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What is Abnormal Behaviour?
- Statistical Infrequency
- Violation of Norms
- Personal Distress
- Disability/Dysfunction
- Unexpectedness
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Lessons of History
1.Cycles of persecution, neglect and humanitarianism in the treatment of the mentally ill have occurred irrespective of the helping agency.
2.Periods in which people who exhibited psychologically disordered behaviour were persecuted and treated cruelly have often alternated with periods of humanitarian reform and care for suffering people.
3.Just as we now look back on what were once accepted treatments with revulsion, future generations may regard some of our more recent and current practices as cruel and inhumane.
4.Recent reforms may easily be reversed during adverse economic, political, and social conditions.
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Paradigms
- 1.Medical/Biological
- 2.Psychodynamic
- 3.Humanistic/Existential Paradigms
- 4.Behavioural
- 5.Cognitive
- 6.Integrative
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Biological/Medical Model
3 research areas:
Behaviour Genetics: study of individual differences in behaviour that are attributable in part to differences in genetic makeup
Molecular Genetics: attempts to specify the particular gene or genes involved and the precise functions of those genes
Neuroscience & Biochemistry in the Nervous System: role of neurotransmitters
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Biological/Medical Model
Goal of Treatment
Restore Chemical-Biological Imbalance
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Biological/Medical Model
Methods (Past and Present):
- 1.Bleeding, Leeches
- 2.ECT
- 3.Psychopharmacology
- 4.Bright-Light Therapy and Magnetic Stimulation
- Caveat: Reductionism
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Psychodynamic Approaches
mind is divided into three principal parts:
- Id
- operates on the pleasure principle
- seeks immediate gratification via reflex activity and primary process thinking
- Ego
- operates on the reality principle - mediates between the instinctual demands of the id and the demands of reality through secondary process, or logical planning
- develops defense mechanisms to control unacceptable id impulses
- Superego
- carrier of society's moral values as interpreted by one's parents
- introject (unconsciously incorporate) our parents’ values
- internal forces dynamic and their interaction gives shape to the person’s thoughts, behaviours and feelings 3 parts of personality often in conflict
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Psychodynamic Approaches: Classical Methods
- free association
- dream analysis
- latent content
- tranference
- counter-transference
- interpretation
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Developmental Stages
- oral
- anal
- phallic
- latency
- genital
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Defense Mechanisms
Repression – block anxiety-provoking feelings from conscious awareness and push into unconscious
- Displacement – channelling impulse toward another, safer person
- Denial – refuse to accept true source of anxiety
Reaction formation – converting one feeling, such as hate, into its opposite, love
Sublimation – redirect socially unacceptable impulses into acceptable ones
Rationalization – reinterpret undesirable feelings/behaviours in terms that make them appear acceptable
Projection – attribute undesirable traits to other people or objections
Regression - retreating into the behavioural patterns of an earlier age
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Psychodynamic Approaches
Goal:
to help patients understand unconscious factors that drive and control behaviour
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Humanistic approach
- free will and personal choice
- responsibility
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Humanistic Approach
Methods:
- self-actualization
- unconditioned positive regard
- empathy
- genuineness
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Existential
- anxiety is inevitable
- authenticity
- self-disclosure
- examine what provides a sense of meaning in life
- emphasizes uniqueness of individual
no proof that people are inherently good
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Behavioural Methodologies
- Contingency Management
- Token Economy
- Time-Outs
- Response Shaping
- Extinction
- Systematic Desensitization, Flooding, Exposure
- Aversion Therapy
- Assertiveness Training
- Biofeedback
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CBT: Goal
Goal to change clients’ thinking processes through cognitive restructuring in order to influence their emotions and behaviour
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Integrative Models: Diathesis-Stress
considers interaction of biological, psychological, and environmental factors
predisposing factors can be biological or psychological
mental disorder is triggered when a current stressor interacts with previously established diatheses
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Integrative Models: Biopsychosocial
biological, psychological, and social factors are conceptualized as different levels of analysis or subsystems that interact to effect human cognition and behaviour
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Basic Issues in Classification
- 1. Categories vs. Dimensions
- Categorical: yes or no decision – is it present or absent?
- Dimensional: continuous dimensions; emphasis on “how much”
- advantage of dimensional: can make subtle distinctions that would be otherwise lost
- 2. Monothetic vs. Polythetic Classes
- monothetic: small number of necessary and sufficient characteristics polythetic: set of criteria which are neither necessary nor sufficient – each person must possess a minimum number of these criteria, no one central feature that all members share
- inclusion criteria
- exclusion criteria: can rule out the category if certain conditions prevail
- duration of problem also important
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DSM-IV Axis
Axis I: Clinical disorders, including major mental disorders, and learning disorders
Axis II: Personality disorders and mental retardation (although developmental disorders, such as Autism, were coded on Axis II in the previous edition, these disorders are now included on Axis I)
Axis III: Acute medical conditions and physical disorders
Axis IV: Psychosocial and environmental factors contributing to the disorder
Axis V: Global Assessment of Functioning or Children's Global Assessment Scale for children and teens under the age of 18
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Types of validity
Face: items seem to make sense
Content: extent to which a measure samples the domain of interest
Criterion: degree of association between a test and a known criterion. Can be either concurrent or predictive
Construct: evidence that test measures what it should as shown in its pattern of relationships with other relevant and irrelevant measures. Includes convergent validity and discriminant validity
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Hans Selye’s General adaptation syndrome (GAS)
Phase 1: Alarm Reaction - ANS activated by stress
Phase 2: Resistance - damage occurs or organism adapts to stress
Phase 3: Exhaustion - organism dies or suffers irreversible damage
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