The errors and omissions of the revised edition of S.J.Gould&rsquo;s <em>The Mismeasure of Man</em>
    (1996). <em>Personality and Individual Differences</em> 23: 169&ndash;180.
</p>
<p>
    Severn, J.M. 1913. <em>Popular Phrenology</em>. London: Rider.
</p>
<p>
    &mdash;&mdash;&mdash;. 1929. <em>Life Story and Experiences of a Phrenologist</em>. Brighton: Severn. An endearing account of forty years of experience including how he
    married his wife on the basis of phrenology two months after meeting her, since when &ldquo;we have neither of us had the slightest reason to regret the step we
    had seemingly so hastily taken&rdquo; (p. 157).
</p>
<p>
    Sizer, N., and H.S. Drayton. 1899. <em>Heads and Faces and How to Study Them: A Manual of Phrenology and Physiognomy for the People</em>. New York: Fowler
    and Wells.
</p>
<p>
    Skae, D. 1847. Letter. <em>Phrenological Journal</em> 20: 273&ndash;283. Responses by phrenologists appear on pp. 43&ndash;48 and 283&ndash;290.
</p>
<p>
    Spurzheim, J.G. 1815.
    <em>The Physiognomical System of Drs Gall and Spurzheim Founded on an Anatomical and Physiological Examination of the Nervous System in General and the
        Brain in Particular and Indicating the Dispositions and Manifestations of the Mind</em>. London: Baldwin, Cradock and Joy.
</p>
<p>
    Twain, M. 1959. <em>Autobiography of Mark Twain Including Chapters Now Published for the First Time. </em>New York: Harper &amp; Brothers.
</p>
<p>
    Uttal, W.R. 2001. <em>The New Phrenology: The Limits of Localizing Cognitive Processes in the Brain.</em> Cambridge, MA: MIT Press.
</p>
<p>
    Van Wyhe, J. 2002. The History of Phrenology. Online at <a href="http://www.historyofphrenology.org.uk/" title="The History of Phrenology on the Web">www.historyofphrenology.org.uk/</a>.
</p>
<p>
    Watson, H.C. 1836. <em>Statistics of Phrenology, Being a Sketch of the Progress and Present State of that Science in the British Isles</em>. London:
    Long&shy;mans.
</p>
<p>
    &mdash;&mdash;&mdash;. 1840. Editorial. <em>Phrenological Journal</em> 13: 386&ndash;387.
</p>
<p>
Wickett, J.C., P.A. Vernon, and D.H. Lee. 1994. In vivo brain size, head perimeter, and intelligence in a sample of healthy adult females.    <em>Personality and Individual Differences </em>16: 831&ndash;838.
</p>
<p>
    Williams, W.M. 1894. <em>A Vindication of Phren&shy;ology</em>. London: Chatto &amp; Windus.
</p>




      
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