Therapy Homework Between Sessions: Why 46 Studies Show It Speeds Up Healing

You see your therapist for about an hour. Then the week starts, and you're on your own. That gap is not a flaw in the plan. It's the point. In a 2010 review of 46 controlled studies, therapy that included homework beat the same therapy without it (Kazantzis and colleagues, 2010). The session is where you get the map. The homework is where you walk the road.

So the "extra work" isn't really extra. In a lot of ways, it's the main event. Let's look at why your therapist asks for it, what it does, and what it actually looks like on a normal week.

Why does your therapist give you homework?

Your therapist gives you homework because one hour a week is a short time to change an old pattern. You might meet 4 sessions a month. The other 26 days are where new habits either stick or slip. The research is clear here. Adding homework to therapy raised results by a medium amount across 46 studies (d = 0.48, Kazantzis and colleagues, 2010).

Think about what you're really trying to do in therapy. You might be learning to notice a feeling before it takes over. Or teaching your body that rest is safe, after years of bracing for the next hit. That kind of change doesn't happen in one sitting. It happens with practice, the way any new skill does.

The session is the lesson. The week is where you practice it. Your therapist stays the guide and the witness, even when they're not in the room. But the reps happen at home, when the stress is real and no one is coaching you.

That's not a knock on therapy. It's just how learning works. You wouldn't learn to swim by watching one lesson and never getting in the water. This is the same. The pool is your regular life.

In that 2010 review, people who got homework improved more from start to finish (d = 1.08) than people who didn't (d = 0.63). Same treatment. Different amount of practice. Different result.

Does therapy homework actually work?

Yes, and the pattern shows up over and over. In a review of 23 studies covering 2,183 people, those who actually did their homework had better outcomes than those who didn't (r = .26, Mausbach and colleagues, 2010, in Cognitive Therapy and Research). It held across depression, anxiety, and substance use.

Let me put that number in plain terms. The "r = .26" is a way researchers measure how strongly two things move together. It's not enormous. But it's steady, and it points the same way across very different problems. Doing the work tends to help. Skipping it tends to cost you.

This isn't a new idea, either. The first big review of therapy homework, back in 2000, found the same thing. Assigning homework had a moderate positive effect on how people did (r = .36, Kazantzis, Deane and Ronan, 2000). Study after study has kept confirming it since.

So when your therapist suggests something to try before next time, they aren't making busywork. They're reaching for one of the most tested tools in the field.

What does between-session work actually look like?

Between-session work is rarely a worksheet with a grade at the top. It's usually small, specific practice that fits your real life. In a 2024 study of real-world clinics, researchers found homework shows up in many forms across different types of therapy (Bunnell and colleagues, 2024, in JMIR Human Factors). Here are some of the common ones:

• Noticing your body. Some therapies ask you to feel where stress sits, slowly and in small doses. This is called somatic, or body-based, work.
• Journaling. You write down a moment that stung, plus the thought you had right before it.
• Tracking your mood. You jot a quick number for how you felt each day, so patterns you can't see in the moment start to show up.
• Practicing a skill. You try a breathing tool, a boundary, or a kinder line of self-talk.
• Small experiments. You test a fear on purpose, in a safe and planned way, to see what really happens.

The kind of therapy you're doing shapes the practice. Different types of therapy lean on different tools. A skills-based therapy might hand you a worksheet. A body-based therapy might ask you to check in with your breath twice a day. Both are homework. Both count.

Here's one thing I want to name plainly. Homework should feel doable. If it starts to feel like a second job, say so. Good between-session work is small enough to actually happen on a hard week, not just an easy one.

How much of the homework do you need to do?

More practice usually means more progress, at least up to a point. In a 2016 review of 15 studies covering 1,537 people, the amount of homework someone did had a large link with getting better by the end of therapy (Hedges' g = 0.79, Kazantzis and colleagues, 2016, in Behavior Therapy).

You don't have to be perfect. You have to be fairly steady. A little practice most days beats a big cram the night before your session. That same review also hints that how well you do the work may matter as much as how much. That part rests on only a few studies, so hold it loosely. The steadier finding is simpler. Doing the practice, even imperfectly, helps.

If a week goes sideways and you do none of it, that's okay too. Just tell your therapist. What you skipped, and why, is useful. Sometimes the reason you couldn't do the homework is the exact thing worth working on next.

Does the homework cause the change, or just come with it?

This is the sharpest question, and a 2025 study got close to answering it. Researchers followed 113 people being treated for depression. When someone did more homework after one session, their depression scores dropped by the very next session (Kim and Xu, 2025, in Cognitive Therapy and Research).

Why does the timing matter so much? Because it's session to session. The practice came first. The improvement followed. That order is a strong hint that the homework is driving the change, not just tagging along with people who were already on the mend.

It's one study, and depression is only one condition. Still, it lines up with 25 years of reviews pointing the same direction. For people slogging through depression's flat, joyless stretches, that's a real reason for hope. The work you do between sessions appears to be doing real work.

What if you don't do the homework?

You're in very good company, and it helps to understand why. In a 2024 study, researchers ran 13 focus groups and surveyed 100 therapists. The most common reasons homework didn't happen were plain ones: being busy, forgetting, juggling too many materials, and low motivation (Bunnell and colleagues, 2024). Notice what's missing from that list. Nothing about you being lazy or broken.

Life gets loud. Tasks slip. This happens to almost everyone in therapy at some point, and therapists already know it. A skipped week is data, not a failing grade.

Here's why it's still worth talking about. Roughly 1 in 5 adults leave therapy before they finish (a weighted average of 19.7% across 669 studies, Swift and Greenberg, 2012). People stop for many reasons. One thing that helps folks stay is simply understanding what they're doing and why. When the homework makes sense, it's easier to keep showing up.

So if the practice keeps falling off, that isn't a reason to quit. It's a reason to bring it up. A good therapist will shrink the task, swap it for something else, or help you find what's getting in the way. Still wondering whether therapy is worth starting at all? Getting this rhythm, the hour together and the days in between, is a big part of the answer.

If you're in New York and curious what this could look like for you, you're welcome to reach out for a call. Finding the right therapist is the first small step. The practice grows from there.

Key takeaways

• The work between visits matters. Across 46 controlled studies, therapy with homework beat the same therapy without it (d = 0.48, Kazantzis and colleagues, 2010).
• It works across problems. Doing homework linked to better outcomes for depression, anxiety, and substance use (Mausbach and colleagues, 2010).
• Steady beats perfect. More practice was tied to better results by the end of therapy (g = 0.79, Kazantzis and colleagues, 2016).
• A skipped week is normal. Bring it to your session. The reason you couldn't practice is often the thing worth working on.

Frequently asked questions

Why do therapists call it "homework" if it's the real work?

The name is a habit, not a rule. Some therapists call it practice, an experiment, or a between-session task instead. Whatever the label, the point is the same. Across 46 controlled studies, therapy with these tasks beat therapy without them (Kazantzis and colleagues, 2010). Much of the change lives in the days between visits.

What if I don't have time for therapy homework?

Tell your therapist, and the task should get smaller. Good between-session work is small by design, often just a few minutes a day. In a 2024 study, being busy was one of the top reasons homework got skipped (Bunnell and colleagues, 2024). The fix is usually a clearer, smaller task, not more willpower or more free hours.

Does homework work for anxiety and depression, or just certain problems?

It works across many problems. A review of 23 studies and 2,183 people linked doing homework to better outcomes for depression, anxiety, and substance use (Mausbach and colleagues, 2010). A 2025 study of 113 people with depression found that more homework predicted lower depression by the next session (Kim and Xu, 2025).

Is it a problem if I skip a week?

No. Skipping happens to nearly everyone, and one missed week won't undo your progress. The overall pattern matters more than any single week. In a 2016 review of 1,537 people, steadier practice was linked to better results by the end of therapy (g = 0.79, Kazantzis and colleagues, 2016). Bring the skip to your session. It tells your therapist something useful.

Sources

1. Kazantzis, Whittington & Dattilio. Meta-Analysis of Homework Effects in Cognitive and Behavioral Therapy, Clinical Psychology: Science and Practice, 2010.
2. Mausbach, Moore, Roesch, Cardenas & Patterson. The Relationship Between Homework Compliance and Therapy Outcomes, Cognitive Therapy and Research, October 2010.
3. Kazantzis, Whittington, Zelencich, Kyrios, Norton & Hofmann. Quantity and Quality of Homework Compliance: A Meta-Analysis, Behavior Therapy, September 2016.
4. Kim & Xu. Homework Compliance and Session-to-Session Change in Cognitive Therapy for Depression, Cognitive Therapy and Research, September 2025.
5. Swift & Greenberg. Premature Discontinuation in Adult Psychotherapy: A Meta-Analysis, Journal of Consulting and Clinical Psychology, August 2012.
6. Kazantzis, Deane & Ronan. Homework Assignments in Cognitive and Behavioral Therapy: A Meta-Analysis, Clinical Psychology: Science and Practice, June 2000.
7. Bunnell, Schuler, Ivanova et al.. Homework in Real-World Therapy Settings: Barriers and Facilitators, JMIR Human Factors, December 2024.

Disclaimer

This article is for educational and informational purposes only. It does not constitute medical, clinical, legal, or therapeutic advice, and reading it does not create a therapist-client relationship with Matthew Sexton, LCSW or Matthew Sexton, LCSW, PLLC. Although the author is a licensed clinical social worker, the content in this article is not clinical assessment, diagnosis, or treatment.

The research and general observations here describe how between-session practice tends to work across many people in therapy. Every person and every course of therapy is different, and the kind of practice that helps one person may not fit yours. If you have questions about what between-session work would help you, or whether therapy is a good next step, please talk with a licensed mental health professional who can look at your specific situation.

If you are in immediate emotional crisis, you can reach the 988 Suicide & Crisis Lifeline by calling or texting 988 (US). If you are experiencing domestic violence or are in physical danger, contact the National Domestic Violence Hotline at 1-800-799-7233 or visit thehotline.org. In a life-threatening emergency, call 911.