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Chapter 10 - Chapter 10 Personality Disorders Abnormal...

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Chapter 10 Personality Disorders Abnormal Psychology Spring 2011 Erika Coles, Ph.D.
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Clinical Features of Personality Disorders Personality disorders are characterized by: Chronic interpersonal difficulties Problems with one’s identity or sense of self Formerly known as “character disorders” 2
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Clinical Features of Personality Disorders DSM criteria include enduring pattern of behavior that is Pervasive and inflexible Stable and of long duration Cause clinically significant distress or impairment in functioning Must manifest in at least two areas: cognition, affectivity, interpersonal functioning, or impulse control 3
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Clinical Features of Personality Disorders Often cause significant problems in lives of others Gradually develop inflexible and distorted personality and behavior patterns Lifetime prevalence rate around 13% for at least one personality disorder Coded on Axis II of DSM 4
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5 Clinical Features of Personality Disorders Cluster A includes: Paranoid Schizoid Schizotypal Cluster B includes: Histrionic Narcissistic Antisocial Borderline Cluster C includes: Avoidant Dependent Obsessive-compulsive
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6 Clinical Features of Personality Disorders Prevalence studies suggest that about 10- 13% of the population meets criteria for at least one personality disorder at some point in their lives In DSM, personality disorders are coded on Axis II, rather than Axis I where almost all other forms of mental illness are coded About 75% of people with personality disorders also have an Axis I disorder
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7 Difficulties Doing Research on Personality Disorders Difficulties in diagnosing personality disorders Difficulties in studying the causes of personality disorders
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8 Difficulties in Diagnosing Personality Disorders Difficulties in diagnosing personality disorders are caused by a number of factors, including: Diagnostic criteria are not as sharply defined as for other Axis I categories Diagnostic categories are not mutually exclusive Personality characteristics are dimensional in nature
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9 Difficulties in Diagnosing Personality Disorders The five-factor model of personality PDs may represent extreme levels of normal personality traits. Examples: Histrionic—high extraversion and neuroticism Dependent—high agreeableness and neuroticism Obsessive-compulsive—high conscientiousness
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