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Psychotherapy research:
Summarizing the evidence and recent developments
ISPA 2013
Mick CooperProfessor of Counselling
University of Strathclyde, [email protected]
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Aims of talk1. Review what we know
about the effectiveness of therapy, and the factors that make it effective
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Aims of talk1. Review what we know
about the effectiveness of therapy, and the factors that make it effective
2. Highlight key contemporary developments and debates
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Revi
ewin
g wh
at w
e kn
ow
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Overall effectiveness
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Does therapy work?
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• Meta-analyses indicate medium tolarge positive effects: mean effect size (d) ≈ 0.4 – 0.6(Lambert, 2013)
• Shows greater ‘effect’ than many medical or surgical procedures
How well does it work?
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More therapy associated with more improvement - but of decelerating benefit
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And…• Therapeutic gains generally
maintained• People who do well tend to
keep on doing so• Cost-effective – particularly
where savings on in-patient costs
• Approximately 5-10% get worse
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What makes therapy
effective?
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Therapist’s orientation?
• Has been most controversial question in field
• Depends how you ‘cut the cake’?
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Empirically supported therapies perspective‘Which psychological methods are of proven effectiveness for particular psychological problems?’
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psychological problem
Empirically supported treatment
Depression CBTBehavioural marital therapyProblem-solving therapy Mindfulness-based cognitive therapyInterpersonal therapyProcess-experiential therapy
Specific phobias Cognitive therapyExposureApplied muscle tension
Post-traumatic stress disorder ExposureEMDR
Bulimia CBTInterpersonal therapy
Pathological gambling CBT
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More evidence ≠More effective
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‘Perhaps the best predictors of whether atreatment finds its way to the empirically supported list are whether anyone has been motivated (and funded) to test it and whether it is readily testable in a brief manner’ (Westen et al., 2004)
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Comparative outcome studies
• Most studies comparing different method show no (or only small) differences between therapies…
• Especially where both therapies bona fide and/or allegiance effects controlled
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0
5
10
15
20
25
30
Baseline 4 months
BD
I sco
re Non-directive counselling
CBT
Comparison of CBT and non-directive counselling (King et al.,
2000)
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Pre
-pos
t diff
. in
CO
RE
-OM
sco
re
CBT PCT CBT+1 PDT +1PCT+1PDT(psychodynamic)
Mor
e im
prov
emen
tComparison of outcomes for 1309 clients in UK primary care (Stiles et
al., 2006)
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The ‘Dodo bird’ verdict
• ‘Everyone has won and all must have prizes’
• Wampold (2001): Less than 1% of variance in outcomes due to orientation
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Therapist factors
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‘Supershrinks’ and
‘pseudoshrinks’
• One study found that clients of most effective therapist improved 10x greater than average; clients of least effective therapists got worse
• Approx. 5% of variance in outcomes seems due to specific therapist
• But why?
Some therapists have significantly better
outcomes than others
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Professional characteristics
• Most professional characteristics only minimally related to effectiveness:–Training–Status (e.g., professional vs.
para-)–Experience as therapist–Life-experience –Amount of supervision
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Personal characteristics
• Effectiveness also not strongly linked to: –Personality characteristics–Level of psychological wellbeing
(including amount of personal therapy)
–Gender–Ethnicity–Age
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Therapist--client matching
• Clients from marginalised social groups and/or with strong values may do better with therapists who are similar
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Rel
atio
nal
fact
ors
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Technique and model factors15%
Client variables and extratherapeutic
events40%
Expectancy and placebo effects
15%
The therapeutic relationship
30%
‘Lambert’s pie’: % of improvement in therapy as function of therapeutic
factors
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‘Promising but insufficient research’1. Congruence/genuineness2. Repairing alliance ruptures3. Managing countertransference
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‘Probably effective’ elements1. Goal consensus2. Collaboration3. Positive regard
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‘Demonstrably effective’ elements of the relationship (Norcross, 2011)
1. Therapeutic alliance2. Cohesion in group therapy3. Empathy4. Collecting client feedback
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Collecting client feedback
• Major new development in field: e.g., Lambert, Miller, Duncan
• Services track individual outcomes, and feed back to therapist if deterioration
• Also, ‘process’ and relationship feedback
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Matching/tailoring that make a ‘demonstrable’ difference(Aptitude-treatment interactions,
ATIs)1.Reactance levels2.Preferences3.Culture4.Religion and spirituality
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So is it the relationship that heals?
• Correlations between factors and outcomes not evidence that former causes latter
• Evidence for self-help therapies indicates that relationship not always necessary
• Quality of therapeutic relationship not determined by therapist alone…
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Clientfactors
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'Lambert's pie'Estimate of Percentage of Improvement in Psychotherapy
Clients as a Function of Therapeutic FactorsTechnique and model factors
15%Client variables and
extratherapeutic events40%
Expectancy and placebo effects
15%
The therapeutic relationship
30%
Client factors
= 70% +
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Clients’ participation
• Possibly ‘the most important determinant’ of outcome (Orlinsky)
• Positive outcomes associated with:– Involvement–Active choosing of therapy–Realistic expectations–Motivation
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Capacity to ‘use’ therapy
• Better outcomes associated with ‘better’ psycho-social functioning:–Secure attachment style–Higher psychological mindedness–Absence of ‘personality disorders’–Lower perfectionism–More advanced stage of change–Greater social support
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• Therapy seems to work by helping clients to capitalise on their strengths, rather than compensating for the ‘deficiencies’
Capitalisation vs.
Compensation
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Deba
tes a
nd
deve
lopm
ents
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The active client
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Client agencyClient engagement with therapy increasingly recognised as principal driver of therapeutic change
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Therapist as healer
Therapy
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Therapist as catalyst
Therapy
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“It is the client more than the therapist who implements the change process. If the client does not absorb, utilize, and follow through on the facilitative efforts of the therapist, then nothing happens. Rather than argue over whether or not ‘therapy work,’ we could address ourselves to the question of whether ‘the client works.’” (Bergin and Garfield, 1994)
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Client agency• Emphasis on active client is highly
compatible with counselling psychology values
• But what does it mean in practice…– Promoting self-help therapies?– Motivational enhancement?– ‘Strengths-focused’ therapies?
• Challenge is to develop ways of drawing on the client’s self-healing potential
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Can some therapeutic methods facilitate this change process more than others?
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‘Allegiance effects’ makes it very difficult to accurately interpret RCT
findings1. File drawer problem2. Biased analysis of data 3. Control ‘therapies’ may be nothing
like real intervention4. Measures are tailored to approach
Independent/balanced research essential to help establish effectiveness -- and comparative effectiveness -- of therapies
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• Relative effectiveness may vary for different problems: e.g., –Depression: Equivalence across
therapies–Anxiety: CBT may be
most effective
Differential dodo effect
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‘Modular’ therapies
• May see shift to evaluation of therapy ‘components’, rather than whole-scale ‘packages’
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‘Value’• Even if
therapies are of equal effectiveness (in the long run), key question may be which one is most efficient/cost-effective
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The promise of aptitude-treatment interactions
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Aptitude-treatment interactions
• Means of developing and delivering more individualised, tailored therapies
• More consistent with counselling psychology values
• But promise is yet to be realised:– Few moderating characteristics identified– Effects tend to be weak– Not easy to operationalize
• Key area for further research…
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Identifying client preferences
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Evidencing at the idiographic level
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Collecting client feedback:
A revolution in therapeutic
practice and research?
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Partners for Change Outcome Management System (ORS, CORS) (reviewed in Jan 2012) now an approved treatment
by the Substance Abuse and Mental Health Services Administration
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From evidence-based practice to evidence-
tailored practice• From asking:
‘Is there evidence that this therapy helps clients with this kind of problem?’
• And even: ‘Is there evidence that this therapy helps this kind of client with this kind of problem?’ (ATIs)• To asking: ‘Is there evidence that this therapy is helping
this individual client?’
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Nomothetic view: What works on average?
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Idiographic view: What is working for this person?
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How much would
You enjoy a film?
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The limits of systematic feedback• Systematic feedback guides
therapists on how to tailor practice• But provides little information on
where to start from
Both nomothetic and idiographic evidence have role to play in developing and delivering effective
therapies
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Combining levels of evidence
Evidence-based therapyEvidence-based relating
Tailoring by ATI
Outcome feedback
Process feedback
Idiographic
Nomothetic
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The potential
of process feedback
: enhancin
g responsiv
eness
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The complexity of change
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Positive therapeutic change likely to be the product of a multiplicity of interactingfactors:Nomothetic - idiographic - client - therapist - context - relationship - orientation
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Researching change
• Need methods that can beyond additive models to represent complex heterogeneity of potential change pathways
• In-depth qualitative research may be of particular value here
'Lambert's pie'Estimate of Percentage of Improvement in Psychotherapy
Clients as a Function of Therapeutic FactorsTechnique and model factors
15%Client variables and
extratherapeutic events40%
Expectancy and placebo effects
15%
The therapeutic relationship
30%
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Helpful processes in psychological therapies with people who have cancer
Joanna Omylinska-Thurston
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‘Pluralistic’ perspective
• ‘Therapy is not one thing’
• Clients can be helped by multiple change processes in multiple ways
• Avoiding black and white thinking in therapeutic research or practice
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Practice A
Practice B
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Common factors
Orientation-specific effects
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Psychological
Pharmacological
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Research-informedPractice/theory-
informed
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Pluralistic stance strives to hold evidence and theory ‘lightly’, never losing sight of the complexity of the unique individual
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‘Take home’ points1. 50+ years of psychotherapy research have built up a rich,
complex and heterogeneous body of evidence on therapeutic change
2. The key driver of positive outcomes seems to be a client who is willing and able to change – and who feels that they can work collaboratively with their therapist towards this
3. Some kinds of therapeutic input, for some kinds of clients, may be particularly facilitative of this process – but we need to know more
4. Revolutionary developments in systematic feedback are allowing us to move from understanding what generally works for clients, towards a more specific understanding of what is working for this individual person
5. But we need better methods for predicting and supporting complex, heterogeneous processes of change – and counselling psychologists are ideally placed to play a leading role in this