Group Therapy: Definition, Types, Benefits, and What to Expect

Group therapy is a form of psychotherapy in which one or more trained clinicians treat a small, deliberately assembled group of clients simultaneously. Typically comprising 5 to 15 members, the group meets on a regular schedule — usually weekly — and uses the interpersonal dynamics among participants as a core mechanism of therapeutic change. Unlike individual therapy, where the relationship between therapist and client is the primary vehicle for healing, group therapy harnesses peer interaction, mutual support, shared feedback, and social learning to address psychological difficulties.

The practice has deep roots in clinical psychology and psychiatry, dating back to the early 20th century. It was formalized and popularized by clinicians such as Irvin Yalom, whose influential framework identifies therapeutic factors — including universality (realizing others share similar struggles), altruism, interpersonal learning, group cohesion, and instillation of hope — as the active ingredients that make group therapy effective.

Group therapy is used across a wide range of clinical settings, including outpatient mental health clinics, inpatient psychiatric units, substance use treatment programs, forensic settings, and community health centers. It is applied as a standalone treatment or as an adjunct to individual therapy and pharmacotherapy.

Research supports the use of group therapy for numerous conditions, including:

• Major depressive disorder and persistent depressive disorder
• Anxiety disorders, including social anxiety disorder and generalized anxiety disorder
• Substance use disorders
• Post-traumatic stress disorder (PTSD)
• Personality disorders, particularly borderline personality disorder, where group-based dialectical behavior therapy (DBT) skills training is a core component of treatment
• Eating disorders
• Grief and bereavement

The American Psychological Association recognizes group therapy as an evidence-based treatment modality. Meta-analytic research consistently demonstrates that group therapy produces outcomes comparable to individual therapy for many conditions, with the added advantages of cost-effectiveness and access to peer support.

Several distinct models of group therapy are used in clinical practice:

• Cognitive-behavioral therapy (CBT) groups: Structured, skills-focused groups that teach members to identify and restructure maladaptive thought patterns and behaviors.
• Process-oriented (interpersonal) groups: Less structured groups that focus on here-and-now interactions among members, using the group dynamic itself as a mirror for relational patterns in daily life.
• Psychoeducational groups: Groups centered on teaching members about a specific condition — such as bipolar disorder or chronic pain — and equipping them with coping strategies.
• Support groups: Groups that prioritize shared experience and emotional validation, often organized around a common issue like grief, caregiving, or chronic illness. These might be led by a licensed clinician.
• DBT skills training groups: A structured component of dialectical behavior therapy that teaches mindfulness, distress tolerance, emotion regulation, and interpersonal effectiveness skills.

The choice of group type depends on the treatment goals, the population served, and the clinical setting.

Irvin Yalom's framework identifies several therapeutic factors that drive change in group therapy:

• Universality: Discovering that one's struggles are not unique, which reduces shame and isolation.
• Altruism: The experience of helping others in the group, which enhances self-worth and a sense of purpose.
• Interpersonal learning: Receiving honest feedback from peers about how one's behavior affects others, enabling real-time correction of maladaptive relational patterns.
• Group cohesion: The sense of belonging and trust within the group, analogous to the therapeutic alliance in individual therapy.
• Catharsis: The emotional release that comes from expressing difficult feelings in a safe, accepting environment.
• Instillation of hope: Witnessing the progress of other group members, which fosters belief in one's own capacity for change.

These factors interact dynamically throughout the course of treatment and are cultivated by the therapist's facilitation of group norms, safety, and open communication.

Psychotherapy — the broader category of talk-based treatments for psychological disorders, of which group therapy is one modality.

Family therapy — a related but distinct modality that treats relational dynamics within a family system rather than an assembled group of unrelated individuals.

Therapeutic alliance — the collaborative bond between therapist and client; in group therapy, this extends to the concept of group cohesion, the bond among all members.

Process group — a specific type of group therapy emphasizing in-the-moment interpersonal dynamics rather than structured content.

Self-help group — peer-led groups (e.g., Alcoholics Anonymous) that share features with group therapy but are not conducted by licensed clinicians and are not classified as psychotherapy.

Group therapy is a cornerstone of modern mental health care for both clinical and practical reasons. Clinically, it offers something individual therapy cannot: a live social laboratory where clients practice new interpersonal skills, receive feedback from multiple perspectives, and experience the healing power of belonging. For individuals whose difficulties are fundamentally relational — such as those with features consistent with personality disorders — the group setting directly targets the core problem.

From a practical standpoint, group therapy is more cost-effective than individual treatment, allowing clinicians to serve more clients with fewer resources. This makes it especially valuable in settings with high demand and limited staffing, including community mental health centers, Veterans Affairs facilities, and inpatient units.

Individuals experiencing patterns consistent with depression, anxiety, trauma, substance use, or interpersonal difficulties may benefit from exploring group therapy as part of a comprehensive treatment plan. A mental health professional can help determine whether group therapy — alone or combined with individual treatment — is appropriate for a given person's needs.

If you are struggling with emotional distress, relationship difficulties, grief, substance use, or symptoms of a mental health condition, group therapy may be a valuable component of treatment. Speak with a licensed mental health professional — such as a psychologist, licensed clinical social worker, or psychiatrist — who can conduct a thorough evaluation and recommend whether group therapy, individual therapy, or a combination of approaches is most appropriate for your situation.

Group therapy is not a substitute for emergency care. If you are in crisis or experiencing thoughts of self-harm or suicide, contact the 988 Suicide and Crisis Lifeline (call or text 988), go to your nearest emergency department, or call emergency services immediately.