Chapter 16: Treatment and Therapy¶

Summary¶

This final chapter surveys the full landscape of psychological and biological treatment. Students examine cognitive-behavioral therapy in depth, revisit psychodynamic, humanistic, and behavioral therapies, and explore biological treatments — antidepressants, antianxiety medications, antipsychotics, ECT, TMS, and biofeedback. The chapter covers major remaining disorders through a treatment lens: PTSD, major depressive disorder, persistent depressive disorder, bipolar I and II disorders, mania, panic disorder, dissociative disorders, and eating disorders (anorexia and bulimia nervosa). Culture-bound anxiety disorders illustrate cultural variation in psychological distress. The chapter closes with stigma in mental health and posttraumatic growth.

Concepts Covered¶

This chapter covers the following 23 concepts from the learning graph:

Stigma in Mental Health
Cognitive-Behavioral Therapy
PTSD
Biofeedback
Dissociative Amnesia
Dissociative Identity Disorder
Psychotropic Medications
Dopamine Hypothesis
Major Depressive Disorder
Antianxiety Medications
Antipsychotic Medications
Transcranial Magnetic Stimulation
Persistent Depressive Disorder
Bipolar I Disorder
Antidepressants
Electroconvulsive Therapy
Bipolar II Disorder
Mania
Panic Disorder
Anorexia Nervosa
Bulimia Nervosa
Culture-Bound Anxiety Disorders
Posttraumatic Growth

Prerequisites¶

This chapter builds on concepts from:

16.1 The Therapy Landscape: CBT in Focus¶

Mascot-welcome

Psy the Owl welcoming you to Chapter 16 Welcome to Chapter 16 — the final chapter, and the one about how things get better!

Every disorder we've covered in the last two chapters has an associated treatment — often multiple treatments. This chapter maps the full treatment landscape: psychological therapies, biological treatments, and everything in between. You'll see the logical elegance of how the theoretical perspective on a disorder generates its treatment: if depression is caused by distorted cognitions, fix the cognitions. If OCD is maintained by avoidance, prevent avoidance. If schizophrenia involves excess dopamine, block dopamine receptors.

This chapter also includes important disorders we haven't covered yet — PTSD, bipolar disorder, dissociative disorders, eating disorders, and panic disorder — each examined through the treatment lens. And we'll close with two of the most hopeful ideas in clinical psychology: stigma reduction and posttraumatic growth.

Let's think about that! 🦉

Cognitive-Behavioral Therapy¶

Cognitive-behavioral therapy (CBT) integrates cognitive therapy (identifying and restructuring distorted thought patterns) and behavioral therapy (applying learning principles to modify behavior). CBT is the most empirically supported psychological treatment and has demonstrated efficacy for depression, anxiety disorders, OCD, PTSD, eating disorders, substance use, and more.

Core CBT principles: - Thoughts, emotions, and behaviors are interconnected; changing one changes the others. - Maladaptive cognitions and behaviors can be identified, challenged, and modified through structured techniques. - The client is an active participant — CBT is skills-based, not insight-oriented. - Treatment is structured, time-limited, and focused on present problems.

CBT techniques include: cognitive restructuring (challenging cognitive distortions), behavioral activation (scheduling rewarding activities for depression), exposure (for anxiety), thought records (monitoring and evaluating automatic thoughts), and problem-solving training.

16.2 Mood Disorders¶

Major Depressive Disorder¶

Major Depressive Disorder (MDD) is characterized by one or more major depressive episodes — periods of at least two weeks of depressed mood or loss of interest/pleasure (anhedonia), plus at least four of the following: weight/appetite change, sleep disturbance, psychomotor agitation or retardation, fatigue, feelings of worthlessness or excessive guilt, difficulty concentrating, and recurrent thoughts of death or suicidal ideation.

MDD affects approximately 7% of adults in the United States in a given year and is more common in women than men. It is the leading cause of disability worldwide.

Biological bases: MDD involves dysregulation of monoamine neurotransmitters — particularly serotonin, norepinephrine, and dopamine — as well as HPA axis hyperactivation, reduced hippocampal volume (from chronic cortisol exposure), and altered prefrontal cortex function. The monoamine hypothesis of depression (low monoamine activity → depression) is incomplete — antidepressants elevate monoamines within hours but therapeutic effects take weeks — but remains the dominant pharmacological framework.

Treatment: CBT and antidepressant medications are equally effective for mild-to-moderate MDD. For severe depression, their combination is superior to either alone. Exercise has small but real antidepressant effects. For treatment-resistant depression, ECT and TMS are options.

Persistent Depressive Disorder¶

Persistent depressive disorder (dysthymia) is characterized by a chronically depressed mood lasting at least two years, with fewer and less severe symptoms than MDD (two symptoms from the MDD list, rather than five). Persistent depressive disorder represents a low-grade, chronic depression that may be less dramatic than MDD but is quite disabling precisely because of its chronicity — living with continuously low mood, low energy, and hopelessness for years or decades.

Mania and Bipolar Disorders¶

Mania is a distinct period of abnormally elevated, expansive, or irritable mood and increased energy/activity, lasting at least one week (or less if hospitalization is required), accompanied by at least three of: grandiosity, decreased need for sleep, pressured speech, racing thoughts, distractibility, increased goal-directed activity, and impulsive risk-taking (spending sprees, reckless sexual behavior, foolish business investments). Mania produces severe impairment and may involve psychotic features.

Bipolar I Disorder is defined by the presence of at least one full manic episode (depression is common but not required for diagnosis). During a manic episode, individuals may go days without sleep, make grandiose plans, spend recklessly, and lose contact with reality. Hospitalization is frequently required during acute mania.

Bipolar II Disorder involves at least one hypomanic episode (a less severe, less impairing form of mania lasting at least four days) and at least one major depressive episode. Hypomanic episodes don't require hospitalization, and the person maintains insight that something is different. Bipolar II is often misdiagnosed as MDD because patients present during depressive phases.

Diagram: Bipolar I vs. Bipolar II Mood Episodes¶

Explore: How do the mood episodes differ between Bipolar I and Bipolar II?

Bipolar I: - Full mania (≥1 week, severe impairment, may require hospitalization) - Often includes major depressive episodes (not required for diagnosis) - Psychotic features possible during mania - Higher overall severity of illness

Bipolar II: - Hypomania (≥4 days, noticeable mood change, not severely impairing, no psychosis) - Major depressive episodes required for diagnosis - Often misdiagnosed as MDD — the hypomania may feel good and not be reported - Suicide risk is high (depressive episodes are severe; hypomania can lower inhibitions)

Why the distinction matters clinically: Prescribing antidepressants alone to someone with bipolar disorder can trigger a manic or hypomanic episode (antidepressant "switching"). Bipolar disorders require mood stabilizers (lithium, valproate, lamotrigine) — not just antidepressants. Misdiagnosis as MDD therefore carries real treatment risk.

Treatment: Bipolar disorders are primarily treated with mood stabilizers (lithium is the classic; valproate and lamotrigine are alternatives). Lithium reduces both manic and depressive phases and is the gold standard for long-term mood stabilization. Antipsychotics are often used during acute mania. CBT and psychoeducation as adjuncts to medication improve outcomes.

PTSD¶

Post-Traumatic Stress Disorder (PTSD) develops in some individuals following exposure to actual or threatened death, serious injury, or sexual violence. Diagnostic criteria require symptoms in four clusters:

Re-experiencing: Intrusive memories, flashbacks, trauma-related nightmares
Avoidance: Avoiding trauma-related thoughts, feelings, or external reminders
Negative alterations in cognition/mood: Persistent negative beliefs, distorted blame, negative emotional states, reduced positive emotion, feeling detached or estranged
Hyperarousal/reactivity: Hypervigilance, exaggerated startle response, sleep disturbance, irritability, reckless behavior

PTSD develops in approximately 20% of people exposed to traumatic events. Risk factors include trauma severity and chronicity, prior trauma history, social support deprivation, and genetic vulnerability.

Treatment: Trauma-focused CBT, Prolonged Exposure (PE), and EMDR (Eye Movement Desensitization and Reprocessing) have the strongest evidence. SSRIs (sertraline, paroxetine) are FDA-approved. Avoidance — the natural response to trauma reminders — maintains PTSD by preventing extinction of conditioned fear.

Dissociative Disorders¶

Dissociation is a disruption of integrated consciousness, memory, identity, emotion, perception, behavior, or sense of self. Dissociative disorders are thought to arise as defensive responses to overwhelming trauma.

Dissociative amnesia is the inability to recall important autobiographical information, usually of a traumatic or stressful nature, that is too extensive to be explained by ordinary forgetfulness. A dramatic variant is dissociative fugue — sudden, unexpected travel away from home with memory loss and confusion about identity.

Dissociative identity disorder (DID) (formerly multiple personality disorder) involves the presence of two or more distinct identity states or personality states that recurrently take control of the person's behavior, accompanied by gaps in recall for everyday events, personal information, or traumatic events too extensive to be explained by ordinary forgetfulness. DID is associated with severe, chronic childhood trauma (particularly abuse). It remains controversial — some researchers question the validity of the diagnosis, while others argue it is an underdiagnosed consequence of extreme trauma.

16.4 Anxiety Disorders: Panic Disorder and Culture-Bound Syndromes¶

Panic Disorder¶

Panic disorder is characterized by recurrent unexpected panic attacks — sudden surges of intense fear or discomfort that reach a peak within minutes, with physical symptoms such as racing heart, shortness of breath, chest tightness, dizziness, numbness, and fear of dying or "going crazy" — plus persistent concern about future attacks or significant behavioral change to avoid attacks (agoraphobia often develops).

The vicious cycle of panic disorder: A panic attack occurs → the person becomes hypervigilant to physical sensations → bodily sensations (rapid heartbeat, shortness of breath) are catastrophically misinterpreted as signs of heart attack or death → catastrophic interpretation increases anxiety → anxiety increases physical sensations → full panic attack.

CBT that targets the catastrophic misinterpretation of bodily sensations (interoceptive exposure + cognitive restructuring) is highly effective.

Culture-Bound Anxiety Disorders¶

Culture-bound anxiety disorders are patterns of distress specific to particular cultural contexts that resemble anxiety disorders but may not fit DSM categories precisely. Examples include:

Ataque de nervios (Latin American): Intense emotional upset including shouting, crying, trembling, and transient loss of consciousness, often triggered by stressful events, especially in family contexts.
Taijin kyofusho (Japanese): Fear that one's body, appearance, or odor is offensive or embarrassing to others — similar to social anxiety but other-directed rather than self-directed.
Koro (Southeast Asian): Intense fear that the penis (or nipples in women) is shrinking and retracting into the body, which will cause death.

These syndromes illustrate that anxiety and its expression are shaped by cultural context. They are now acknowledged in the DSM-5 as cultural concepts of distress.

16.5 Eating Disorders¶

Anorexia Nervosa¶

Anorexia nervosa is characterized by:

Persistent restriction of energy intake leading to significantly low body weight
Intense fear of gaining weight or persistent behavior interfering with weight gain (even when underweight)
Disturbed perception of body weight or shape, undue influence of body weight/shape on self-evaluation, or denial of the seriousness of current low weight

Two subtypes: restricting type (dieting, fasting, excessive exercise) and binge-eating/purging type.

Anorexia has the highest mortality rate of any psychiatric disorder — death occurs from medical complications (cardiac arrhythmia, electrolyte imbalance, organ failure) and suicide. Treatment requires medical stabilization, nutritional rehabilitation, and psychological treatment (CBT, family-based therapy for adolescents, which has the strongest evidence for adolescent anorexia).

Bulimia Nervosa¶

Bulimia nervosa is characterized by:

Recurrent episodes of binge eating (consuming large amounts of food in a discrete period with sense of loss of control)
Recurrent inappropriate compensatory behavior to prevent weight gain: self-induced vomiting, laxative/diuretic misuse, fasting, or excessive exercise
Binge-purge cycle occurs at least once weekly for three months
Self-evaluation unduly influenced by body shape and weight
Not occurring exclusively during episodes of anorexia nervosa

Medical consequences of bulimia include: erosion of dental enamel (from repeated vomiting), esophageal damage, electrolyte imbalances (cardiac risk), and sialadenosis (swollen salivary glands). CBT is the gold-standard psychological treatment; antidepressants (particularly fluoxetine/SSRIs) reduce binge-purge frequency.

16.6 Biological Treatments¶

Psychotropic Medications¶

Psychotropic medications are drugs that alter brain chemistry to affect mood, perception, cognition, or behavior. Four major classes:

Antidepressants: First-line treatments for major depression, anxiety disorders, OCD, PTSD, and eating disorders.

SSRIs (Selective Serotonin Reuptake Inhibitors): Fluoxetine (Prozac), sertraline (Zoloft), escitalopram — block serotonin reuptake, increasing synaptic serotonin. Side effects: sexual dysfunction, insomnia, nausea. Safest in overdose.
SNRIs (Serotonin-Norepinephrine Reuptake Inhibitors): Venlafaxine, duloxetine — block reuptake of both serotonin and norepinephrine.
TCAs (Tricyclic Antidepressants): Older class; effective but higher side effects and dangerous in overdose.
MAOIs (Monoamine Oxidase Inhibitors): Oldest class; effective but require dietary restrictions (tyramine-free diet) due to hypertensive crisis risk.

Antianxiety Medications (Anxiolytics): - Benzodiazepines (diazepam/Valium, alprazolam/Xanax): Enhance GABA activity; produce rapid anxiolytic, sedative, muscle relaxant effects. Risk of dependence with regular use. - Buspirone: Serotonin partial agonist; anxiolytic without sedation or dependence potential. Takes weeks to work. - Beta-blockers (propranolol): Block peripheral autonomic arousal; used for performance anxiety.

Antipsychotic Medications: - First-generation (typical) antipsychotics (haloperidol/Haldol, chlorpromazine): Block D2 dopamine receptors; reduce positive symptoms. Risk of tardive dyskinesia (involuntary repetitive movements) with long-term use. - Second-generation (atypical) antipsychotics (clozapine, risperidone, quetiapine): Block dopamine AND serotonin receptors; reduced tardive dyskinesia risk; some efficacy for negative symptoms; metabolic side effects.

Mood Stabilizers: - Lithium: Reduces frequency/severity of both manic and depressive episodes in bipolar disorder. Narrow therapeutic window — requires blood level monitoring. Mechanism not fully understood. - Anticonvulsants (valproate, lamotrigine): Used as mood stabilizers in bipolar disorder.

The Dopamine Hypothesis¶

The dopamine hypothesis of schizophrenia proposes that positive symptoms arise from excess dopaminergic activity in the mesolimbic pathway. Evidence: antipsychotic drugs that block D2 dopamine receptors reduce positive symptoms; dopamine-enhancing drugs (amphetamines, L-DOPA) can produce schizophrenia-like psychosis in normal individuals.

Limitations: the hypothesis explains positive symptoms but not negative symptoms (which may involve prefrontal dopamine deficiency); antipsychotics don't help all patients; newer evidence implicates glutamate (NMDA receptor) dysregulation. The dopamine hypothesis is best understood as a partial model.

Electroconvulsive Therapy¶

Electroconvulsive therapy (ECT) involves passing a brief electrical current through the brain under general anesthesia to induce a controlled seizure. It is used for severe, treatment-resistant depression, acute mania, and catatonia. ECT has a high efficacy rate (~60–80% response in treatment-resistant depression) — often faster than medications — but requires multiple sessions and produces temporary memory impairment.

ECT's historical reputation (from pre-anesthesia, high-voltage applications depicted in films like One Flew Over the Cuckoo's Nest) vastly overstates its risks and understates its efficacy. Modern ECT is administered humanely under anesthesia and remains one of the most effective treatments for severe depression.

Transcranial Magnetic Stimulation¶

Transcranial Magnetic Stimulation (TMS) uses magnetic fields to stimulate specific cortical regions non-invasively. Repetitive TMS (rTMS) to the left dorsolateral prefrontal cortex (typically underactive in depression) is FDA-approved for treatment-resistant depression. It requires daily sessions (typically 4–6 weeks), produces no memory impairment, and involves minimal side effects (headache, scalp discomfort). TMS is less effective than ECT for severe depression but can be used in outpatient settings without anesthesia.

Biofeedback¶

Biofeedback is a technique in which electronic monitoring provides real-time feedback about physiological processes (heart rate, skin conductance, muscle tension, brain waves) so that individuals can learn to voluntarily regulate them. Through operant learning, clients can reduce muscle tension, control heart rate variability, or shift brainwave patterns.

Applications include: chronic pain, headache, anxiety, hypertension, ADHD (neurofeedback), and Raynaud's syndrome. Biofeedback is a behavioral intervention — no medication required — that trains physiological self-regulation skills that persist after treatment ends.

16.7 Stigma and Posttraumatic Growth¶

Stigma in Mental Health¶

Stigma in mental health is the social disapproval and discrimination directed at people with mental disorders. Stigma occurs at multiple levels:

Public stigma: Negative stereotypes, prejudice, and discrimination by society at large (beliefs that people with mental illness are dangerous, incompetent, or personally responsible for their condition).
Self-stigma: Internalization of negative stereotypes — shame, reduced self-esteem, and reluctance to seek help.
Structural stigma: Institutional policies and laws that disadvantage people with mental illness (inadequate insurance coverage, employment discrimination, criminal justice inequities).

Consequences of stigma include: delayed help-seeking (people avoid diagnosis and treatment to avoid the label), reduced treatment adherence, social isolation, and compounded impairment. Anti-stigma campaigns emphasizing personal contact with people who have mental disorders (contact-based education) have the strongest evidence for reducing public stigma.

Mascot-encourage

Psy the Owl encouraging Psy's Encouragement: Understanding stigma is not just an academic exercise. You are part of the generation that will determine whether future people with mental health conditions are met with compassion or contempt. The evidence shows that knowing someone personally with a mental disorder — or disclosing one's own experience — is the single most effective anti-stigma intervention.

Posttraumatic Growth¶

Posttraumatic growth (PTG) is positive psychological change that can emerge from the struggle with highly challenging life circumstances. Coined by Richard Tedeschi and Lawrence Calhoun, PTG involves changes in five domains:

Personal strength: Feeling more capable and resilient than before the trauma.
New possibilities: Discovering new paths, purposes, or interests that emerged from the struggle.
Relating to others: Deepened relationships, greater empathy and compassion.
Appreciation for life: Greater appreciation for each day, shifted priorities toward what truly matters.
Spiritual/existential change: Deepened spiritual life or reconsidered understanding of meaning.

PTG is not the same as resilience (bouncing back to baseline) — it involves actual growth beyond the pre-trauma level in some domains. Critically, PTG coexists with ongoing distress: a person can simultaneously experience PTSD symptoms and posttraumatic growth. The struggle — not the trauma itself — is what produces growth; PTG is not a consequence of trauma per se but of the effortful cognitive and emotional processing of trauma.

PTG is reported by many survivors of cancer, bereavement, combat, serious illness, and natural disasters. It offers an empirically grounded counter-narrative to the view that trauma has only negative consequences.

16.8 Chapter Review and Course Conclusion¶

Mascot-celebration

Psy the Owl celebrating Congratulations — you've completed all 16 chapters of this psychology textbook!

You began in Chapter 1 with the scientific method and the question of what psychology even is. You traveled through the neuroscience of the brain, the biochemistry of neurotransmitters, the mysteries of perception and memory, the logic of classical and operant conditioning, the surprising power of social situations, the architecture of personality and emotion, the biology of stress, the classification of psychological disorders, and the landscape of treatment.

Every one of these topics connects to the others. The brain (Chapter 2) is changed by learning (Chapter 10) and stress (Chapter 14). Memory (Chapters 6–7) is constructed in the hippocampus and reconstructed by social pressure. Personality (Chapter 13) predicts health behavior (Chapter 14) and shapes how disorders express (Chapters 15–16). The AP exam will ask you to make exactly these connections.

Thank you for studying this material carefully. Psychology is not just an academic subject — it's a lens that changes how you understand yourself, the people around you, and the world. Use it wisely.