Does journaling actually help? What the research shows

Yes, journaling helps, but less than most articles claim and only in certain ways. Across dozens of randomized trials, writing about what upsets you produces a small, real drop in stress, anxiety and depressive symptoms, and the benefit tends to show up weeks later rather than the same night. The writing that helps is the kind that tries to make sense of a day. Writing that only pours out feelings, or that turns the same worry over and over, can leave you no better off, and sometimes worse.

What does the research actually say about journaling?

Most of the evidence traces back to one experiment. In 1986, James Pennebaker and Sandra Beall asked college students to write for 15 minutes on four consecutive days about the most upsetting experiences of their lives, while a control group wrote about neutral topics like their shoes or their room. Four months later, the expressive writers had made fewer visits to the campus health center (Pennebaker and Beall, 1986, as summarized in Baikie and Wilhelm, 2005).

That study launched hundreds more, and the early numbers looked big. Joshua Smyth’s 1998 meta-analysis of 13 studies in healthy people found an average effect of d = 0.47, a moderate effect on reported health, well-being and daily functioning (Smyth, 1998).

Then the evidence grew, and the effect shrank. Joanne Frattaroli pooled 146 randomized studies in 2006 and found an average effect of r = .075 (Frattaroli, 2006). It was positive and statistically significant, and it was small. A 2023 meta-analysis by Lin Guo looked only at randomized trials with long-term follow-ups, 31 studies and 4,012 people, and found the same picture. Expressive writing reduced symptoms of depression, anxiety and stress with a Hedges’ g of −0.12, small but significant (Guo, 2023).

For people with a diagnosed mental illness, a 2022 review of 20 randomized trials found that journaling reduced symptom scores about 5% more than control conditions did. The authors called the benefit small to moderate, flagged how inconsistent the studies were, and still recommended journaling as an add-on to standard care, because it costs little and carries low risk (Sohal et al., 2022).

So the honest answer is that journaling works the way a daily walk works. Across a large group, the change is measurable. On any given Tuesday, you may not feel it.

What did those studies actually ask people to do?

The research tests one specific exercise, and it barely resembles the diary on your nightstand. The standard instructions ask you to write your very deepest thoughts and feelings about something that has affected you, for 15 to 20 minutes, on three to five days, without worrying about spelling or grammar. The one rule is to keep writing until the time is up (Baikie and Wilhelm, 2005).

That leaves some gaps. Few trials test years of nightly diary entries or three lines about lunch. When an article says “studies show journaling reduces anxiety,” it is usually stretching findings from a four-day writing exercise to cover everything people do in a notebook.

Two details from the research carry over well to everyday journaling, though.

The first is spacing. In Guo’s 2023 analysis, studies with one to three days between writing sessions produced stronger effects than studies that spaced sessions four or more days apart. Writing often seems to matter more than writing long.

The second is patience. The same analysis found that the benefit appeared at later follow-ups, not right after the writing ended. If you journal for a week and feel nothing, that is roughly what the trials predict.

Why might journaling make you feel worse at first?

Many people quit after one hard entry, so this one is worth knowing in advance. Writing about something painful usually makes you feel worse for a while. Smyth’s 1998 meta-analysis found that the writing task increased distress immediately afterward, and that this short-term distress was unrelated to the later health benefits (Smyth, 1998). Baikie and Wilhelm describe the same pattern, a short rise in negative mood and physical symptoms that does not appear to cause lasting harm.

Think of it like cleaning out a cupboard. For an hour, the kitchen looks worse than when you started.

That dip should pass. If writing leaves you more upset day after day, or pulls you back into something you can’t climb out of, stop and talk to a professional. Some people, especially those working through trauma, do better writing with a therapist’s help.

Which kind of journaling helps, and which can backfire?

This is the part most “benefits of journaling” lists leave out, and the research is fairly clear on it.

In a 2002 study, Patricia Ullrich and Susan Lutgendorf had 122 students journal for a month about a stressful event. One group wrote only about their emotions. Another wrote about their emotions and also tried to understand the event. A third wrote about news stories. The people who combined feeling with thinking became more aware of what they had gained from the stressful event. The people who wrote about emotions alone reported more severe illness symptoms during the study than either of the other groups (Ullrich and Lutgendorf, 2002).

Venting onto a page is not the same as making sense of what happened, and only one of them reliably helps.

Pennebaker found the same thing in the words people used. Reanalyzing six earlier experiments, he and his colleagues showed that writers who used more causal and insight words over the days of writing, words like because, realize and understand, had better physical health afterward (Pennebaker, Mayne and Francis, 1997).

There is also a reason writing beats lying awake thinking about the same thing. In two longitudinal studies, Jiyoung Park, Özlem Ayduk and Ethan Kross found that expressive writing helped people step back and see a distressing event from a little further away, a habit psychologists call self-distancing. That distance predicted less emotional reactivity one month and six months later (Park, Ayduk and Kross, 2016). Writers who used more causal words and fewer first-person pronouns gained the most distance. Sonja Lyubomirsky and colleagues found that people who wrote or talked about their worst experience ended up with better life satisfaction and health than people who only thought about it privately (Lyubomirsky, Sousa and Dickerhoof, 2006).

That same study has a twist. People who wrote about their happiest moments, especially those who picked them apart, ended up with lower well-being than people who simply replayed those moments. Analysis helps you get past a bad day. A good day mostly needs to be enjoyed.

Thinking in circles has a name too. Susan Nolen-Hoeksema spent decades showing that rumination, the repetitive focus on how bad you feel and why, worsens depression, increases negative thinking and gets in the way of solving problems (Nolen-Hoeksema, Wisco and Lyubomirsky, 2008). A journal can turn into a place to ruminate on paper. The difference between the two is covered in more depth in rumination vs. reflection.

Does journaling help with anxiety, depression and sleep?

Some forms do, with caveats on each.

For depression, a small trial by Katherine Krpan and colleagues gave 40 people with diagnosed major depressive disorder either expressive writing or neutral writing for 20 minutes on three days. Depression scores fell in the expressive writing group, and the improvement held four weeks later (Krpan et al., 2013). Forty people is a small sample, and the authors describe writing as a supplement to treatment, not a replacement.

For anxiety, Smyth and colleagues tested positive affect journaling in 70 medical patients with elevated anxiety. Patients did 15-minute online positive affect journaling sessions, an emotion-focused writing practice, three days a week for 12 weeks. Compared with usual care, they reported less anxiety and fewer depressive symptoms after the first month (Smyth et al., 2018). Gratitude writing has older support too. In Robert Emmons and Michael McCullough’s studies, people who kept regular lists of what they were grateful for showed higher well-being on several measures, with positive mood the most reliable gain (Emmons and McCullough, 2003). There’s a fuller how-to in journaling for anxiety.

Part of the reason writing calms is that it forces you to name things. In a brain imaging study, Matthew Lieberman’s team found that labeling the emotion in an upsetting image dampened the amygdala’s response compared with other ways of processing the same image (Lieberman et al., 2007). More on that in name your feelings.

For sleep, timing and content both matter. Michael Scullin’s lab at Baylor had 57 young adults write for five minutes before bed while sleep was measured in the lab. People who wrote a specific to-do list for the coming days fell asleep in about 16 minutes on average. People who wrote about tasks they had already finished took about 25 (Scullin et al., 2018). If your head fills up at night with what’s coming, getting it onto paper seems to help. See racing thoughts at night for a routine built on this.

Writing can even reach the body. In a New Zealand trial, older adults who did expressive writing had 76% of small skin wounds fully healed at day 11, against 42% in the comparison group (Koschwanez et al., 2013). The same study found no difference in stress or depressive symptoms, which is a fair reminder that effects show up in some measures and not others.

Journaling is not treatment for an anxiety disorder, depression or insomnia. If symptoms are getting in the way of your days, talk to a doctor or therapist. If you are in crisis, find help now.

Why do most people stop journaling?

If the evidence says writing helps, why are so many notebooks empty after page six?

Some of it is the blank page. Sitting down at 10 p.m. to write the “deepest thoughts and feelings” about a day you are too tired to remember is hard. Most of what happened has already blurred. The irritation at 2 p.m., the message you didn’t send, the moment on the walk home when your chest finally loosened, are gone by the time you open the notebook.

Apps don’t fix this on their own. When Amit Baumel and colleagues tracked real-world use of 93 popular mental health apps, the median app kept 3.9% of its users after 15 days and 3.3% after 30 (Baumel et al., 2019). The same data showed that use of most kinds of app peaked toward the evening, the hour when people tend to look back on the day.

The research also hints at a quieter reason. The writing that helps asks you to do two jobs at once, feel the thing and make sense of it. Left alone with a page, most people do the first job and skip the second. That is how journals turn into logs of complaints that nobody, including the writer, wants to reread.

After a hard stretch during COVID, a therapist taught Auserene’s founder, Himanshu Pathak, to journal. The journal worked because someone helped him make sense of what he wrote. When the sessions ended, that help was gone. He tells the story in his letter, and it’s the reason Auserene is built around a conversation rather than a blank page.

How to journal in a way that matches the evidence

Auserene is built around this sequence, but you don’t need an app for any of it. A notebook works. Here is a short method drawn from the studies above.

1. Catch moments during the day. Write one line when something lands, a mood, a sentence someone said, a worry. Evening-you will not remember it accurately. More on fitting this into a day in paper vs. digital journals.
2. Give the evening 10 to 20 minutes, most days. Guo’s analysis favored sessions one to three days apart. Short and frequent beats long and rare.
3. Name what you felt. Be specific. “Annoyed and a bit embarrassed” tells you more than “bad.”
4. Then ask why. Use the words that predicted improvement in Pennebaker’s data. What happened because of what? What do you realize now that you didn’t this morning?
5. Step back once. Write a sentence about yourself in the third person, or ask what you’d say to a friend who had this day. That is self-distancing on paper.
6. Let good days be good. Write down what happened and enjoy it. Lyubomirsky’s work suggests dissecting happy moments can take some of the shine off.
7. If tomorrow is keeping you up, make a list. Five minutes, specific tasks, then close the notebook.
8. Give it a month before you judge it. The trials found benefits at follow-up, not the next morning.

If you want ready-made questions for step 4, try evening reflection questions. If you’re weighing a chatbot as your journal, read using ChatGPT as a journal first, especially the part about what happens to your words.

Every number in this piece, and the rest from our research, is collected on one page: journaling statistics.

So, does journaling work?

It works modestly, slowly, and for the kind of writing that tries to understand rather than only release. The best evidence is a few hundred trials of a four-day exercise, with small average effects and real variation from person to person. That is less than the listicles promise, and more than nothing for something that costs a pen and fifteen minutes.

If you’ve tried journaling and quit, the problem may not have been you. The writing that helps asks for feeling and sense-making at the same time, at the end of a day when you have little left for either. Make it easier on yourself. Write things down while they’re small, come back to them in the evening, and ask the one question that turns a list of feelings into a story. That question is usually why.