PSYCH 650 Week 1 Classification, the DSM and Assessment Example

Three Clinicians, Three Diagnoses: What a Crisis Unit Case Shows About the DSM, Reliability and Dimensional Alternatives

[Student Name]

University of Phoenix

PSYCH/650: Psychopathology

Week 1 Assignment

[Instructor Name]

[Date]

The crisis unit, its staff and the client are composites written for a model paper; diagnostic systems and research findings come from the sources listed.

Diagnosis organizes clinical work, guides treatment and determines insurance coverage. It also rests on human judgment applied to complex, changing problems. This paper examines classification and assessment through a case from the crisis stabilization unit where I work.

The Case

Ms. R., a twenty-six-year-old woman, was brought to our crisis stabilization unit in Phoenix by police after she called a crisis line describing thoughts of suicide following a breakup. Over four days, three clinicians evaluated her. The admitting psychiatric nurse practitioner diagnosed major depressive disorder, noting two weeks of low mood, poor sleep and hopelessness. A psychiatrist who reviewed her history, including a period last year of very little sleep, rapid speech and spending sprees lasting about five days, diagnosed bipolar II disorder. A therapist who met with her twice noted a long pattern of intense, unstable relationships, fear of abandonment, impulsive behavior and self-harm and diagnosed borderline personality disorder. Each diagnosis implied different treatment, and Ms. R. asked staff, "Which one is it?"

How the DSM Classifies

The current manual (American Psychiatric Association, 2022) treats a mental disorder as a cluster of problems in thinking, feeling or acting that signals something is not working inside the person and that usually brings suffering or trouble functioning. It classifies disorders categorically, listing criteria, such as a set number of symptoms over a set duration, with exclusions. The DSM aims to provide a common language for clinicians and researchers, guide treatment and support research and administrative uses such as insurance.

Assessment Methods

Diagnoses draw on several sources. Unstructured clinical interviews are flexible but vary widely across clinicians. Structured and semistructured interviews ask standard questions in a set order, improving reliability. Rating scales, such as depression inventories, quantify symptom severity. Psychological tests, including broad personality inventories, add standardized information. Collateral reports from family or records provide history the client may not recall. Observation over time reveals patterns that a single interview misses. At our unit, initial diagnoses usually rely on brief unstructured interviews under time pressure, with a client in crisis.

How Reliable Is Diagnosis?

Regier et al. (2013) reported results of the DSM-5 field trials in the United States and Canada, in which two clinicians independently evaluated the same patients at several academic medical centers. Reliability, measured by kappa, varied widely. Some diagnoses, such as major neurocognitive disorder, posttraumatic stress disorder and autism spectrum disorder, showed very good to good agreement. Others showed questionable reliability, including major depressive disorder and generalized anxiety disorder, with kappas around .2 to .3. Bipolar I disorder and schizophrenia fell in between. The authors argued that the field trials used realistic clinical conditions, which partly explains lower values than earlier trials.

Ms. R.'s case shows why. Clinicians saw her at different times, asked different questions and focused on different aspects of her history.

Each clinician saw a real part of Ms. R.; none saw all of her in a single conversation.

What Defines a Disorder

Behind the disagreement lies an older question: what makes a pattern of thoughts and behavior a disorder rather than a strong reaction to hard circumstances? Ms. R.'s low mood followed a breakup, and some of her impulsive behavior occurred while she was drinking. The DSM asks clinicians to judge whether symptoms exceed an expectable response to a stressor and whether they cause clinically significant distress or impairment. These judgments depend on the clinician's sense of what is normal for a person's age, culture and situation, which adds another source of variation. A clinician who sees her hopelessness as an understandable grief reaction may weigh her history differently from one who sees it as the latest episode in a recurring illness.

The Setting Shapes the Diagnosis

Crisis units create their own pressures. Clinicians must decide quickly about safety and medication, often with incomplete records and a client who is exhausted, frightened or intoxicated. Ms. R. described her history differently on day one than on day three, when she was calmer and more trusting. A diagnosis made at the door is a first hypothesis; the unit's procedures should treat it that way.

Comorbidity and Overlap

Ms. R.'s symptoms may fit more than one diagnosis at once. Depressive episodes occur in both bipolar disorder and borderline personality disorder; impulsivity and mood instability appear in both. Comorbidity, meeting criteria for several disorders, is common, and it raises the question of whether categories describe separate conditions or overlapping parts of broader problems.

A Dimensional Alternative

Kotov et al. (2017) proposed the Hierarchical Taxonomy of Psychopathology, which organizes symptoms empirically into dimensions at several levels. Specific symptoms combine into syndromes, which group into subfactors and broad spectra such as internalizing, which includes depression and anxiety; disinhibited externalizing, including substance use and impulsivity; antagonistic externalizing; thought disorder; detachment; and somatoform problems, with a general factor of psychopathology at the top. The authors argued that this structure accounts for comorbidity, improves reliability by using continuous measures and better reflects how problems co-occur.

In this model, Ms. R. would be described by elevated scores on internalizing and on disinhibition, rather than by choosing among three categories.

A Research Framework

Insel et al. (2010) announced a research plan at the National Institute of Mental Health that would stop sorting study volunteers by DSM label. Instead, researchers would measure basic systems, how people react to danger, chase rewards, control their thinking and read others, and would trace each system from genes and brain circuits up to behavior and what people say about themselves. The aim was to build a classification grounded in neuroscience and behavioral science that might eventually inform clinical diagnosis.

RDoC is not designed for clinical use today, but it suggests that Ms. R.'s difficulties with reward sensitivity, threat response and social processes could be studied directly.

Resolving the Disagreement

In practice, the team resolved the disagreement through structured assessment and time. A psychologist conducted a semistructured interview for mood and personality disorders, gathered history from Ms. R.'s sister and reviewed records from a previous hospitalization. The history of hypomanic episodes was confirmed, and borderline features were also present. The team documented bipolar II disorder with borderline personality features and planned treatment for both: mood stabilization and referral to dialectical behavior therapy.

Explaining Diagnosis to the Client

Ms. R.'s question, "Which one is it?", also deserved a direct answer. The psychologist explained that diagnoses are tools for choosing treatment, that her experiences fit parts of more than one description and that the team would keep learning about her over time. Ms. R. said this felt more honest than being handed a single label.

Implications

Diagnosis serves practical purposes, but it is a judgment that can vary. Structured interviews, collateral information and repeated assessment improve it. Dimensional models may eventually describe clients like Ms. R. more accurately.

Conclusion

Three diagnoses in one week reflected both the complexity of Ms. R.'s difficulties and the limits of categorical diagnosis under crisis conditions. Field trial data on reliability, a hierarchical dimensional taxonomy and a research framework built on functional dimensions each help explain the disagreement and point toward more careful assessment.

References

American Psychiatric Association. (2022). Diagnostic and statistical manual of mental disorders (5th ed., text rev.). https://doi.org/10.1176/appi.books.9780890425787

Insel, T., Cuthbert, B., Garvey, M., Heinssen, R., Pine, D. S., Quinn, K., Sanislow, C., & Wang, P. (2010). Research domain criteria (RDoC): Toward a new classification framework for research on mental disorders. American Journal of Psychiatry, 167(7), 748-751. https://doi.org/10.1176/appi.ajp.2010.09091379

Kotov, R., Krueger, R. F., Watson, D., Achenbach, T. M., Althoff, R. R., Bagby, R. M., Brown, T. A., Carpenter, W. T., Caspi, A., Clark, L. A., Eaton, N. R., Forbes, M. K., Forbush, K. T., Goldberg, D., Hasin, D., Hyman, S. E., Ivanova, M. Y., Lynam, D. R., Markon, K., ... Zimmerman, M. (2017). The Hierarchical Taxonomy of Psychopathology (HiTOP): A dimensional alternative to traditional nosologies. Journal of Abnormal Psychology, 126(4), 454-477. https://doi.org/10.1037/abn0000258

Regier, D. A., Narrow, W. E., Clarke, D. E., Kraemer, H. C., Kuramoto, S. J., Kuhl, E. A., & Kupfer, D. J. (2013). DSM-5 field trials in the United States and Canada, Part II: Test-retest reliability of selected categorical diagnoses. American Journal of Psychiatry, 170(1), 59-70. https://doi.org/10.1176/appi.ajp.2012.12070999