Boundaries and Saying No: A CBT Guide to Assertiveness

Based in part on The PTSD Workbook by Mary Beth Williams and Soili Poijula.

Maya always says yes at work. Another report, another late meeting, a colleague's task "this once." She tells herself it is easier than arguing, and that being helpful is who she is. By Thursday she is exhausted and a little resentful, and nobody knows, because she said yes every time.

"Set better boundaries" is common advice, and it often fails because it skips the question that matters: what stops Maya from saying no? This guide treats boundaries the way CBT does. It looks at the prediction behind the yes, the patterns that keep it going, the skills for saying no well, and a way to test the fear in real life. It also takes seriously that, for many readers, family and community obligations are not an obstacle to be removed.

What a boundary is

A boundary is a limit on your time, energy, body or feelings that you state and act on. Williams and Poijula, writing for people recovering from traumatic stress, describe boundaries as a form of self-care: they protect personal space, and they let you interact with others while respecting theirs.

A boundary describes what you will do, not what others must do. "I'll leave the room if the shouting continues" is a boundary. "You must never raise your voice" is a demand. This matters because a demand depends on someone else's cooperation, and a boundary depends on you.

Why saying yes keeps itself going

Maya's yes has a prediction behind it: "If I say no, they'll be angry, or think less of me." CBT asks what the yes does with that prediction.

Saying yes to prevent a feared reaction is a safety behavior: an action taken to prevent a feared outcome (Salkovskis, 1991). It works in the short term, because the discomfort passes. But it blocks learning. Maya never discovers what happens when she declines, so the prediction is never tested, and every yes strengthens the belief that she must say it. Resentment and exhaustion then accumulate. The cycle is: prediction, yes, relief, untested prediction.

Where the pattern comes from

Schema therapy (Young, Klosko and Weishaar, 2003) offers a longer view. It proposes that people have core emotional needs, including the freedom to express their own needs and feelings. When a child learns that love depends on pleasing others or staying quiet, patterns can form that follow into adulthood. Two are relevant:

• Subjugation: suppressing your own preferences, decisions and sometimes anger, out of fear of consequences such as rejection or retaliation.
• Self-sacrifice: putting other people's needs first, voluntarily, at your own expense, often to avoid causing them pain or to avoid guilt.

These are not diagnoses and not character flaws. They are learned strategies that once made sense. Seeing them helps explain why saying no can feel unsafe, not only uncomfortable, and why the advice to "be more assertive" so often fails. A therapist can help you trace where the pattern came from and what it needs now.

Culture and family

The audience of this site includes many readers from communities where obligations to parents, elders and extended family are central. In research on culture and the self (Markus and Kitayama, 1991), interdependence, meaning that people see themselves as connected to others and act to maintain harmony, is described as a normal and valued way of being, not a problem. For readers in such settings, the goal is rarely to cut obligations. It is often to find a way to honor the relationship and your own limits at once: to say "not this Sunday, but I will come on Thursday," instead of "no."

Saying no in a family also has costs that saying no to a colleague does not. You may share a home, money or care for a relative. Change can be slower, and it can be good to take it step by step, perhaps with your therapist's help. A boundary is not a verdict on whether you love someone.

Signs a boundary has been crossed

Your body and mood often tell you first: tension in the jaw or stomach, feeling drained after a particular request, saying yes while thinking no, a flash of resentment bigger than the moment, or dreading something you agreed to. Resentment is useful information. It often marks something that mattered to you and was not protected. It is a signal to look at, not a sign that you are a bad person.

Skills for saying no well: DBT interpersonal effectiveness

Dialectical behavior therapy (DBT) teaches interpersonal effectiveness (Linehan, 2014) with three sets of skills, each protecting a different thing.

DEAR MAN: getting what you ask for, or saying no clearly.

• Describe the situation in facts.
• Express how you feel or think about it.
• Assert what you want or do not want, clearly.
• Reinforce: say what is good for the other person if they agree.
• Stay Mindful of your goal; if the other person changes the subject, return to it ("broken record").
• Appear confident, using a steady voice and posture.
• Negotiate, and offer alternatives.

GIVE: protecting the relationship. Be Gentle (no attacks or threats), act Interested, Validate the other person's feelings, and use an Easy manner.

FAST: protecting your self-respect. Be Fair to yourself and the other person, make no unnecessary Apologies, Stick to your values, and be Truthful.

Maya's manager asks her to take another report on Thursday afternoon. Putting the skills together might sound like this:

"Thanks for thinking of me. I already have two deadlines this week, and I can't take this on today. I can look at it on Monday, or help you find someone else."

Notice what she did not do. She did not list excuses, which invites negotiation. She did not apologize five times. She did not pretend to be busy. Her voice stayed warm. Other versions:

• A partial yes: "I can't do all of it, but I can do this part."
• A later yes: "Not this week. Ask me again next month."
• A calm repeat: "I understand, and I still can't take it on."

Test the fear: a behavior experiment

Skills are only half of it. The other half is the prediction. A behavior experiment (see our guide on behavioral experiments) tests it directly.

1. Write the prediction. "If I say no to this report, my manager will be angry and think I'm not committed."
2. Rate your belief from 0 to 100, and write what you expect: how angry, for how long, what will be said.
3. Choose a small test. A request that is not critical, a day you are able to follow through.
4. Do it without safety behaviors. Say your sentence without over-explaining or apologizing, and notice what happens.
5. Record what actually happened, and compare it with the prediction.
6. Re-rate your belief. Then repeat in different situations, because one result is a data point, not a rule.

Sometimes the result confirms the prediction: the person is displeased. That is also useful. You have learned that you can tolerate it, and what the actual cost is, and you can decide with real information. If the reaction is serious or harmful, your safety comes first.

The Dysfunctional Thoughts Test can help before and after: write the thought, look at the evidence for and against, and ask what you would say to a friend.

When this is hard

For some people the difficulty is not skill. If you have lived with abuse, control or fear, saying no may be unsafe, and you may freeze. If a boundary is being crossed in a way that frightens you, getting safe and supported comes before rehearsing a script. Recalling past experiences may also bring up distress. Take that at your own pace, ideally with a therapist.

When to get more help

If it is very hard to protect yourself, if you often feel unsafe, or if memories of past experiences leave you distressed, please talk to your therapist or doctor. You do not have to deal with this alone. In the app, you can open the Crisis tab at any time.

Sources

• Williams, M. B., & Poijula, S. (2013). The PTSD Workbook (2nd ed.). New Harbinger Publications.
• Linehan, M. M. (2014). DBT Skills Training Manual (2nd ed.). Guilford Press.
• Young, J. E., Klosko, J. S., & Weishaar, M. E. (2003). Schema Therapy: A Practitioner's Guide. Guilford Press.
• Salkovskis, P. M. (1991). The importance of behaviour in the maintenance of anxiety and panic: a cognitive account. Behavioural Psychotherapy, 19(1), 6-19.
• Bennett-Levy, J., et al. (Eds.) (2004). Oxford Guide to Behavioural Experiments in Cognitive Therapy. Oxford University Press.
• Markus, H. R., & Kitayama, S. (1991). Culture and the self: implications for cognition, emotion, and motivation. Psychological Review, 98(2), 224-253.