Group therapy is a form of psychotherapy where one or two therapists work with several people at the same time, typically 7 to 10 members. Sessions usually last 90 to 120 minutes and take place in a private room with chairs arranged in a circle so no one seat feels more important than another. It’s one of the most widely used formats in mental health care, applied to conditions ranging from depression and anxiety to substance use and grief.
How a Session Actually Works
If you’re picturing a scene from a movie where strangers sit in a circle and take turns sharing, that’s not entirely wrong, but it’s incomplete. The therapist isn’t just moderating a conversation. They’re actively shaping the session in several ways: setting boundaries around what topics are explored and how emotionally intense the discussion gets, helping members identify and express their thoughts and feelings, and guiding the group toward understanding both themselves and each other. When two therapists co-lead, the group benefits from richer dynamics and fewer disruptions if one therapist is absent.
Groups can be closed or open. A closed group starts and ends together over a set number of sessions, meaning no new members join after it begins. An open group runs continuously, with people entering and leaving as needed. The format depends on the setting and the goals. A 12-week program for social anxiety, for example, would typically be closed, while a weekly support group at a treatment center might stay open indefinitely.
Session frequency varies. Outpatient groups commonly meet once a week for 90 minutes or longer. In residential or hospital settings, groups may meet daily, with shorter sessions of around 45 minutes.
Why a Group Setting Helps
The psychiatrist Irvin Yalom identified 11 therapeutic factors that explain why group therapy works. You don’t need to memorize them, but several are worth understanding because they describe experiences you can’t replicate in individual therapy.
Universality is one of the most powerful. Many people walk into therapy believing their struggles are uniquely shameful or isolating. Hearing others describe the same fears, habits, or pain can be immediately relieving. That “I’m not the only one” moment often shifts something before any formal technique is applied.
Interpersonal learning is another. In a group, you interact with real people in real time. If you tend to withdraw during conflict, over-apologize, dominate conversations, or struggle to ask for what you need, those patterns will surface naturally. The group becomes a low-stakes place to notice those tendencies, get honest feedback, and practice doing things differently.
Other factors include the instillation of hope (seeing others improve), altruism (feeling useful by helping someone else in the group), catharsis (expressing emotions openly in a safe space), and group cohesiveness (the sense of belonging that develops over time and makes the work feel meaningful). These factors work together, and different ones matter more at different stages of the group’s life.
How Groups Develop Over Time
Groups don’t start productive and stay that way. They evolve through predictable stages, often described as forming, storming, norming, performing, and adjourning.
In the forming stage, members are polite and cautious. Everyone avoids conflict because the need to be accepted is strong. People look to the therapist for direction. As the group moves into storming, tensions surface. Members may disagree, challenge each other, or push back on the therapist’s leadership. This phase feels uncomfortable but is necessary for the group to build real trust.
During norming, the group finds its rhythm. Members develop shared expectations, and leadership becomes more distributed rather than relying entirely on the therapist. By the performing stage, the group functions with genuine interdependence. Members adapt to each other’s needs, take risks, and do meaningful emotional work. If the group has a set endpoint, an adjourning stage gives members space to process the ending and reflect on what they’ve gained.
Common Types of Groups
Not all group therapy looks the same. The three most common formats serve different purposes:
- Psychoeducational groups focus on teaching skills and information. A group for managing panic attacks, for example, might walk members through breathing techniques, explain how the body’s stress response works, and assign practice exercises between sessions. These groups tend to be more structured, with the therapist guiding most of the content.
- Process groups focus on the interactions between members. The conversations themselves are the therapy. Members explore how they relate to each other, and the therapist helps them see patterns in those interactions that mirror what happens in their lives outside the room.
- Support groups center on shared experience, such as bereavement, chronic illness, or caregiving. The emphasis is on mutual understanding and emotional connection rather than skill-building or behavioral change.
Some groups blend these approaches. A substance use recovery group might include psychoeducation about triggers alongside open processing of members’ experiences during the week.
How It Compares to Individual Therapy
One of the most common concerns people have is whether group therapy is “as good as” individual therapy. For many conditions, the evidence suggests it is. One study comparing individual and group psychotherapy for schizophrenia found that group treatment was significantly more effective at improving patient-rated outcomes at both 12 and 24 months, while neither format was better at preventing relapse or rehospitalization.
Group therapy offers things individual therapy simply cannot. You get to witness other people’s growth, practice social skills in real time, and receive feedback from peers rather than just a therapist. Individual therapy, on the other hand, gives you undivided attention, deeper exploration of personal history, and more flexibility to set the agenda each session. Many people benefit from doing both simultaneously.
Cost and Accessibility
Group therapy is significantly less expensive than individual therapy. Because the therapist’s time is shared across multiple participants, per-person costs drop substantially. One study of cognitive behavioral therapy for alcohol use disorder found that the average cost per participant was $304 in the group format compared to $858 for individual treatment, a savings of roughly 65%. Labor (the therapist’s time) accounts for the vast majority of therapy costs, so spreading it across a group makes a real financial difference.
This cost advantage also makes group therapy more accessible in systems with limited resources, such as community mental health centers, VA hospitals, and residential treatment programs. If cost is a barrier to getting help, group therapy may allow you to access evidence-based treatment that would otherwise be out of reach.
Confidentiality in a Group Setting
Privacy is a reasonable concern when you’re sharing personal information with strangers. Therapists are bound by ethical guidelines to describe the roles, responsibilities, and limits of confidentiality at the very first session. The American Psychological Association’s ethics code specifically requires this for group settings.
Here’s the practical reality: your therapist is legally and professionally obligated to keep what you share confidential, but your fellow group members are not bound by the same legal standards. Most groups establish a clear agreement that what’s said in the room stays in the room, and therapists reinforce this expectation regularly. Breaches are uncommon, but they’re not impossible, and a good therapist will be transparent about that distinction from the start.
What to Expect at Your First Session
If you’re considering joining a group, the therapist will typically do a screening beforehand, either by phone or in a brief individual meeting. This helps them determine whether the group is a good fit for your needs and gives you a chance to ask questions.
At the first session, expect introductions, a review of group rules (confidentiality, attendance expectations, how to handle disagreements), and likely some nervousness from everyone in the room. You won’t be pressured to share your deepest struggles on day one. Most groups build gradually, and the therapist controls the pace so members feel safe before the work gets more intense. The circle of chairs, the initial awkwardness, the slow discovery that other people carry similar weight: that’s where it begins.