Group Therapy: How It Works and Who Benefits Most

The idea of sitting in a circle with strangers and talking about the hardest parts of your life can sound like the last thing you want. Maybe you’ve pictured it and felt your stomach drop. Maybe you’re wondering whether a group means less help than one-on-one care. Those are reasonable worries, and they deserve real answers before you decide.

Humans are social by design, and many struggles feel heavier when you believe you’re the only one carrying them. Hearing someone else say “me too” can be a genuine relief. Group therapy uses that wiring on purpose. A trained clinician shapes the room so that feedback, modeling, and belonging do therapeutic work, with the same precision a structured one-on-one session brings to a single relationship.

Individual therapy is what most people picture, and it has earned that place. For adults with social anxiety disorder, NICE’s social anxiety guidance names individual CBT as the first talking treatment and advises against routinely offering group CBT in its place. One-on-one care gives you undivided attention and a plan built entirely around you. The results are real, and the evidence behind it is solid.

But one-on-one isn’t the only format with that kind of evidence, and at Siggy we’d rather help you choose the format that fits your condition than assume one size fits everyone. Group therapy, meaning a clinician-led treatment delivered to several people at once, has been tested in dozens of randomized trials for anxiety and depression. For many people, it holds up about as well as individual care. In head-to-head studies, the difference between the two formats is usually small.

What This Page Covers

• The Short Answer
• How Does Group Therapy Work?
• What Are the Main Types of Group Therapy?
• Does Group Therapy Work?
• Group vs. Individual Therapy: Which Is Better?
• Who Benefits Most From Group Therapy?
• How Group Therapy Pairs With Medication
• What to Ask Before You Join

The Short Answer

Group therapy is psychotherapy led by one or two trained clinicians for a small group of people, often built around a shared concern like anxiety or depression. For anxiety disorders and depression, research shows it works well, and often about as well as individual therapy.

It’s not the best first choice for everyone. Individual therapy is generally preferred first for social anxiety disorder and PTSD, and for people in acute crisis. Group therapy also pairs well with medication, since therapy and antidepressants tend to add to each other.

How Does Group Therapy Work?

According to a StatPearls clinical review from the National Library of Medicine, groups typically have 7 to 10 members, sessions usually run 90 to 120 minutes, and one or two therapists lead. Groups can be closed, with the same members for a set number of sessions, or open, with people joining and leaving over time.

Before you join, the leader usually meets with you to check fit and explain the group’s goals, attendance expectations, and confidentiality rules. What happens in sessions depends on the approach. A CBT group can feel like a class with practice built in, while an interpersonal group spends more time on what happens between members.

The review describes several ingredients that help explain why groups work:

• Universality: realizing others share your feelings and problems.
• Instillation of hope: watching other members improve.
• Interpersonal learning: getting honest feedback and trying new ways of relating.
• Altruism: helping someone else, which can improve how you see yourself.
• Cohesion: the emotional bond among members.

Cohesion carries real weight. A 2018 meta-analysis of 55 studies found a moderate link between group cohesion and how much members improved, across settings and diagnoses.

What Are the Main Types of Group Therapy?

“Group therapy” describes how care is delivered, not which treatment you get. The StatPearls review and the American Psychological Association describe a range of formats:

Format	Main Focus	Structure	Led By
CBT group	Thoughts, feelings, behaviors	Highly structured, set number of sessions	Trained clinician
Interpersonal group	Relationship patterns	Leader builds cohesion to explore them	Trained clinician
Psychodynamic group	Insight into unconscious patterns	Nondirective leader	Trained clinician
Skills group	A specific skill set, such as social skills	Organized around one skill set	Trained clinician
Support group	Shared experience and encouragement	Informal	Often peers

The APA notes that formal group therapy goes beyond informal support groups because it’s led by clinicians with specialized training who teach strategies for specific problems. Support groups can still be valuable, especially between or after treatment.

Groups can also meet online, and the StatPearls review notes growing evidence that online group therapy can be effective.

Does Group Therapy Work?

For anxiety, the evidence is strong. A 2020 meta-analysis pooled 57 randomized trials with 3,656 participants who had generalized anxiety disorder, social anxiety disorder, or panic disorder. Group therapy reduced anxiety symptoms much more than no treatment and more than comparison treatments offering only general support. It showed no significant difference from individual therapy or from medication, though only seven and six comparisons tested those questions.

For depression, a 2014 meta-analysis of 35 trials found group CBT worked clearly better than inactive comparison conditions, with dropout similar to controls. The authors cautioned that more than 60% of the studies didn’t report enough to judge certain risks of bias.

PTSD is the notable exception. The National Center for PTSD reports that the evidence for group treatments is too limited to recommend them, and one trial found individual cognitive processing therapy more effective than the group version.

Group vs. Individual Therapy: Which Is Better?

Head-to-head, the gap is usually small. A 2008 meta-analysis of 15 depression studies found individual therapy slightly more effective right after treatment and linked to lower dropout, but no significant difference at follow-up. The authors weren’t sure the short-term gap mattered clinically.

The right choice depends on what you need:

• Individual therapy may fit better if you’re in acute distress, have PTSD or social anxiety disorder, or need a plan built around complex personal circumstances.
• Group therapy may fit better if you feel isolated, want to practice relating to others, or would benefit from seeing people further along in recovery.
• Both together is an option. Some people see an individual therapist and attend a group, which works best when the two clinicians communicate.

Cost and access matter too. The StatPearls review notes that because group therapy performs comparably, it can be more cost-effective and can widen access to care.

Who Benefits Most From Group Therapy?

The StatPearls review lists group therapy as an evidence-based option for depression, anxiety disorders, obsessive-compulsive disorder, eating disorders, chronic pain, and several other conditions. Within those, people tend to do well in group when they:

• Feel alone with what they’re going through.
• Want to work on how they relate to others.
• Are motivated to attend regularly.
• Are open to giving and receiving feedback.

The review also notes that people in acute distress are unlikely to tolerate a group well, and that low motivation or difficulty connecting with others can make a group harder to use. If you’re in crisis, individual care comes first.

For social anxiety, a group can feel like facing the fear head-on, which is partly the point, but NICE still recommends individual CBT first for adults. If one-on-one isn’t available or you’d prefer a group, it’s worth discussing with a clinician.

How Group Therapy Pairs With Medication

Therapy and medication often work better together than either alone. A 2014 meta-analysis of 52 trials with 3,623 patients found that combining psychotherapy with antidepressant medication was more effective than medication alone, with about one additional person benefiting for every four treated. The advantage was clearest for major depression, panic disorder, and OCD, and it lasted up to two years. These trials tested psychotherapy in general, not group therapy specifically.

In practice, pairing a group with medication works best when everyone stays connected. The StatPearls review advises group leaders to get a medication history, since sedation or a worsening of symptoms can affect how someone functions in the group. Tell your group leader what you take, and tell your prescriber how the group is going.

What to Ask Before You Join

A short conversation with the leader can tell you a lot:

• What approach does the group use, and what happens in a typical session?
• Is it closed or open, and how many sessions does it run?
• How many members are there, and what do they have in common?
• What are the confidentiality rules, and what happens if someone breaks them?
• How will we know whether it’s helping?

Confidentiality deserves a direct question. The StatPearls review notes that confidentiality rules in groups vary by jurisdiction and state and should be covered during informed consent. If you’re having thoughts of suicide, call or text 988, and if you’re in immediate danger, call 911.

Repeating your story is a common frustration when medication and therapy live in separate places.

Group therapy is easy to overlook, but its evidence rivals one-on-one therapy for anxiety and depression, and it works well alongside medication. If you’re weighing talk therapy against medication, our guide to medication vs. therapy for depression walks through the tradeoffs.

Ready to take control of your mental health? Start your anonymous intake with Siggy and get your plan reviewed by a licensed prescriber.

This article is for education only and isn’t a substitute for personal medical or mental health advice. It was reviewed for clinical accuracy and reflects sources available as of September 2026.