Sometimes you do something and afterward think: Why did I do that? I knew better. It happened so fast. I just snapped.
DBT starts from a simple idea: behavior does not come out of nowhere. There is almost always a sequence that leads from one moment to the next. A chain analysis slows that sequence down so you can see it, and once you can see it, you can find where to break it next time.
This is not about deciding whether you were good or bad. It is about understanding what happened, what influenced you, what the behavior did for you in the moment, and where you could do something different.
Pick one specific, recent behavior you want to understand or change. Describe what someone watching a video could actually see or hear, not a judgment about yourself.
Not "I lost it" but "I raised my voice, called them a name, and left the room for the night."
Now go backward. What happened right before the chain began? It might be something someone did or said, a text, a facial expression, a memory, a thought, a bill, a mistake. It is simply the moment the story turned.
The prompting event is not automatically the cause. It is the event the chain started after.
Go further back. What was already happening, maybe hours or days earlier, that lowered your ability to cope? These are not the cause, but they turn up the volume. Tap any that fit, and add your own.
Imagine watching the moment in slow motion, from the prompting event to the behavior. Do not jump straight from "they said something" to "I exploded." Something happened in between. Add a link for each small step: a thought, an emotion, a body sensation, an action, or something happening around you.
Every link is a place you might intervene. Mark any link where you think you could have done something different.
First, the honest part. Even a harmful behavior usually does something for you in the moment. Naming that is not excusing it. It is how you understand why your brain keeps reaching for it.
e.g. released the anger, stopped the argument, dropped my anxiety, gave me a feeling of control.
Here is the whole sequence you built, laid out. The links you marked are your break points, the places a skill or a different choice could change what happens next.
Insight alone does not change behavior. Your brain needs to know: when X happens, I do Y. Make it concrete.
The best place to break a chain can be before it begins. Looking at your vulnerability factors, what is one thing you could change ahead of time? Sleep, food, stress, support, structure, or a boundary.
If the behavior hurt someone, broke trust, or left something that needs fixing, name what you can still put right. Repair is not self-punishment. It is taking responsibility for what can be corrected.