47
Evidence Based Treatment: Why Cognitive Behavioral Therapy The 6 th Annual CIBHS Evidence-Based Practices Symposium April 21, 2016 Leslie Sokol, Ph.D. & Troy Thompson Academy of Cognitive Therapy

Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

Embed Size (px)

Citation preview

Page 1: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

Evidence Based Treatment: Why Cognitive Behavioral Therapy

The 6th Annual CIBHS Evidence-Based

Practices Symposium April 21, 2016

Leslie Sokol, Ph.D. & Troy Thompson

Academy of Cognitive Therapy

Page 2: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

Evidence Based Treatment

CBT CT DBT ACT Motivational Interviewing PE/CPT EMDR

Page 3: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

CBT Outcome Studies

Cognitive Behavioral Therapy (CBT) has been demonstrated in hundreds of studies to be an effective treatment for a variety of disorders and problems for adults, older adults, children and adolescents.

Page 4: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

ADULTS Randomized Controlled Trials

Depression Geriatric Depression Relapse Prevention in Depression Generalized Anxiety Disorder Panic Disorder Agoraphobia and Panic Disorder with Agoraphobia Social Anxiety/Social Phobia

Page 5: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

Obsessive-Compulsive Disorder Post-Traumatic Stress Disorder (Trauma) Withdrawal from Anti-Anxiety Medication Dental Phobia Bipolar Disorder (in combination with medication) Binge-eating Disorder Bulimia Anorexia Body Dysmorphic Disorder

Page 6: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

Somatization Disorder Cocaine Abuse Opiate Dependence Smoking Cessation Marital Discord Anger Schizophrenia Borderline Personality Disorder Atypical Sexual Practices/Sex Offenders

Page 7: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

MEDICALLY RELATED DISORDERS

Chronic Pain Chronic Back Pain Fatigue and Functional Impairments among Cancer Survivors Sickle Cell Disease Pain Physical Complaints Not Explained by a Medical Condition (Somatoform Disorders) Irritable-Bowel Syndrome

Page 8: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

Obesity (CBT is effective in combination with hypnosis) Asthma with Coexisting Panic Disorder (in combination with asthma education) Rheumatic Disease Pain Erectile Dysfunction (CBT is effective for reducing sexual anxiety and improving communication) Infertility

Page 9: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

Sleep Disorders Geriatric Sleep Disorders Insomnia Vulvodynia (a chronic pain condition of the vulva) Chronic Fatigue Syndrome Migraine Headaches Non-Cardiac Chest Pain

Page 10: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

CBT Research for Children and Adolescents

Depression Anxiety disorders (separation anxiety, avoidant disorder, overanxious disorder, obsessive compulsive disorder, phobias, post-traumatic stress disorder) Conduct disorder (oppositional defiant disorder) Distress due to medical procedures (mainly for cancer) Recurrent abdominal pain Physical Complaints (Somatoform Dis)

Page 11: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

CBT Research (non-randomized controlled trials)

Hypochondriasis Caregiver Distress Suicide attempts Attention deficit disorder Dissociative Disorders Schizophrenia (in combination with medication)

Page 12: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

CBT Research for Medical Problems (non-randomized controlled trials)

Cancer pain Idiopathic pain Gulf War Syndrome Tinnitus Idiopathic Pain Hypochondriasis Hypertension Fibromyalgia

Page 13: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

CBT is also used for: Stress Low Self-Esteem Relationship Difficulties Group Therapy Family Therapy Psychiatric Inpatients Work Problems and Procrastination Pre-Menstrual Syndrome Grief and Loss Aging

Page 14: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient
Page 15: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

The Cognitive Model

Situation Automatic Thoughts Emotion One’s perception of a situation leads to automatic thoughts which then influence emotion

Situation Automatic Thoughts

Emotion

Behavior

Physiological

Response

Automatic thoughts influence not only one’s emotional response, but also one’s behavioral and physiological responses

Situation Automatic Thoughts Emotion

Beliefs

One’s perception and thoughts are influences by underlying beliefs.

Page 16: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient
Page 17: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient
Page 18: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

Categories of Core Beliefs Helpless Unlovable Inadequate Unattractive Powerless Undesirable Trapped Rejected Inferior Alone Ineffective Unwanted Incompetent Uncared for Weak Bad Vulnerable Worthless Failure Different Defective Not Good Enough (Doesn’t Measure Up) (To Be Loved By Others) Not Good Enough Defective (Doesn’t Measure Up) (So Can’t Be Loved) Loser Nerd (Achievement-Wise) Needy Loser (in relationships) Out of Control ©1995 JSBeck, Cognitive Therapy: Basic and Beyond, Guilford.

Page 19: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

The linked image cannot be displayed. The file may have been moved, renamed, or deleted. Verify that the link points to the correct file and location.

Cognitive Conceptualization Diagram RELEVANT CHILDHOOD DATA

CORE BELIEFS

CONDITIONAL ASSUMPTIONS/ BELIEFS/ RULES

COPING STRATEGIES

SITUATION #1

AUTOMATIC THOUGHT

MEANING OF AT

Emotion

Behavior

SITUATION #2

AUTOMATIC THOUGHT

MEANING OF AT

Emotion

Behavior

Emotion

Behavior

AUTOMATIC THOUGHT

SITUATION #3

MEANING OF AT

© 2011, Beck, J.S. Cognitive Behavior Therapy: Basics and Beyond (2nd ed.). www.beckinstitute.org.

Page 20: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

CBT- is based on an ever-evolving formulation of the patient and their problems in cognitive terms.

CBT- a good client-therapist relationship is essential

CBT- emphasizes collaboration and active participation of both the pt and the therapist

CBT- is goal-oriented and problem focused CBT- initially present focused/past aware CBT-educational- it aims to teach the client to be

his/her own therapist, and emphasizes relapse prevention.

CBT Basic Principles

Page 21: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

CBT- aims to be time limited CBT- sessions are structured • CBT- teaches patients to identify, evaluate, and

respond to their dysfunctional thoughts and beliefs – Modifying dysfunctional thinking provides

improvement in symptoms. – Modifying dysfunctional beliefs which

underlie dysfunctional thinking leads to more durable improvement

CBT- uses a variety of techniques to change thinking, mood, and behavior

Basic Principles (cont.)

Page 22: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

Structure of the Therapeutic Interview

1. Mood check

2. Setting agenda

3. Bridge from last session

4. Discussion of today’s agenda items

Page 23: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

5. Capsule summaries plus summarization of session

6.Homework assignment

7. Feedback from patient

Page 24: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

Cognitive Therapy of Depression

Page 25: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

COGNITIVE TRIAD

Negative Self View

Paralysis of Will Depressed Mood

Suicidal Wishes

Increased Dependency

Avoidance Wishes

Negative View of World

Negative View of Future

Page 26: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

Key Features of Treatment

Identifying, Examining, and Modifying ineffective behaviors – (Behavioral Activation)

Identifying, Examining, and Modifying negatively biased thoughts and beliefs – (Thought Records) “I am useless”

Page 27: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

CBT Bipolar Disorder

Page 28: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

TRIAD IN MANIA

OVERMOBILIZED

OVERACTIVE

EUPHORIC

INCREASED INDEPENDENCE

RECKLESS RISK-TAKING

INFLATED VIEW OF SELF

INFLATED VIEW OF FUTURE

INFLATED VIEW OF EXPERIENCE

Page 29: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

Key Features of Treatment

Identifying, Examining, and Modifying ineffective behaviors – Behavioral Reduction – Resist temptation – Run a “pilot study” before you act.

Identifying, Examining, and Modifying positively biased thoughts and beliefs – (Thought Records) “I am invincible”

Page 30: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

COGNITIVE MODEL OF ANXIETY

STIMULUS (External or

Internal Event)

PRIMARY APPRAISAL: “Danger”

REAPPRAISALS of Danger, Risk, Resources

BEHAVIORAL INCLINATION (Flight, Freeze, Defend)

AFFECT Anxiety Terror

PHYSIOLOGICAL Palpitation Sweating Tension

SECONDARY APPRAISAL: Risk: Resources Ratio

© 2003 Judith S. Beck,. Ph.D.

Page 31: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

Risk/Resources Ratio

Tendency to overestimate risk

Tendency to underestimate one’s resources (past, current, & future).

False Alarm

Tendency to overestimate the

likelihood of a problem arising and

exaggerate the consequences

Tendency to discount one’s ability to cope

False Alarm

Tendency to perceive a situation as

dangerous when it is in fact not dangerous

Tendency to underestimate outside rescue factors (I.e., friends, colleagues).

False Alarm

VS. Real Danger

VS. Genuine lack of resources

Alarm Adaptive Anxiety

RISK OF DANGER

RESOURCES OR ABILITY TO COPE

ANXIETY

Page 32: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

Key Features of Treament

Identify, Evaluate and Modify Misperceptions of Threat: – Overestimations of Probability – Overestimations of Consequences

Identify, Evaluate, Modify, and Build if necessary Resource: – Underestimates of Internal and External

Resources

Page 33: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

THE COGNITIVE PROFILE OF ANXIETY DISORDERS

DSM IV DISORDER SPECIFIC COGNITIVE CONTENT

DYSFUNCTIONAL COPING STRATEGY

GENERALIZED ANXIETY DISORDER

EXCESSIVE FEARS OF PSYCHOLOGICAL OR PHYSICAL DANGER ACROSS SITUATIONS

HYPERVIGILANCE; CHRONIC WORRY

PANIC DISORDER CATASTROPHIC MISINTERPRETATION OF BODILY/MENTAL EXPERINCES REQUIRING IMMEDIATE INTERVENTION

HYPERVIGILANCE FOR SYMPTOMS; OVERT OR SUBTLE AVOIDANCE; HELP-SEEKING

HYPOCHONDRIASIS FEARS THAT A MEDICAL PROBLEM OR CATASTROPHE WILL HAPPEN AT SOME POINT

HYPERVIGILANT FOR PHYSICAL SYMPTOMS

© 2003, Judith S. Beck, Ph.D.

Page 34: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

SPECIFIC PHOBIA ANTICIPATED HARMIN SPECIFIC

SITUATIONS ORUPON EXPOSURE TO

SPECIFIC OBJECT

AVOIDANCE

SOCIAL PHOBIA FEAR OFHUMILIATION ININTERPERSONAL

SITUATIONS

AVOIDANCE:HYPERATTENTION TOINTERNAL PROCESSES

OBSESSIVECOMPULSIVE

DISORDER

REPETITIVE,EXCESSIVE WORRIESABOUT POTENTIAL

DANGERS ANDRESPONSIBILITY FORPREVENTING HARM

THOGHT SUPRESSINGAND/OR COMPULSIVE

BEHAVIORS TOREDUCE DISTRESS

POST-TRAUMATICSTRESS/DISORDER

AND ACTUE STRESSDISORDER

FEAR OF RE-EXPERIENCINGHORROR OF A

TRAUMA

AVOIDANCE

Page 35: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

The linked image cannot be displayed. The file may have been moved, renamed, or deleted. Verify that the link points to the correct file and location.

Steps

Identify the Core Belief Understanding: Link early childhood data to

development of the Core Belief Motivation to work on change: adv/disadv Consider alternative Hypothesis: Not 100% true Examine the data:

Present Past

Fuel the New Belief

Page 36: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

COGNITIVE THERAPY FOR SUBSTANCE ABUSE

Page 37: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

High Risk Stimuli

(Internal or External)

Basic Drug-Related Beliefs

Activated

Automatic Thoughts

High Risk Craving/Urges

Facilitating Beliefs (Permission)

Focus on Instrumental Strategies (Action)

Continued Use or

Relapse

Cognitive Model of Substance Abuse

Page 38: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

Cognitive Therapy for Personality Disorders

Page 39: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

AXIS II BELIEFS AND STRATEGIES Adapted from A. Beck, A. Freeman, et al. Cognitive Therapy of Personality Disorders, Guilford, 1990.

PersonalityDisorder

Core Beliefabout the Self

Belief aboutOthers

Assumptions BehavioralStrategy

Avoidant I’mundesirable.

Other peoplewill evaluatemenegatively.

If people knowthe real me,they’ll rejectme.

If I put on afaçade, theymay acceptme.

Avoid intimacy

Dependent I’m helpless. Other peopleshould takecare of me.

If I rely onmyself, I’ll fail.

If I depend onothers, I’llsurvive.

Rely on otherpeople

Page 40: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

ObsessiveCompulsive

My world cango out ofcontrol.

Other peoplecan beirresponsible.

If I’m not totallyresponsible,my world willfall apart.

If I impose rigidrules andstructure,things will turnout okay.

Control othersrigidly.

Paranoid I’m vulnerable. Other peopleare malicious.

If I trust otherpeople, theywill harm me,

If I am on myguard, I canprotect myself.

Be overlysuspicious

Antisocial I’m vulnerable Other peopleare potentiallyexploitative.

If I don’t actfirst, I can behurt.

If I can exploitfirst, I can beon top.

Exploit others

Page 41: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

Narcissistic I’m inferior.

(The manifestcompensatorybelief is I’msuperior.)

Other peopleare superior.

(The manifestcompensatorybelief is othersare inferior.)

If othersregard me in anon-specialway, it meansthey considerme inferior.

If I achieve myentitlements, itshows I amspecial.

Demandspecialtreatment

Histrionic I’m nothing. Other peoplewill not valueme for myselfalone.

If I am notentertaining,others won’tbe attracted tome.

If I amdramatic, I’llget others’attention andapproval.

Entertain

Page 42: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

Schizoid I’m a socialmisfit.

Other peoplehave nothing tooffer me.

If I keep mydistance fromothers, I’llmake outbetter.If I try to haverelationships,they won’t workout.

Distance selffrom others

Schizotypal I am defective. Other peoplearethreatening.

If I sense thatothers arefeelingnegativelytoward me, itmust be true.If I’m wary ofothers, I candivine their trueintentions.

Assume hiddenmotives

BorderlinePersonalityDisorder

I’m defective.I’m helpless.I’m vulnerable.I’m bad.

Other peoplewill abandonme.

People can’t betrusted.

If I depend onmyself, I won’tsurvive.If I trust others,they’ll abandonme.If I depend onothers, I’llsurvive butultimately beabandoned.

Vacillate inextremes ofbehavior

Page 43: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

Cognitive Therapy for Schizophrenia

Page 44: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

Cognitive Therapy Approach

For all presenting problems- – Thinking influences emotion and behavior

Interpretation of experience key – Beliefs are possibilities, hypotheses, not facts

Approach can be applied to beliefs associated with hallucinations and delusions

Page 45: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

Cognitive Therapy Organizations

Academy of Cognitive Therapy (ACT) -Certifies Cognitive Therapists -Referrals -Listserve -Newsletter www.academyofct.org Email: [email protected]

Association of Behavioral Cognitive Therapies (ABCT) -National Membership Organization -Annual Conference www.abct.org Email: [email protected]

International Association for Cognitive Psychotherapy -International Membership Association -Triannual World

Congress -Journal http://iacp.asu.edu/

Page 46: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

References

Beck, A.T., &Alford, B.A. (2008) Depression: Causes and

treatment, 2nd edition. Philadelphia: University of Pennsylvania Press.

Beck, J.S. (2011)2nd edition. Cognitive therapy: Basics and beyond. New York: Guilford.

Beck, J.S. (2005) Cognitive therapy for challenging problems. New York, Guilford.

Beck, A.T., Freeman, A., Davis, D. and Assoc. (2004). Cognitive therapy of personality disorders, 2nd ed. New York: Guilford

Clark, D.A., and Beck, A.T. (2012). The anxiety and worry workbook: The cognitive behavioral solution. New York: Guilford.

Page 47: Evidence Based Treatment: Why Cognitive Behavioral Therapy · Evidence Based Treatment: Why Cognitive Behavioral Therapy . ... Cognitive Conceptualization Diagram . ... the patient

References Continued Clark, D.A., and Beck, A.T. (2011). Cognitive therapy of

anxiety disorders: Science and practice. New York: Guilford.

Fox, M.G. & Sokol, L. (2011) Think Confident, Be Confident for Teens: A cognitive therapy program to eliminate doubt and create unshakeable self-confidence. Oakland, CA: New Harbinger.

Hofmann, S.G. (2011) An introduction to modern CBT: Psychological solutions to mental health problems. Oxford: John Wiley &Sons.

Sokol, L. & Fox, M.G. (2009) Think Confident, Be Confident: A four step program to eliminate doubt and achieve lifelong self-esteem. New York: Perigee.