The question
What is missing between deciding and doing?
A person decides that tomorrow they will send an important application. They review what is required, choose a time and feel relieved that the task is no longer undecided.
The next evening, the application remains unsent.
It is tempting to reinterpret the earlier decision as false. If the person had genuinely intended to act, surely they would have acted.
But the intention may have been real. It may have directed attention toward the future and prompted some preparation. The relief of deciding did not cause the later non-action. It simply accompanied a decision that had not yet been executed.
Deciding and doing are related events. They are not the same event.
This Essay concerns actions preceded by an intention. It does not claim that every action begins with a conscious decision. People also act habitually, spontaneously or in direct response to their surroundings.
An Intention Represents Future Action
Someone can view an action favourably without intending to perform it. They can want an outcome without committing to the behaviour required to pursue it. They can form a goal without specifying when or how to act.
An intention is a stated or represented readiness, decision or commitment directed toward future behaviour. Intentions vary in strength, specificity and stability.
A plan adds another layer by representing when, where or how the behaviour might occur. Action begins only when the person performs an observable response.
Someone may believe exercise is beneficial, desire better health, intend to train tomorrow and plan to visit the gym after work. None of those states is the training session itself.
This does not make intention irrelevant or merely verbal. Intention can organise attention, preparation and planning. It can make later action more likely.
It is also difficult to measure perfectly. When someone says, "I intend to do this," the statement provides evidence of intention. It does not establish with certainty how strongly committed they are, whether the intention will remain stable or whether they are describing an aspiration rather than a selected action.
Later non-performance cannot settle those questions retrospectively. Some stated intentions may be weak, unstable or socially convenient. A genuine intention can also fail to become action.
Intention Changes Probability, Not Certainty
People who intend to perform a behaviour are generally more likely to perform it than people who do not.
Experimental evidence supports a causal contribution from changing intention, although interventions may also change related processes such as confidence or planning. Across experimental studies, interventions changed intention more strongly than they changed behaviour.
This rejects two extremes.
Intention is not powerless. Changing it can change what people do.
Intention is also not self-executing. A stronger decision does not produce an equivalent or guaranteed change in behaviour.
The size of the gap varies across actions and settings. In one physical-activity meta-analysis, approximately 47.6% of participants classified as intenders did not meet the specified activity criterion. That estimate applies to the included physical-activity studies and depends on their definitions, thresholds and time frames. It is not the rate at which all human intentions fail.
Before non-action is classified as failed execution, another question must be asked: did the intention remain active?
A person may intend to act on Monday and revise that decision by Friday. New information may appear. Costs may change. Another goal may become more important. The original action may no longer seem appropriate.
That is different from maintaining an intention and failing to enact it.
Stable intentions are more consistently associated with later behaviour. Stability does not mechanically produce action, and reconsideration does not necessarily reflect weak character. It establishes whether the same intended future still exists when the opportunity to act arrives.
If it does, the intention must still become available at the right moment.
The Intention Must Return at the Right Moment
Some intended actions can be performed immediately. Others have to be remembered later.
A person decides in the evening to send a document when they arrive at work. The following day they become occupied with other tasks and remember the document only while travelling home.
If the intention remained in place, retrieving it at the relevant moment was still a separate requirement.
Remembering to perform a previously intended future action is called prospective memory. The relevant moment may be connected to a time, such as calling at three o'clock, or to an event, such as sending a message when a particular person arrives.
Reminders and external aids can help. A calendar alert can return an intention to attention. A visible cue can make the intended response easier to retrieve.
But remembering is not execution.
A reminder may appear when the person lacks time, access or the necessary resources. Another action may have legitimate priority. The person may remember exactly what they intended and still not begin.
Remembering solves one possible gap. Other conditions remain.
Opportunity Must Become Practically Available
A person intends to attend an appointment. They remember it and remain committed, but their transport becomes unavailable. No usable alternative can get them there within the available time and resources.
The non-attendance does not demonstrate weak intention. The required opportunity did not become practicable.
An option can exist in theory without being executable in the situation that occurs. Action may depend on access, time, equipment, permission, money, safety or another person's cooperation.
Opportunity also has to be recognised. A suitable moment may occur without the person detecting that it permits the intended response.
Perceived and actual opportunity can differ. Someone may overlook an available route. They may also believe an option is available when an essential resource is missing. Sometimes the restriction is as real as it appears.
Intention cannot substitute for unavailable conditions.
Even when an opportunity exists, however, it is rarely the only possible use of attention and action.
More Than One Goal Is Active
A person remembers an intended administrative task and has the necessary materials. Another activity offers a more immediate reward and receives priority.
The earlier intention may remain real. It simply does not determine action by itself.
At any moment, several responses may be available. A familiar setting can cue an established habit. An interruption can redirect attention. Another goal can become urgent.
Not every displacement is irrational. A parent may postpone a planned task when their child needs help. A worker may change direction when an urgent problem appears. The relevant priorities have changed.
The intended response must gain enough priority when action is possible. Sometimes it does. Sometimes another response becomes more urgent, salient or rewarding.
That establishes response competition as one possible source of the intention–action gap. It does not, by itself, explain procrastination or reveal why a particular alternative won.
Even when the intended action is remembered, possible and prioritised, a start may still be obstructed by the demands built into the action.
Remembering and Wanting May Still Not Produce a Start
A person intends to complete an online form. They remember it and have time available.
Beginning requires locating several documents, creating an account and interpreting unclear instructions. These demands can obstruct initiation even though the action appears formally available.
The word "friction" is useful only if the actual demand is identified. In this case, the relevant burdens include missing documents, multiple steps and uncertainty about what to do first.
Initiation may also depend on current attention, energy, skill and resources. A task that is manageable under one set of conditions may be harder to enter under another.
The non-start does not prove which demand was decisive. Nor does every unstarted task exceed a person's capacity. The point is that intending, remembering and having some opportunity do not perform the transition into action.
Changing the process can alter behaviour without strengthening intention. Providing the required documents, clarifying the first observable step or removing an unnecessary registration requirement may help.
Not all friction should be removed. Verification can protect security. Deliberate waiting can support reflection. Consent procedures can protect choice and accuracy. The question is whether the effort serves a necessary purpose or obstructs action without sufficient benefit.
Beginning is one transition. Continuing and completing create further demands.
Starting, Continuing and Completing Are Different
Two people can intend the same task and both fail to complete it for different reasons.
One never begins.
The other begins but stops when the task becomes more complicated than expected.
The visible result is the same: the task remains incomplete. The process is different.
Initiation concerns beginning. Persistence concerns continuing after action has started. Resumption concerns returning after interruption. Completion means reaching the defined endpoint.
These stages are analytically useful, even though real behaviour does not always divide into clean, observable phases.
A clear cue may help someone begin but do little when the challenge is maintaining behaviour over several weeks. A simplified first step may solve initiation while leaving later complexity unchanged. Support for continuation may be unnecessary when forgetting was the only barrier.
Stopping is also not always failure. Someone may begin, receive new information and decide that continuing is unwise. The decision has changed because the situation has changed.
Non-completion alone does not reveal where or why the sequence changed.
The appropriate support depends on the missing transition.
Plans and Cues Bridge Some Gaps
One well-supported structure links a particular situation with a particular response:
If situation X occurs, then I will perform action Y.
This is called an implementation intention.
Instead of merely deciding to exercise, someone might decide: "If I finish work on Tuesday, I will change clothes and walk for twenty minutes before going home."
Meta-analyses show that implementation intentions improve goal attainment on average, while effects vary across behaviours, populations and study designs. Larger effects have been associated with contingent if–then formats, existing motivation and rehearsal.
This makes implementation intentions useful, not universal.
Different gaps require different supports.
If an intention is forgotten, a reminder may help. If the relevant moment is not recognised, a specific cue may help. If the first action is unclear, defining an observable first step may help. If materials are unavailable, preparing them in advance may help. If unnecessary steps obstruct initiation, simplifying the path may help.
A reminder does not create transport. A plan does not provide missing skill. An if–then plan may fail when the anticipated cue never occurs. More planning may add burden when the next action is already clear.
A cue that helps someone begin may also do little for a problem with persistence.
Plans, reminders and cues increase the probability of action when they address the actual missing transition. None guarantees execution.
Find What Is Missing Between Decision and Action
When an intended action does not occur, repeating the decision more forcefully may solve nothing.
A more precise inquiry has five parts.
First, is the intention still active, or has the decision changed?
Second, will the intention be remembered when action becomes relevant?
Third, will the action be practically possible with the available resources?
Fourth, what other response may receive priority?
Fifth, is the difficulty in starting, continuing or completing — and what support fits that stage?
A reminder fits forgetting. A cue can help identify the moment for action. Preparing resources can make an opportunity executable. Clarifying the first step can reduce initiation demand. Support for persistence must extend beyond the first action.
Non-action does not tell us, by itself, whether the intention was weak, forgotten, blocked, displaced, reconsidered or never translated into initiation.
Intention matters because it directs behaviour toward a possible future. It remains distinct from the behaviour required to create that future.
Better follow-through begins by identifying what is missing between deciding and doing — not by assuming that the original intention was false or simply demanding more willpower.