Clinical Psychology: A Brief Tour of the Field A Workshop for Members of the OSU Social Psychology Program Michael Vasey Ohio State University September 20, 2005
Transcript
Slide 1
Clinical Psychology: A Brief Tour of the Field A Workshop for
Members of the OSU Social Psychology Program Michael Vasey Ohio
State University September 20, 2005
Slide 2
Overview What is Clinical Psychology? Setting the Context:
Video examples Major Domains of Clinical Psychology Psychopathology
Classification Assessment Diagnosis and clinical decision-making
Intervention Treatment and prevention
Slide 3
What is Clinical Psychology? APA Division 12 definition (1991):
Clinical Psychology involves research, teaching, and services
relevant to the application of principles, methods, and procedures
for understanding, predicting, and alleviating intellectual,
emotional, biological, psychological, social and behavioral
maladjustment, disability and discomfort, applied to a wide range
of client populations.
Slide 4
Branches of Clinical Psychology: Trend Toward Increasing
Specialization The generalist training model is no longer
predominant Specialized graduate training programs are becoming the
norm: Examples: Clinical Child and Adolescent Psychology Clinical
Geropsychology Clinical Neuropsychology Clinical Health Psychology
Pediatric Psychology
Slide 5
Board Certification Specialties American Board of Professional
Psychology (ABPP) now lists 8 specialties relevant to clinical
psychology: Child & Adolescent Clinical Health Clinical
Neuropsychology Cognitive & Behavioral Family Forensic Group
Psychoanalysis More are undoubtedly on the way
Slide 6
Getting a Feel For the Territory: Some Case Examples Purpose:
To illustrate the great diversity of problems of living dealt with
in clinical psychology. Examples (based on DSM-IV categories):
Anxiety Disorders Affective Disorders Schizophrenia Borderline
Personality Disorder Bulimia Nervosa
Slide 7
Anxiety Disorders Most common mental disorders in the U.S. In
any given year, they affect 19% of the adult population in the U.S.
Most common to meet criteria for more than one at a time Anxiety
disorders cost about $42 billion each year in health care, lost
wages, and lost productivity
Slide 8
Anxiety Disorders Six major categories: Obsessive-compulsive
disorder (OCD) Generalized anxiety disorder (GAD) Panic disorder
and Agoraphobia Specific phobias Social anxiety disorder
Post-traumatic stress disorder (PTSD)
Slide 9
Social Anxiety Disorder Severe, persistent, and unreasonable
fears of social or performance situations in which embarrassment
may occur May be narrow talking, performing, eating, or writing in
public May be generalized general fear of functioning inadequately
in front of others
Slide 10
Social Anxiety Disorder Affects 8% of U.S. population in any
given year Women outnumber men 3:2 Often begins in youth and
persists for many years Can greatly interfere with functioning
Often kept a secret Fewer than 20% of sufferers seek treatment
Slide 11
Posttraumatic Stress Disorder (PTSD) Symptoms of PTSD:
Reexperiencing the traumatic event Flashbacks, nightmares Avoidance
Reduced responsiveness Increased arousal, anxiety, and guilt
Slide 12
Posttraumatic Stress Disorder (PTSD) Can occur at any age and
affect all aspects of life 4% of U.S. population affected each year
8% of U.S. population affected sometime during life Ratio of women
to men is 2:1 Some events are more likely to cause disorders than
others Examples: combat, disasters, abuse, and victimization
Slide 13
Dysthymic Disorder Depressed mood for most of the day, for more
days than not, for at least 2 years. Presence of at least 2 of the
following: Poor appetite or overeating Insomnia or hypersomnia Low
energy or fatigue Low self-esteem Poor concentration or diff.
making decisions Feelings of hopelessness Often punctuated by major
depressive episodes Called Double Depression
Slide 14
Borderline Personality Disorder People with this disorder
display great instability, including major shifts in mood, an
unstable self-image, and impulsivity Interpersonal relationships
are also unstable People with borderline personality disorder are
prone to bouts of anger, which sometimes result in physical
aggression and violence Just as often, however, they direct their
impulsive anger inward and harm themselves
Slide 15
Borderline Personality Disorder Many of the patients who come
to mental health emergency rooms are individuals with borderline
personality disorder who have intentionally hurt themselves Their
impulsive, self-destructive behavior can include: Alcohol and
substance abuse Reckless behavior, including driving and unsafe sex
Cutting themselves Suicidal actions and threats
Slide 16
Bulimia Nervosa Bulimia nervosa, also known as binge-purge
syndrome, is characterized by binges: Bouts of uncontrolled
overeating during a limited period of time Often objectively more
than most people would/could eat in a similar period
Slide 17
Bulimia Nervosa: Binges For people with bulimia nervosa, the
number of binges per week can range from 2 to 40 Average: 10 per
week Binges are often carried out in secret Binges involve eating
massive amounts of food rapidly with little chewing Usually sweet
foods with soft texture Binge-eaters commonly consume more than
1500 calories (often more than 3000 calories) per binge
episode
Slide 18
Bulimia Nervosa: Binges Binges are usually preceded by feelings
of tension or negative affect Although the binge itself may be
pleasurable, it is usually followed by feelings of extreme
self-blame, guilt, depression, and fears of weight gain and
discovery
Slide 19
Bulimia Nervosa The disorder is also characterized by
compensatory behaviors, which mark the subtype of the condition:
Purging-type bulimia nervosa Vomiting Misusing laxatives,
diuretics, or enemas Nonpurging-type bulimia nervosa Fasting
Exercising excessively
Slide 20
Bulimia Nervosa: Compensatory Behaviors After a binge, people
with bulimia nervosa try to compensate for and undo the caloric
effects The most common compensatory behaviors: Vomiting Affects
ability to feel satiated greater hunger and bingeing Laxatives and
diuretics Almost completely fail to reduce the number of calories
consumed
Slide 21
Major Aspects of Clinical Psychology Psychopathology
Classification Research on etiology, course, etc. Assessment and
Clinical Decision-Making Diagnosis Case conceptualization and
treatment planning Outcome evaluation Intervention Treatment and
prevention
Slide 22
Psychopathology The study of the origins, course, and
manifestations of mental or behavioral disorders. Classification:
The lynchpin of a scientific approach to psychopathology.
Slide 23
The Problem of Classification
Slide 24
Goals of Classification Definition of disorder constructs is
meant to describe and distinguish between problems in ways that
permit or lead to understanding of their: Behavioral,
psychological, social, and biological correlates Etiological and
maintaining factors Course Prognosis Treatment response
Slide 25
Characteristics of A Useful Diagnostic System Facilitates
Communication Possesses Etiological Validity Provides Reliable
Information on Disabilities, Abilities, Functional Impairments,
etc. Guides Research (homogeneous groups) Informs Treatment
Decisions Predicts Clinical Course
Slide 26
What Is Psychological Abnormality? Many definitions have been
proposed, yet none are universally accepted Most definitions,
however, share some common features The Four Ds Deviance Different,
extreme, unusual Distress Unpleasant & upsetting Disability
Causes interference with life Danger Poses risk of harm
Slide 27
Definitions Typically Involve Social Judgment
Slide 28
Wakefields Concept of Disorder as Harmful Dysfunction Meant to
reduce extent of social value judgment in definitions of mental
disorders. Harmful: Reflects a subjective value judgment that a
problem is unpleasant or undesirable. This means that some things
that are disorders in one culture, may not be in another if the
dysfunction does not cause harm in that culture. Dysfunction: A
supposedly objective feature. Dysfunction exists with a
physiological or psychological system fails to perform one of its
natural functions. Natural function: the function that it was
evolutionarily selected to perform.
Slide 29
But Even Dysfunction Has Subjective Component Wakefields
attempt to make definition of dysfunction objective fails Examples
of Specific Reading Disorder Reading cannot be the natural function
of whatever systems support it. Wakefield responds by saying the HD
analysis permits the harm to be an indirect consequence of the
failure. But this leads to serious problems for the HD analysis
because, when H and D are dissociated, all sorts of things end up
qualifying as disorders that are difficult to justify.
Slide 30
Lilienfeld & Marinos Example of Driving Disorder Lilienfeld
& Marino (1999) use Wakefields indirect harm rationale to
support Driving Disorder: The attribution of disorder to the
inability to drive is based on a line of reasoning roughly as
follows: 1) inability to drive is a significant harm, 2) the brain
was not designed specifically to enable people to learn to drive;
3) however, when all of a persons brain and motor systems are
functioning as they were designed to function, a side effect is
that the person can learn to drive; 4) therefore, the inability to
learn to drive (despite conducive environmental and motivational
circumstances) is caused by some underlying dysfunction of brain or
motoric system and is thus a disorder.
Slide 31
DSM-IV Published in 1994, revised slightly in 2000 (DSM-IV Text
Revision) Lists approximately 400 disorders Describes criteria for
diagnoses, key clinical features, and related features which are
often but not always present People can be diagnosed with multiple
disorders
Slide 32
Understanding DSM-IV: Some Definitions Sign/Symptom: single
behavior (sign) or subjective report of single characteristic
(symptom). By itself, a sign/symptom has multiple possible meanings
Syndrome: A group of signs and symptoms which covary systematically
Disorder: Syndrome with specified duration, and (hopefully) course,
prognosis, treatment response and etiology.
Slide 33
Assumptions of DSM-IV Neo-Kraepelinian Approach: Assumes mental
disorders are discrete entities separated from one another, and
from normality, either by: Recognizably distinct combinations of
symptoms and signs, and/or Demonstrably distinct etiologies Assumes
meaningful syndromes can be identified based on clusters created
based on similarity of symptom/sign topography. Ultimately, each
syndrome will be refined until it is homogeneous in terms of:
Etiology, course, treatment response, etc.
Slide 34
DSM-IV Definition of Disorder Each disorder is conceptualized
as: A clinically significant behavioral or psychological syndrome
or pattern Occurring in an individual That is associated with:
Distress OR Disability in one or more areas of functioning OR A
significant increase in risk of death, pain, disability, or
important loss of freedom Whatever its original cause, it must
currently be considered a manifestation of a behavioral,
psychological, or biological dysfunction in the individual. BUT
dysfunction is not defined Not merely an expectable and culturally
sanctioned response to a specific event.
Slide 35
DSM-IV Multiaxial System Axis I Clinical disorders Axis II
Personality disorders Mental retardation Axis III General medical
conditions Axis IV Psychosocial and environmental problems Axis V
Global assessment of functioning
Slide 36
Major Axis I Diagnostic Categories Anxiety disordersMood
disorders Disorders first diagnosed in infancy and childhood
Substance-related disorders Schizophrenia and other psychotic
disorders Delirium, dementia, amnestic, and other cognitive
disorders Mental disorders due to a general medical condition
Somatoform disorders Factitious disordersDissociative disorders
Other conditions that are the focus of clinical attention Eating
disorders Sexual and gender identity disorders Impulse-control
disorders Adjustment disordersSleep disorders
Slide 37
Axis II Disorders Mental Retardation Personality Disorders 10
categories Generally having poor reliability and validity Cluster
A: Marked by odd, eccentric behavior, including paranoid, schizoid
and schizotypal personality disorders. Cluster B: Marked by
dramatic, emotional behavior, including histrionic, narcissistic,
antisocial and borderline personality disorders. Cluster C: Marked
by anxious, fearful behavior and include obsessive- compulsive,
avoidant and dependent personality disorders.
Slide 38
Lifetime Prevalence of DSM Diagnoses (Axes I & II)
Slide 39
Are DSM-IV Classifications Reliable? DSM-IV has greater
reliability than any previous editions Used field trials to
increase reliability But reliability is still a concern Especially
for Axis II Personality Disorders and Childhood Disorders
Slide 40
DSM-IV has greater validity than any previous editions
Disorder-specific subcommittees conducted extensive literature
reviews and studies - But only for a subset of categories But
validity of many categories remains a serious concern Validity of
many categories inadequately studied. Especially Axis II
Personality Disorders Are DSM-IV Classifications Valid?
Slide 41
Problems With DSM Approach Individuals who share few
signs/symptoms receive the same diagnosis Example: Major Depressive
Disorder Of 9 criteria only 5 must be met. Must have either
depressed mood or loss of pleasure Plus 4 of remaining 8 features
But many of these specify several possibilities Examples: Insomnia
or hypersomnia; weight loss or weight gain; agitation or
psychomotor retardation; feelings of worthlessness or excessive
guilt Thus, any 2 MDD patients may be more different than
similar
Slide 42
Problems With the DSM Approach Within syndrome heterogeneity
presents a potential problem Even those people sharing the same
symptoms may vary in important ways: Example: Variable treatment
response Only about 50% of depressed patients respond to treatments
(both biological and psychosocial) DSM-approach responds by
dividing syndromes further or narrowing the diagnostic criteria.
But this can lead to excessively complex taxonomy We are at nearly
400 disorders and counting
Slide 43
Problems With the DSM Approach Original DSM-III disorders and
their lists of criteria were not founded on research Validity was
largely unknown Revisions have tended to preserve these
questionable disorders and criteria Improvements were begun in
producing DSM-IV Revisions based on: Comprehensive literature
reviews Analyses of existing databases Some new research (field
trials) But only for a subset of categories Further, the process
was rushed
Slide 44
Problems With the DSM Approach Comorbidity Comorbidity is the
rule single disorders are the exception Raises questions about the
distinctions between many categories Leads to problems interpreting
results because we are typically dealing with combinations of
disorders rather than one disorder at a time. Sub-clinical cases
DSM-IV is a dichotomous system Leaves unclear the status of those
who nearly meet criteria Also means diagnostic status can be a poor
outcome measure
Slide 45
Toward DSM-V Preliminary work has begun on DSM-V Series of
planning conferences have produced a monograph comprising 6 white
papers detailing a research agenda for DSM-V (Kupfer et al., 2002).
Produced under a partnership between the American Psychiatric
Association and NIMH Explicit goal: To provide direction and
potential incentives for research. Target date for DSM-V: 2010 Many
changes recommended in Kupfer et al. (2002) are unlikely to occur
until DSM-VI or even DSM-VII
Slide 46
Highlights of Kupfer et al. (2002) Enhanced reliability has
been obtained at the expense of validity. Exclusive reliance on
discrete categories has not produced a satisfactory system. No
biological markers distinguishing disorders have been found. High
degree of short-term diagnostic instability
Slide 47
Questioning the Categorical Approach Many have begun to argue
for a dimensional approach Especially in the case of PDs (Frist et
al., 2002). Cloninger (1999): There is no empirical evidence for
natural boundaries between major syndromes and that the categorical
approach is fundamentally flawed (pp. 174-175).
Slide 48
Questioning the Categorical Approach Examples: Research shows
anxiety and depression share much in common and may be better
conceptualized as points on a continuum of negative affect (Barlow,
2002) Even for severe disorders with high genetic loading like
schizophrenia, a dimensional approach may prove superior (e.g.,
Widiger & Sankis, 2000). Carson (1996) reviewed the lack of
progress in understanding schizophrenia and attributed it to use of
the DSM approach.
Slide 49
Reasons for Questioning the Categorical Approach Only a few
mental disorders have been shown to have distinct etiologies:
Examples: Down Syndrome Fragile X Syndrome PKU Alzheimers Disease
Most mental disorders appear to merge imperceptably into one
another and into normality (Kendler & Gardner, 1998) Examples:
Major Depressive Disorder Anxiety Disorders Schizophrenia Bipolar
Disorder
Slide 50
Reasons for Questioning the Categorical Approach Specific
underlying causes for each disorder category have not emerged. The
genetic and environmental factors underlying syndromes are
typically non- specific. Example: Genetic factors associated with
depression and anxiety overlap completely (Eley & Stevenson,
1999; Kendler et al., 1992)
Slide 51
Reasons for Questioning the Categorical Approach Treatments are
effective for a large number of diagnostic categories that are not
supposed to be all that similar Examples: SSRI drugs similarly
effective for depression, anxiety disorders, bulimia, etc.
Cognitive-behavioral therapy is effective for depression, anxiety
disorders, bulimia, etc. CBT for one disorder typically helps with
comorbid disorders as well.
Slide 52
What About a Dimensional Approach? Dimensional model of
psychopathology Advantages: No loss of information Full range of
severity preserved Complete coverage of all areas of behavior for
each case Reduced diagnostic overshadowing Could include strengths
as well as problems Improved validity Permits identification of
empirically-supported dimensions and clusters
Slide 53
What About a Dimensional Approach? Disadvantages raised in
defense of status quo: Complex But perhaps no more so than
categorical system with hundreds of categories Also, complexity is
dictated by the phenomena The extant research literature is based
on the categorical system of DSM. Expense of changing would be huge
Practitioners likely to resist So the advantages of a dimensional
approach will need to be large to support a change. Strong need for
dimensional models to be developed and compared to extant
categorical approach.
Slide 54
Personality Disorder Modifications PDs are probably the first
place well see a dimensional approach taken. If it is successful
and well-received by clinicians, then we may see it in at least
some Axis I disorders.
Slide 55
Problems with PD Categories Criteria fail to specify the
threshold for diagnosis Examples: Narcissistic PD symptoms/signs
include: Has a grandiose sense of self-importance But just what
qualifies as grandiose is not specified. Lacks empathy Just what
qualifies as a lack is not specified.
Slide 56
Problems with PDs PD diagnoses co-occur to a high degree.
Examples: Oldham et al. (1992) studied 100 patients at a long-term
care clinic for PDs Average patient met criteria for nearly 3 PD
diagnoses. Only 15% met criteria for only one PD
Slide 57
Problems with PDs Despite the high degree of overlap among the
10 PD categories Inadequate coverage of maladaptive personality
traits by DSM PD categories: PD NOS is often the most commonly used
PD diagnosis in clinical practice (e.g., Fabrega et al., 1991).
Diagnostic overshadowing is a problem Clinicians apply only 1
diagnoses when several are met (Adler et al., 1990)
Slide 58
PD Symptoms As Extremes of Normal Personality Traits The
symptoms of PDs are maladaptive variants of personality traits
found in the normal popualtion. Examples: The symptoms of
Borderline PD can be viewed as extremes of the traits comprising
Neuroticism/Negative Affectivity Many aspects of Antisocial PD can
be viewed as the low extreme of the Big 5 dimension of
Conscientiousness
Slide 59
What Might a Dimensional Scheme for PDs Look Like? 4-5 factors
appear to underly the symptoms of the 10 PDs 4 Factor Model
(Livesly et al., 1998) Compared phenotypic and genetic structure of
PD symptoms The same 4 dimensions appeared in the phenotypic and
genetic analyses: 1) Emotion Dysregulation; 2) Dissocial Behavior;
3) Inhibitedness; and 4) Compulsivity These closely resemble 4 of
the Big 5 factors Big 5 Factors fit well (Lynam & Widiger,
2001)
Slide 60
Example: Cloningers Approach Cloninger (2000): A PD is
diagnosed based on clinically low levels of traits related to
self-regulation Specific variants of PDs would be governed by
levels of other traits, such as: Novelty Seeking Harm Avoidance
Reward Dependence Persistence
Slide 61
Possible Addition of Relationship Disorders DSM has defined
disorders as residing within the individual. This has always been
problematic, especially for child disorders Example: Oppositional
Defiant Disorder typically reflects parenting problems so how does
it qualify as a disorder? First et al. (2002) call for addition of
Relationship Disorders to DSM-V Example: Marital conflict
Slide 62
Use of DSM in Non-Clinical Settings Rounsaville et al. (2002):
Call for redefinition of disorder criteria so they are truly
operationalized (like MR) Need to reduce reliance on clinical
judgment because of its attendant problems. Example: Depression
might be defined in part in terms of BDI score threshold.
Slide 63
But Categorical Versus Dimensional is an Empirical Question
Whether a problem is best approached as a dimension or a category
can be tested. Several methods available: Taxometric Analytic
Techniques Latent Class Analysis Likely that some problems are
dimensional but others are categorical
Slide 64
What Is the Structure of Psychopathology? Are
psychopathological problems continuous with the broader range of
individual differences? Do the same factors which contribute to
variation in the typical range of individuals also account for the
extremes? Or are such problems qualitatively distinct? Do they have
different etiology than individual differences in the broader
population distribution?
Slide 65
The Example of PKU PKU leads to MR unless affected individuals
are place on a special diet. But the value of this special diet
would be missed if we didnt know that individuals with PKU are a
discrete subgroup in the population of individuals with MR.
Slide 66
How Do We Find Out If a Syndrome is Dimensional or Categorical?
Nave assumption: Look for bimodality in distributions of the
characteristic(s) in question. But its not that simple: Few
characteristics correlate so strongly with category membership as
to produce non-overlapping or clearly bimodal distributions.
Bimodality is neither necessary nor sufficient to conclude a
construct is categorical.
Slide 67
Categorical vs. Dimensional Conditions 20 60 40 0
135791113151719 Frequency Scores (A) Dichotomy There are only two
levels, and all people are at one of those two levels
Slide 68
Categorical versus Dimensional Conditions 20 60 40 0
135791113151719 Frequency Scores 20 60 40 0 135791113151719
Frequency Scores (B)Dimensional Considerable variety across
population
Slide 69
Categorical versus Dimensional Conditions 20 60 40 0
135791113151719 Frequency Scores 20 60 40 0 135791113151719
Frequency Scores 20 60 40 0 135791113151719 Frequency Scores
Bimodal Distribution Variability within each category
Slide 70
Meehls Taxometric Approach Paul Meehl developed a set of
procedures for testing the categorical versus dimensional nature of
a construct. Bootstrap Taxometrics Provisional identification of
taxon members permits refinement of assessment methods. Example:
Choose items most strongly correlated with taxon membership
Slide 71
A Brief Introduction to Taxometrics The logic of taxometrics
can be illustrated by the example of biological sex: Suppose we had
a random sample of 50 men and 50 women And we measured the
following characteristics: Height, Baldness, and Waist to Hip Ratio
These would be correlated in our mixed sex sample but not in
samples of either men or women alone. Such indicators permit us to
find evidence for the discrete nature of biological sex using
taxometric procedures.
Slide 72
The Logic of Coherent Cut Kinetics: The Example of MAXCOV
MAXCOV (Maximum Covariance Method) MAXCOV examines the covariance
between pairs of indicators But first it cuts the sample up into
slabs based on their scores on a third indicator (i.e., the input
indicator) For example: A sample of 50 men and 50 women (N=100)
could be sorted in terms of Height and cut into 10 slabs. Slab 1
would be the 10 shortest subjects Slab 10 would be the 10 tallest
subjects The covariance of Baldness and Waist to Hip Ratio could
then be computed for each slab.
Slide 73
Sample MAXCOV Plot A peaked covariance curve reveals the taxon.
The position of the peak provides a means of estimating the taxon
base rate (about.50 in this case) The line would be flat in the
case of a dimensional construct. That is, the covariance would be
similar across slabs
Slide 74
Other Taxometric Procedures Maximum Eigenvalue Method (MAXEIG)
Similar to MAXCOV but can handle more than 3 indicators. Examines
the maximum eigenvalue of the first principal component instead of
covariance.
Slide 75
Other Taxometric Procedures Latent Mode Method (L-Mode) Factor
analysis is performed on indicators. Frequency plot of 1 st factor
scores should reveal bimodality of data if taxonic.
Slide 76
The Example of Psychopathy in Youth Psychopathy has been
studied as both a category and a dimension. Why does it matter? We
may miss important nonlinear relations if we approach a categorical
construct dimensionally and vice versa (see Farrington &
Loeber, 2000) Which it is has important implications for the ways
in which it is assessed Ultimately, it should reduce measurement
error and increase predictive power (Ruscio & Ruscio,
2002)
Slide 77
Results of Wootton et al. (1997)
Slide 78
Methods (Vasey et al., 2005) Sample: 386 youth ages 8-18 years
30% with significant antisocial behavior 5 putative indicators:
Subscales drawn from the Antisocial Process Screening Device (APSD;
Frick & Hare, 2001) CU, N, and ICP scales from Youth APSD N and
ICP scales from Parent APSD (the Parent CU scale did not correlate
sufficiently with the other 5 scales to be included)
Slide 79
MAXEIG Curves for Simulated Data Simulated Taxonic Data
Simulated Dimensional Data
Slide 80
MAXEIG Curves for Actual Data: Input Indicators 1 and 2 Child
ICP Child N
Slide 81
MAXEIG Curves for Actual Data: Input Indicators 3-5 Child CU
Traits Parent ICP Parent N
Slide 82
Summary of MAXEIG Results All 5 input indicators yielded plots
consistent with a low base rate taxon Avg. base rate =.08 (SD =.03)
Further, results were: Closely consistent with analyses of
simulated taxonic data Inconsistent with analyses of simulated
dimensional data.
Slide 83
L-Mode Curves for Simulated Data Simulated Taxonic Data
Simulated Dimensional Data
Slide 84
L-Mode Curve for Actual Data
Slide 85
Summary of L-Mode Results L-Mode results also suggested the
presence of a taxon Base rate =.04 Again, analyses of simulated
data supported the presence of a taxon.
Slide 86
Comparison of MAXEIG and L-Mode Results The two sets of
analyses suggest a taxon with a base rate of approximately.06 This
base rate is consistent with expectations for psychopathy within
this sample.
Slide 87
Implications To the extent that these results are replicated,
it will permit bootstrapping of the validity of indicators of
psychopathy in youth. e.g., it should permit identification of
optimal cut-off scores on the APSD or other measures. It may also
ultimately permit early identification of taxon members for
purposes of prevention or early intervention.
Slide 88
Other Taxometric Findings Some apparently categorical
phenomena: Dissociation Schizotypal Personality Some apparently
dimensional phenomena: Generalized anxiety Depression Bulimia
Slide 89
Factors Contributing to Psychopathology
Slide 90
Factors Emphasized in Current Research Biological Factors
Neuroscience research Behavior genetics Molecular genetics Strong
push to realize the potential of advances in these areas to enhance
understanding of psychopathology Social neuroscience research has
strong potential to make important contributions.
Slide 91
Factors Emphasized in Current Research Psychological Factors
Examples: Motivation and temperament Emotions and emotion
regulation Learning and cognition Examples: Social cognition The
self Strong emphasis on social cognition and personality in current
research Offers considerable room for contributions by social
psychologists
Slide 92
Factors Emphasized in Current Research Social Factors Examples:
Relationships and psychopathology e.g., Interpersonal theory of
depression (Coyne, Lewinsohn) Gender and gender roles Prejudice
Poverty Strong potential for social psychologists to make important
contributions regarding the roles played by such factors.
Slide 93
The Scientist-Practitioner Model
Slide 94
The Scientist-Practioner Model Call for clinical psychologists
to be scientists goes back to the earliest days of the field.
Witmer (1907) argued that the pure and applied sciences advance as
one what retards or fosters progress in one, retards or fosters
progress in the other. The Boulder Conference (1949) Formulated the
Boulder Model Scientist-Practitioner Model
Slide 95
Main reasons for joint training as scientists and practitioners
So students could develop interests in both research and practice,
despite the fact that most would concentrate on one or the other in
their careers. Underlying assumptions: Specialization in either
research or practice was seen as likely to contribute to narrowness
of thinking and rigidity of action. Direct involvement in clinical
work by researchers would foster their knowledge of important
clinical issues so they would be more likely to study them.
Slide 96
Main reasons for joint training as scientists and practitioners
The manifest lack of dependable knowledge in clinical psychology
and personality demands research be considered a vital part of the
field Research training seen as a means of separating fact from
fiction and identifying the kinds of solutions that were likely to
be permitted by the facts through application of: Critical thinking
skills Skills of empirical observation
Slide 97
The Growing Gap Between Scientists and Practitioners
Professionals in the 1960s increasingly complained that the science
half of the model involved training in research methods that were
of little use in answering important questions. Chicago 1965
Reaffirmed the scientist-practitioner model but showed the growing
tension by so broadening the definition of research (i.e.,science)
as to weaken it substantially. Vail Conference, 1973 Culminated the
trend toward rejection of science. The conference went far beyond
previous conferences Explicitly endorsed creation of professional
schools Suggested that the scientist-practitioner model should no
longer be the dominant training model in clinical psychology
Slide 98
Assessment
Slide 99
Clinical Assessment: How and Why Does the Client Behave
Abnormally? What is assessment? The collecting of relevant
information in an effort to reach a conclusion Clinical assessment
is used to determine how and why a person is behaving abnormally
and how that person may be helped Focus is idiographic on an
individual person Also may be used to evaluate treatment
progress
Slide 100
Clinical Assessment: How and Why Does the Client Behave
Abnormally? The specific tools used in an assessment depend on the
clinicians theoretical orientation Hundreds of clinical assessment
tools have been developed and fall into three categories: Clinical
interviews Tests Projective Tests Questionnaires IQ tests
Neuropsychological Tests Behavioral Observations
Slide 101
Requirements of Assessment Instruments Standardization Of
stimuli Of administration Of scoring Reliability Validity
Norms
Slide 102
Persistent Use of Tests Failing to Meet Psychometric
Requirements Projective tests remain widely used The Projective
Hypothesis The notion that highly unstructured stimuli, as in the
Rorschach, are necessary to bypass defenses in order to reveal
unconscious motives and conflicts. Such ambiguous stimuli require a
person to impose structure upon them. The way they do so may reveal
much about the person. Most such tests lack evidence for their
reliability and validity and lack norms. Rorschach is particular
focus of controversy
Slide 103
Rorschach Controversy Illustrates Ongoing
Scientist-Practitioner Conflict Roots of the Controversy: Principle
of Informal validation Klopfer held that informal observations by
individual interpreters were sufficient to demonstrate validity.
Principle of Intuitive Information Integration Klopfer held that
individual Rorschach scores do not usually bear a straightforward
relationship to personality characteristics but a skilled
interpreter can intuitively integrate the scores into a complete
picture This means that attempts to validate individual scores will
fail and that shouldnt concern us. This view is also taken by
current proponents They argue it is impossible to validate the
Rorschach using traditional psychometric approaches because each
individual is unique and no systematic rules can be given for the
intuitive integration process
Slide 104
Clinical Decision Making Clinicians are prone to a wide range
of cognitive errors and biases in clinical judgment situations.
Only by being aware of this susceptibility and taking steps to
address it can a clinician be as effective a decision maker as
possible. Decision aids be they actuarial formulas, treatment
manuals, etc., are an effective means of limiting such bias and
error.
Slide 105
Clinical Versus Actuarial Prediction Two approaches to making
decisions: Reliance on clinical expertise and intuition. This is by
far the preference of clinicians Practitioners tend to have strong
belief in the value of their own experience Use of actuarial
decision aids Use of formula based on empirically established
relations Note such formula dont exclude clinician judgments if
those judgments have value
Slide 106
Clinical Versus Actuarial Prediction Meehl (1954) first raised
the issue and established conditions for fair comparisons More than
100 studies to date Evidence overwhelmingly favors actuarial
approaches. Experienced clinicians are no more accurate than
novices
Slide 107
Why Dont Clinicians Develop the Expertise They Believe They
Have So why doesnt experience bring much improvement in clinical
judgmental accuracy? Cognitive biases and errors (universal to
human beings not specific to clinicians) Such biases and errors are
often a result of relying on judgment heuristics (shortcuts) that
often work well in everyday life, but which may lead to errors in
clinical judgment Such errors are most likely under conditions of
INFORMATION OVERLOAD Information overload: situation in which there
is a large amount of information and no way to determine what is
important and what is not Precisely the situation in clinical
assessment
Slide 108
A Sampling of Important Cognitive Biases and Errors
Confirmatory Bias Illusory Correlation Availability Bias Hindsight
Bias Overpathologizing Bias Overconfidence
Slide 109
Intervention
Slide 110
Interventions
Slide 111
Major Schools of Psychotherapy Eclecticism Both theoretical and
technical Cognitive-Behavioral Therapies Interpersonal Therapy
Psychodynamic Therapy Humanistic Therapy Existential and Gestalt
Therapy
Slide 112
Slide 113
The Effectiveness of Treatment Over 400 forms of therapy in
practice, but is therapy effective?
Slide 114
The Effectiveness of Treatment Is therapy generally effective?
Research suggests that therapy is generally more effective than no
treatment or than placebo Best estimate of average effect is Cohens
d .50 (Lipsey & Wilson, 1993) That means the average treated
person does better than about 66% of those in placebo condition
Efficacy compared to wait-list control averages Cohens d .70
Average treated person better off than 75% of controls.
Slide 115
Slide 116
Common Factors: An Important Source of Therapys Efficacy Frank
& Frank (1991) define common factors as including: Setting
designated as a place of help Therapeutic relationship With an
expert who is empathic, warm, supportive, and hopeful A conceptual
scheme or theory to explain the problem Compelling narrative may
promote mastery and control Therapeutic rituals Activities embedded
in the explanation offered May augment the persuasive power of the
narrative
Slide 117
The Dodo Bird Verdict Broad claim that all forms of
psychotherapy which contain common factors are equally effective.
Example: Wampold et al. (1997) Bona fide treatments differ hardly
at all in efficacy (d =.20) Conclusion based on meta-analysis of
head-to-head comparisons of bona fide treatments. But as
Crits-Christoph (1997) pointed out: Virtually all of the bona fide
treatments in Wampolds meta-analysis were CBT programs.
Slide 118
Some Treatments Are More Effective Than Others Effect sizes for
Cognitive-Behavioral Therapy (CBT) programs are generally quite
high: Barlows Panic Control Therapy Panic Disorder with Agoraphobia
Cohens d = 1.34 for avoidance and 1.87 for general anxiety. NOTE:
these are relative to PLACEBO Similar results for other anxiety
disorders and depression Examples: Exposure and Response Prevention
treatments for Obsessive-Compulsive Disorder (Foa) Group CBT for
Social Anxiety Disorder (Heimberg) Cognitive Therapy for Depression
Interpersonal Therapy starting to show similar results
Slide 119
The Empirically-Supported Treatments (ESTs) Movement APA
Division 12 Task Forces (1995) Task Force on Psychological
Intervention Guidelines Goal was to produce practice guidelines
Task Force on Promotion and Dissemination of Psychological
Procedures Goal was to help educate therapists about extant
treatments.
Slide 120
Categories of Efficacy (Chambless & Hollon, 1998)
Well-Established Treatment: When two independent studies show a
treatments efficacy compared to another treatment or to a placebo
control Assuming: The placebo condition was equally credible to the
treatment condition. The other treatment was implemented well.
Probably Efficacious Treatment: Treatments for which there are two
studies demonstrating efficacy as compared to no treatment and done
by independent research teams Promising Treatment: Treatments for
which there is only one study supporting a treatments efficacy, or
all studies conducted by only one investigative team.
Slide 121
The Infamous List of ESTs 1995 the first list identified 25
treatments as well-established or probably efficacious. 1998 71
treatments 2001 108 treatments for adults 37 treatments for
children
Slide 122
What Types of Treatments Are on the List? Mainly CBT-based
interventions CBT therapy has been allied with a research emphasis
since its inception Interpersonal Therapy for various problems also
now prominent on the list But other orientations are appearing The
emphasis on ESTs has stimulated research by proponents of other
approaches Example: Brief Psychodynamic Therapy
Slide 123
Important questions about empirically supported treatments:
Chambless & Hollon (1998) suggest consideration of: Efficacy:
Has the treatment been shown to be beneficial in controlled
settings? Effectiveness: Is the treatment useful in applied
clinical settings? Efficiency: Is the treatment efficient in the
sense of being cost-effective relative to alternatives?
Slide 124
Heated Debate Over EST List and the EST Movement Critics
predicted the list would be used by insurance companies and others
to limit payment This has happened Several states now limit
reimbursement to those providing ESTs (e.g., Hawaii, New Mexico)
Critics also charge that the movement: Interferes with innovation
Requires rigid adherence to manuals which may reduce efficacy
Slide 125
Levants Critique of Evidence-Based Practice (ESTs) Ron Levant
is currently APA president Prior to his election, he published a
critique of ESTs in nearly every state psychology associations
newsletter. He withdrew the critique in one case because the editor
planned to publish a reply by Larry Beutler
Slide 126
Levants Main Points ESTs generalize poorly Studies limited to
homogeneous samples that are unlike real-world patients. ESTs are
lacking for most DSM Axis I disorders Levant advocated giving equal
weight to three sources of evidence: Best research evidence With a
much broadened definition of what qualifies as research evidence
Clinical expertise Patient values
Slide 127
Beutlers Reply Evidence actually shows EST study samples and
real-world patient samples are quite similar If any difference
exists, it is that EST study samples tend to be more severe. ESTs
exist for most Axis I disorders Weighing clinical expertise and
empirical evidence equally ignores a vast literature on problems of
clinical judgment.
Slide 128
More Recent Debate Over Efficacy of ESTs Westen et al. (2004)
Controversial Psychological Bulletin article arguing that research
evidence for many ESTs is weak Specifically argued: Most studies
exclude 1/3-2/3 of patients who present for treatment. Excluded
cases are more difficult and more representative of real-world
cases ESTs reduce immediate symptoms but the average patient for
most disorders does notrecover and stay recovered (p 658).
Slide 129
Critiques of Westen et al. (2004) Two set of researchers
provide devastating critiques of Westen et al. Crits-Christoph,
Wilson, & Hollon (2005) Weisz, Weersing, & Henggeler (2005)
Both list many problems with the Westen et al. article Biased
review of EST research Failure to mention many findings
inconsistent with their arguments. Serious double standard in
evaluating evidence Inaccurate characterization of assumptions
underlying ESTs Example: Westen et al. argued that ESTs assume most
patients have only one problem Research actually shows that patient
samples in EST studies are very similar to patients seen in
community
Slide 130
Psychological Treatments (Barlow, 2004) Psychology has recently
identified itself as a health care profession Change has been
codified in APA bylaws Evidence supports the efficacy of many
psychological interventions Dissemination of these interventions is
proceeding slowly Barlow advocates a change in terminology from
Psychotherapy to Psychological Treatments to enhance
dissemination
Slide 131
Video Example of an EST Lars-Goran Osts Single Session CBT
program for specific phobia Woman in video has a severe snake
phobia Ost does graduated exposure in an extended session Current
theoretical basis for exposure therapy emphasizes cognitive change
Prevention of avoidance allows new information to be learned