Diagnosis and Classification of Psychological Problems
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Transcript of Diagnosis and Classification of Psychological Problems
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Diagnosis and Classification of Psychological Problems
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Definitions of Abnormal Behavior Conformity to norms: Statistical
Infrequency or Violation of Social Norms
Subjective distress Disability or dysfunction
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Conformity to norms: Statistical Infrequency or Violation of Social Norms
A person’s behavior is abnormal if it is statistically infrequent (deviates significantly from the average is above the “cutoff point”
A person’s behavior is abnormal if it is very unusual
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Conformity to norms: Statistical Infrequency or Violation of Social Norms
Advantages Cutoff points are
quantitative Social norms seem
obvious and have intuitive appeal
Disadvantages There are few
guidelines for establishing cutoff scores
Number of deviations
Cultural relativity
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Subjective distress
A behavior or symptoms are abnormal if they causes the person distress?
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Subjective distress
Advantages Individuals who may
be distressed “inside” but not outwardly suffering, can be identified (can’t tell by looking)
Disadvantages Not all pathology
causes distress (e.g. conduct disorder or psychoses)
Difficult to determine the amount of subjective distress is needed to be labeled abnormal?
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Disability or dysfunction
A behavior is abnormal if it creates some degree of social (interpersonal) or occupational problems
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Disability or dysfunction
Advantages Requires little
inference These type of
problems often prompt treatment seeking
Disadvantages Difficulty
establishing standards for occupational or social dysfunction
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Diagnostic and Statistical Manual-IV-TR…The most widely accepted definition
used in DSM-IV-TR describes behavioral, emotional or cognitive dysfunctions that are unexpected in their cultural context and associated with personal distress or substantial impairment in functioning.
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Current Diagnostic Systems
In 1948 the World Health organization (WHO) added a section on classification of mental disorders to the International Classification of Diseases and Health Related Problems
ICD-10: current system developed in 1990
In 1952 the American Psychiatric Association developed and published its own Diagnostic and Statistical Manual
DSM-IV-TR was published in 2000
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Diagnostic and Statistical Manual: A Brief History DSM-I: (1952). A
glossary of descriptions of 60 diagnostic categories)
DSM-II (1968). Expanded list to 145 diagnostic categories but very similar to first manual in form
DSM-III (1980) Introduced many important changes (see next slide)
DSM-IV (1994). DSM-IV-TR (2000)
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DSM-III and DSM-III-R
Changes Not based on a specific
theory Presented explicit
diagnostic criteria Multiaxial system The specificity of
diagnostic criteria made it possible to examine the reliability and validity of diagnostic categories
Multiaxial SystemI. Clinical syndromesII. Personality disorders
and developmental disorders
III. Physical conditions (e.g. diabetes)
IV. Severity of psychosocial stressors
V. Highest level of adaptive functioning in the past year
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DSM-III: Shortcomings
Unacceptably low reliability in some diagnostic categories.
Hierarchical diagnostic system.
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DSM-III-R
Published in 1987 Eliminated some problems such as
hierarchical diagnoses
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DSM-IV and DSM-IV-TR
DSM-IV (1994)Revisions were based on
empirical data generated by DSM-III and DSM-III-R
ReorganizationAxis IV: Rating of severity of
stressors changed to a checklist
Axis V ratings changed to GAF (Global Assessment of Functioning)
1=Markedly poor functioning90= Superior functioning
DSM-IV-TROnly changes in the
descriptions of some of the disorders
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DSM-IV-TR Current diagnostic system Multiaxial: Axis I: Clinical Disorders Developmental Dis.(not mental retardation Axis II: Personality Disorders Mental Retardation Axis III: General Medical Conditions Axis IV: Contributing Problems Axis V: Rating of Functioning
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DSM-IV-TR: An example
13 year old Hispanic female Completing a gifted and talented program Feeling increasingly depressed, having
more suicidal thoughts Irritable, oppositional, and difficult to
manage Loss of energy, appetite Conflicts with peers and family Changed schools, father hospitalized
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DSM-IV Diagnosis
Axis I: Axis II: Axis III: Axis IV Axis V
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Diagnosis: Positive Aspects
•Facilitates communication (verbal shorthand)•Ensures comparability among identified patients•Promotes research on diagnostic features, etiology and treatment
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Diagnosis: Negative Aspects
Boundaries between disorders are often fuzzy
Gender bias in application of diagnostic labels
Negative effects of labeling on other’s perceptions
Negative effects of labeling on self-concept
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Gender Bias in Diagnoses
The gender of the patient influences the diagnosis, despite the presentation of equivalent symptoms
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Sex Bias in the Diagnosis of Borderline Personality Disorder and Posttraumatic Stress Disorder (Becker and Lam, 1994)
1. Subjects (n=1,082)
•Social Workers•Psychologist•Psychiatrists
2. Procedure•Case study with PTSD or BPD symptoms•Male and female cases•Clinicians rated case studies on a 7 point scale the extent to which a client appeared to have each of the Axis I and Axis II disorders
3. ResultsClinicians rated female clients higher for applicability of BPD diagnosis than male clients
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Negative Effects on Other’s PerceptionsRosenhan’s On Being Sane in Insane
PlacesExperimental Method 8 subjects Admitted to Psychiatric Hospital on the
basis of fake symptoms Upon admission they began to act
normally
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Rosenhan’s Procedure
Pseudo-patient complained hearing voices
No other alternation of history Everyone admitted with schiz.
Diagnosis After admission acted normally Had to get out by convincing staff they
were normal
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Rosenhan’s Results
Pseudopatients were never detected Each was discharged with diagnosis
of “schizophrenia in remission” Hospitalization varied from 7 to 52
days Common for other patients to detect
their sanity
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Implications from Rosenhan
Diagnoses carry personal, legal and social stigma
Results suggest that diagnostic labels create a negative lens for viewing the person
Diagnoses can lower expectations from others and from self