The research behind Implementation Intentions
Most of us have things we genuinely intend to do. Exercise more regularly. Call someone back. Apply for the job. Start saving. Go to bed earlier. Finish the project that has been sitting half-done for three weeks.
The problem is often not deciding that something matters. We have already done that part. The problem is getting from intending to do something to actually doing it.
Psychologist Peter Gollwitzer has spent decades studying this gap between intention and action. His research on implementation intentions suggests that one surprisingly effective way to improve follow-through is to decide in advance when and how you are going to act. Instead of simply forming a goal such as I want to exercise more, you connect the behavior to a specific situation: If it is Monday at 6 p.m., then I will go to the gym.
It sounds almost too simple to matter. Research suggests otherwise.
THE EXPERIMENT
In a 1997 study, Gollwitzer and Veronika Brandstätter asked university students to identify two personal projects they intended to complete during the Christmas holiday. One was supposed to be relatively easy and the other relatively difficult. These weren't tasks invented by the researchers. Participants chose things that were actually part of their lives, such as completing university work, resolving an interpersonal issue or taking care of something they had been putting off.
Some participants simply reported their intentions. Others also formed an implementation intention by specifying when and where they planned to act on the difficult project. The researchers then followed up after the holiday to find out whether the projects had actually been completed.
For the easy projects, making a specific plan did not make much difference. Most people managed to complete them anyway. The difficult projects were another story. Participants who had specified when and where they would act were considerably more likely to complete them than those who had formed the goal without making that additional plan.
The interesting part was that both groups already intended to complete the project. The implementation intention did not make one group suddenly care about the goal while the other group did not. What changed was the way the intention had been translated into action.
THE FINDING
This distinction between a goal intention and an implementation intention became central to Gollwitzer's work.
A goal intention specifies a desired outcome: I intend to exercise regularly. I want to finish my application. I am going to read more. It establishes what you want to accomplish, but it leaves the circumstances of actually doing it relatively open.
An implementation intention goes one step further by connecting a recognizable situation with a predetermined response. It generally takes the form "If situation X occurs, then I will perform behavior Y." The cue might be a particular time, place, event or circumstance. Instead of deciding that you will read more, you might decide that when you get into bed at night, you will read ten pages before opening anything on your phone.
This matters because wanting to do something does not guarantee that the right behavior will occur at the right moment. You still have to notice the opportunity, remember what you intended to do and choose the behavior when competing options are available. A specific plan does some of that work in advance.
THE THEORY
Gollwitzer's explanation for the effect is not simply that specific plans make us more organized. Forming an implementation intention appears to change the way we respond to the cue itself.
When you deliberately connect a particular situation with a particular action, the situation becomes easier to recognize as relevant to your goal. Research in this area also suggests that repeatedly linking the cue and response can make initiation of the planned behavior more immediate and efficient. Instead of encountering the situation and beginning a fresh round of deliberation, the situation itself can prompt the response you selected earlier.
This is useful because many everyday goals fail in very ordinary moments. You intended to go for a run after work, but when work ends you begin deciding whether you're too tired, whether tomorrow would be better and whether you have enough time. You intended to work on your business idea, but Saturday morning arrives and you first need to decide what to work on, where to do it and whether something else is more urgent.
None of these decisions is particularly significant on its own. The problem is that each one creates another opportunity for the intended behavior to be delayed or replaced.
An implementation intention moves some of those decisions to an earlier moment, when you are thinking about the goal rather than responding to whatever feels easiest in the situation itself.
NOT THE SAME THING
Implementation intentions are not just detailed goals
A goal can be extremely specific without being an implementation intention. Lose ten pounds by June, save $10,000 this year or finish the first draft by October 1 all describe relatively clear outcomes, but they don't necessarily tell you what to do when a particular opportunity to act appears.
Implementation intentions are about the link between a cue and a behavior. The important part is not adding more detail for the sake of detail. It is deciding what you will do when a recognizable situation occurs.
They also aren't a substitute for wanting the underlying goal. If you have no real commitment to learning French, creating an elaborate schedule for studying French is unlikely to manufacture that commitment. Implementation intentions are primarily designed to help with a different problem: you already want to do something, but your actions aren't consistently following the intention.
This distinction helps explain why the technique is relevant to goals we repeatedly describe as things we "keep meaning to do." The intention exists. What is missing is a reliable bridge between the intention and the moment when action needs to happen.
WHY IT MATTERS
A large amount of self-improvement advice focuses on strengthening motivation. If you aren't doing something consistently, the assumption is often that you don't want it badly enough, aren't disciplined enough or haven't found a sufficiently compelling goal.
Sometimes that is true. Sometimes the goal genuinely isn't important enough to us.
But implementation-intention research identifies a much more mundane reason that good intentions fail: we haven't decided what the intention should look like in real life.
"I want to see my friends more" may be completely sincere, but it doesn't tell you when to contact anyone. "I want to save more money" doesn't determine what happens when your salary arrives. "I want to write" doesn't tell you what happens on Wednesday evening when you have two free hours and several other things competing for your attention.
A useful plan turns an abstract intention into something that can be recognized in the environment. When I get paid, I transfer $200 to savings. When I make coffee on Saturday morning, I text someone I haven't seen recently. When I finish dinner on Wednesday, I work on the draft for one hour.
The larger body of research on implementation intentions now extends far beyond those early studies. Gollwitzer's publication record includes applications involving health behavior, academic performance, habits, group decisions and other forms of goal pursuit, and later meta-analytic work has examined hundreds of tests of implementation intentions.
The broader point is not that every part of life needs to be reduced to an if-then rule. It is that motivation and execution are different problems. Knowing what you want to do does not necessarily mean you have created good conditions for actually doing it.
TRY THIS
Choose one thing you genuinely intend to do but have been inconsistent about. Rather than making the goal more ambitious, identify a situation that reliably occurs and could serve as the cue for action. It might be a time of day, a place you regularly enter, something you already do or an event that naturally creates an opportunity.
Then decide what you will do when that situation occurs. When I close my laptop at the end of the workday, I will put on my walking shoes and go outside for twenty minutes. When I sit down on the train in the morning, I will read my book instead of opening social media. When my salary arrives, I will immediately transfer a set amount into savings.
The point is not to create a perfect schedule. It is to remove one decision from the moment when the behavior needs to happen.
You already decided what you wanted to do. An implementation intention decides when that intention becomes an action.
References
Gollwitzer, P. M. (1999). Implementation intentions: Strong effects of simple plans. American Psychologist, 54(7), 493-503.
Gollwitzer, P. M., & Brandstätter, V. (1997). Implementation intentions and effective goal pursuit. Journal of Personality and Social Psychology, 73(1), 186-199.
Gollwitzer, P. M., & Sheeran, P. (2006). Implementation intentions and goal achievement: A meta-analysis of effects and processes. Advances in Experimental Social Psychology, 38, 69-119.