Discussion
I suspect most readers-quite understandably-will find Tyler’s feelings and beliefs frightening and disturbing. Yet there is a good chance that, examined clinically, Tyler would not be diagnosed with a DSM-5 mental illness. To be sure: Tyler is hardly a model of mental health. He is what many psychiatrists would call “emotionally disturbed” but not clearly “mentally ill.” His worldview is one of anger, resentment, victimization, and narcissistic grandiosity.
But Tyler is likely not psychotic or suffering from what psychiatrists would consider “serious mental illness,” such as schizophrenia, bipolar disorder, or major depression. Though Tyler may have
some features of one or more personality disorders (eg, paranoid or narcissistic personality disorder), he probably falls short of DSM-5’s Criterion C for general personality disorder (ie, “. . . clinically significant distress or impairment in social, occupational, or other important areas of functioning”).10(p645)
The critical term here is
clinically significant, which clearly requires careful judgment on the part of the psychiatrist, and on which point reasonable clinicians may disagree. On balance, I would place individuals with Tyler’s profile somewhere in the middle of the proposed continuum-perhaps somewhat “right of center.”
Mental illness/mental disorder
This, of course, is the portion of the continuum with which psychiatry has been most directly involved, and I needn’t elaborate, beyond noting a few important elements of mental disorders illustrated in the
Figure. First, as we move to the far right of our diagram, the likelihood of “disease-like properties” increases. Specifically, the condition begins to become “clinically significant” and-as the DSM-5 notes-is usually associated with “significant distress or disability in social, occupational, or other important activities.”10(p20) In addition, what I have called “core self-regulatory functions” decline steeply as we move to the far right. This includes the person’s
ability to “reality test;” maintain impulse control; engage in rational decision-making; carry out activities of daily living; and-to use Dr Robert Daly’s
term-
to secure one’s “prudential interests.”13
The more the person’s condition takes on disease-like properties, the greater the dysfunction and disability in these core self-regulatory functions. Finally, as we approach the level of clinically significant psychiatric disorder, we find properties common to disease and disorder throughout general medicine:
high syndromal coherence; good inter-rater reliability (kappa); substantial predictive validity regarding course and prognosis of one who meets the diagnostic criteria; familial and/or genetic correlations; characteristic biomarkers or biological abnormalities; and substantial suffering and/or incapacity.14,15
Classic psychiatric disorders that meet all, or nearly all, these criteria include schizophrenia and bipolar disorder.
Conclusion
The central consequence of the continuum described here is that-based on the best available evidence-most mass shooters would
not fall into the range of frank mental illness or disorder.2,3 This has critical implications not only for our everyday understanding of mass shooters, but also for forensic and legal determinations; for example, regarding use of the so-called “insanity defense” in cases involving mass shooters. This is not to say that serious mental illness, including psychotic conditions, plays no role in mass shootings. It’s likely that a small percentage of mass shooters do have bona fide mental disorders of psychotic proportions. But most-like our composite character, Tyler-are profoundly unhappy people whose worldview is shaped by “the 3 Rs”:
rage, resentment, and revenge.
Accordingly, when we psychiatrists are asked by the media, “How can someone who randomly shoots ten or twenty people not be mentally ill?”, we can reply by pointing out two things: first, that there is a distinction, however nuanced, between
PED and
mental illness; and second, that horrific violence on a mass scale is well within the range of socially deviant but psychiatrically “non-disordered” human behavior. Tragically, human history tells us that this has
always been so.16
Acknowledgment: Dr Pies would like to thank Dr James L. Knoll for his comments on an earlier draft of this article; Anna Chavez, PhD, for her comments on emotional disturbance; and Dr George Brownstone for stimulating discussion of these issues (personal communication, 8/30/19).
Next > Letter(s) to the editor
LETTER TO THE EDITOR
by Mark S. Komrad MD
Another beautiful essay. I have long agreed that a continuum is as important in psychiatry as it is in other fields of medicine (e.g. blood pressure, blood sugar, PSA etc). Frankly, I refer to Humpty Dumpty in Alice in Wonderland: “A word means whatever I want it to mean, no more or no less.“ I think the term “mental illness” (which incidentally isn’t even in the title of the DSM) means whatever people need it to mean in the specific context: clinical, political, advocacy, etc. Of course, without any other domains of validation for our constructs outside of clinical phenomenology, we will have to create workarounds like you’ve made in this article, that refer to “zones“ along a continuum, which is actually a watered down version of “categories.”
In the case, the young man believed : “I’m the only true-born leader who can purify this world of its filthy elements.”
Many might really see this as a cardinal symptom of grandiose delusions that crosses the line into the psychosis zone. Too bad that we don’t have another domain of validation to make that call, and it’s just one psychiatrist’s opinion versus another to decide that (which surely would be exploited in a courtroom).
You posed the common question: “if that’s not mental illness, what is it?“ It might be better posed: “if THAT’s not mental illness, then what IS mental illness?“
Warm Regards,
Mark
Mark S. Komrad MD
Faculty of Psychiatry, Johns Hopkins, Tulane, and University of Maryland
Response by the author
Many thanks on the kind assessment of my article, Dr. Komrad. You are raising some critical issues and questions in psychiatric nosology. First, I agree that the continuum/spectrum approach is usually more helpful than an iron-clad, categorical system, when assessing degree and nature of psychopathology. Hence, my diagram.
That said, I do think there is still a place for some categorical diagnoses, such as Schizophrenia, Bipolar I disorder, OCD, Alzheimer’s Disease, and maybe a dozen or so other DSM-5 categories. For these conditions, we generally do have ancillary "validators" besides clinical phenomenology, such as family history; genetic patterns, predictive validity of the diagnosis, response to medication (e.g., lithium for BPD), some “so-so” biomarkers, and, of course, in the case of Alzheimer's, actual brain pathology. But these are really the exceptions that prove the rule.
I actually think we have greater communal consensus on what the term "mental illness" means than would be suggested by our friend Humpty Dumpty! Although, as you indicate, definitions of “mental illness” (or “mentally ill”) will differ somewhat depending on the context and "need"--legal, clinical, etc.---I suspect that there are "family resemblances" among these variant definitions, to use Ludwig Wittgenstein's famous term. That is, there are common "fibers" that run through most definitions of "mental illness", even though there may be no single feature that all have in common.
The DSM-5, as you say, doesn't use the term "mental illness", though it provides a very broad and "elastic" definition of "mental disorder" on p. 20. (I have always found the term “disorder” to be very sketchy and evasive). One of the best definitions of “mental illness” that I have seen comes from “The Land Down Under.” Specifically,
the Australian Law and Justice Foundation defines “mental illness” as:
“…a condition characterized by the presence of symptoms such as delusions, hallucinations, serious disorder of thought form, a severe disturbance of mood, or sustained or repeated irrational behavior, which seriously impairs, either temporarily or permanently, the mental functioning of a person."
Not bad! But, here is where we meet the fly in the ointment: For there will always be disagreement as to what constitutes "serious disorder", "severe disturbance", "serious impairment", etc. We will always have differing notions of how to measure these terms; e.g., "how severe is severe?" etc. This means there will always be debates regarding how high or low the threshold for diagnosing "illness" should be. And in the end, these become pragmatic, if somewhat arbitrary, judgments. In this regard, psychiatry is not radically different from other medical disciplines; e.g., where do we draw the line between a cytologically “atypical” cell and a “malignant” cell? And at what level of systolic and diastolic elevation do we decide someone has “clinically significant” hypertension?
The Australian website also makes the additional astute point:
"Because the focus of clinical practice is on prevention and control of mental illness through treatment, clinical definitions of mental illness are far broader than their legal counterparts. It is rare to find a single definition in the clinical setting: in this context,
a definitive statement about what is mental illness is often less helpful than determining how a disorder should be classified and treated." [italics added]
Indeed, that speaks to the pragmatic and therapeutic rationale for diagnosis and classification.
Re: my composite case of "Tyler", Mark: you are right, of course, that his statement ( “I’m the only true-born leader who can purify this world of its filthy elements.” ) could be the kernel of a grandiose delusion. We'd have to "tease out" whether this is just "bravado" in a narcissistic-paranoid personality type-and does that amount to “mental illness”?--or is it a fixed, false belief, impervious to reason or "reality testing"? Unfortunately, we don’t have such fine-grained, clinical data for most mass shooters.
A number of psychoanalytically oriented clinicians, including forensic psychologist, Dr. Reid Meloy (who co-authored the
companion piece with Dr. James Knoll) believe that many, if not most, mass shooters, have a "Borderline Personality Organization" (a la Kernberg) that can veer over into frank psychosis, under certain kinds of stressors. [personal communication, Feb. 19, 2020]. "Tyler" could be one such type. Does that (borderline) personality organization per se constitute "mental illness", if it falls short of the DSM-5 criteria for Borderline Personality Disorder? (Dr. Meloy believes that is likely to be the case). Here, I think we verge on an essentially semantic debate, though it also impinges on the important clinical issue of “threshold” for “disease”, “illness”, etc.
Thanks again, Mark, for your very fruitful and heuristic comments!
Ronald W. Pies, MD
Disclosures:
Dr Pies is Professor Emeritus of Psychiatry and Lecturer on Bioethics and Humanities, SUNY Upstate Medical University; Clinical Professor of Psychiatry, Tufts University School of Medicine; and Editor in Chief Emeritus of Psychiatric Times
(2007-2010). He reports no conflicts of interest concerning the subject matter of this article.
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