Before Temptation: What Self-Control Makes Important
This chapter focuses on the two routes through which self-control can shape a health intention before a person has to resist anything: valuation, which concerns how the action is appraised, and prioritization, which concerns which considerations carry weight. The distinction supports a precise judgment. Higher self-control may be associated with more favorable views of a health action, but it may also change the basis on which a person forms an intention. Those are different claims, and the study's evidence should not be compressed into the vague idea that self-control simply creates “better attitudes.”
Valuation: changing what the action means
A health behavior is never just a movement or a prohibition. It comes with expected consequences and expected feelings. Taking regular physical activity may seem worthwhile because it supports health, but it may also seem inconvenient or unpleasant. Limiting alcohol may seem important because of long-term consequences while feeling socially awkward in the short term. Eating a low-fat meal may seem beneficial but less enjoyable than an alternative. The valuation route asks whether self-control is related to these appraisals, and whether the appraisals help explain stronger intentions and later behavior.
The Reasoned Action Approach separates several parts of that valuation. Affective attitude concerns the immediate or experiential side of an action: enjoyable or unpleasant, pleasant or aversive. Cognitive attitude concerns instrumental consequences: worthwhile or pointless, important or unimportant, beneficial or costly. The distinction is not a choice between emotion and reason. Both can be relevant at once. A person can expect a run to feel difficult and still regard it as worthwhile; another can enjoy a food but not consider the choice beneficial. A health decision often contains a tension between these evaluations rather than one global attitude that points in a single direction.
Norms contribute another kind of appraisal. A descriptive norm is a belief about what people in a relevant group do. If a person thinks most friends regularly exercise, that perception may make exercise feel ordinary or expected. An injunctive norm is a belief about what important others approve of or think one should do. A family may encourage reduced drinking even if family members themselves drink frequently. These forms of social information can influence intention, but they describe different sources of meaning: what seems common and what seems approved.
Perceived behavioral control adds feasibility. It reflects how easy or difficult a person believes the behavior will be and how confident they feel about performing it. The same action can look desirable but hard. Someone may believe that walking after work would be worthwhile, yet doubt they can do it consistently because of commuting time, fatigue, weather, or an unpredictable schedule. Another person may feel fully capable but see little benefit in the action. A valuation account must therefore include both desirability and perceived ability, not treat motivation as sufficient.
In the multi-behavior study, self-control was associated with the RAA variables that feed intention. Formal mediation analyses were consistent with a pattern in which affective attitudes, cognitive attitudes, descriptive norms, and perceived behavioral control helped account for the relationship between self-control and behavioral intentions. Injunctive norms did not serve as a significant individual mediator in that test. The findings also supported mediation of the self-control–behavior relationship through intentions and perceived behavioral control, among other measured variables.
Here, mediation has a specific meaning. It does not simply say that two variables are correlated. It asks whether the relationship between an upstream variable and an outcome is statistically carried through an intermediate variable. If self-control is related to a stronger intention, and a more favorable cognitive attitude is also related to that intention, the mediation model asks how much of the self-control–intention association is consistent with that appraisal serving as an intermediate link. It does not prove that self-control experimentally changed the appraisal. The study measured self-control and the mediating variables at the same baseline time, followed behavior later, and still found a remaining direct association between self-control and intention in the simultaneous model. The measured appraisals therefore help explain the relationship without exhausting it.
This restraint matters in practice. Suppose a person rarely chooses physical activity because it feels unpleasant and seems difficult to fit into the day. A persuasive message about long-term health might change the cognitive attitude, while a more convenient setting might change perceived control. Those are different intervention targets. Neither result would justify saying that the person lacks character or that one change must solve the whole problem. The valuation route identifies what the action comes to mean and how achievable it appears; it does not guarantee that a favorable appraisal will survive competing influences.
A mediation result can still be informative without being a complete causal explanation. It tells us that the proposed intermediate variable fits the observed pattern well enough to deserve attention. It does not tell us whether changing that variable alone would produce the predicted behavior, whether an unmeasured factor shaped both variables, or whether the direction of influence could run partly the other way. For example, people who already perform a health behavior may come to see it as more worthwhile and more manageable. The study's longitudinal follow-up strengthens the connection to later behavior, but the simultaneous measurement of self-control and the baseline appraisals leaves important ordering questions open. Stronger evidence would include designs that manipulate appraisals or perceived control, separate self-control from the mediators in time, and test whether the resulting changes alter intention and behavior.
This is why the valuation route is best understood as a set of plausible, supported links rather than a prescription to make every health action feel pleasant. Some useful actions remain uncomfortable. Some people face constraints that a change in attitude cannot remove. An evidence-based account must preserve both possibilities: changing meaning and perceived feasibility may help, but the value of an intervention depends on which link is actually limiting action.
Prioritization: changing which reason wins
Valuation and prioritization can look similar because both concern the considerations behind an intention. The difference is between changing the level of a consideration and changing its weight in the decision. Valuation asks whether someone sees exercise as more worthwhile or feels more positively about it. Prioritization asks whether that evaluation, rather than a habit, an immediate feeling, or a social prescription, has more influence when the person forms an intention.
This is a moderation question. A moderator changes the strength of a relationship. In this case, the question is whether the association between a particular consideration and intention differs depending on a person's level of self-control. Imagine two people who both rate physical activity as worthwhile, believe they can perform it, and know that their friends approve. One may form an intention mainly because the health benefit seems important and the plan feels feasible. The other may be guided more by whether exercise fits the social routine or whether it feels enjoyable in the moment. Their average beliefs could be similar while the decision process gives different beliefs different influence. That is what prioritization is designed to capture.
The study found that higher self-control strengthened the association of cognitive attitudes with intentions. Instrumental consequences—whether an action is worthwhile or beneficial—carried more predictive weight at higher levels of self-control. Perceived behavioral control also had a stronger relationship with intention as self-control increased. In practical terms, feasibility was not merely present in the decision; it became more influential. A person with higher self-control may be more likely to ask whether a plan can actually be performed and whether its consequences serve a longer-term goal, rather than relying only on how the option feels immediately.
At the same time, higher self-control weakened the associations of injunctive norms and habits with intention. This does not mean that people with higher self-control disregard other people or never act from routine. It means that, in the reported intention model, perceived approval and established habit were less predictive of the intention when self-control was higher. Habit can still support behavior after a goal is formed, and the source found a separate route through which self-control related to beneficial habit formation. The weaker role of habit in intention formation should not be confused with the disappearance of habit from behavior.
The pattern also does not support a simple story in which reason always defeats emotion. The interaction between self-control and affective attitude was not significant in the intention model, and the interaction with descriptive norms was not significant there either. Cognitive attitudes and perceived behavioral control became stronger predictors; that is not the same as proving that feelings became irrelevant. Affective influence was examined again in the behavior model as part of the inhibition route, but the intention-stage result should be interpreted on its own terms.
The norm findings require particular caution. The study's interaction involving injunctive norms did not match an earlier proposal that self-control would increase the influence of injunctive norms while reducing the influence of descriptive norms. In the present results, injunctive norms became a weaker predictor of intention at higher self-control, while descriptive norms were not significantly moderated. The authors discuss possible reasons, including differences between measured trait self-control and experimentally manipulated states of self-control, and the possibility that higher self-control is associated with more autonomous reasons for acting. Those are interpretations, not a settled general theory of social influence.
The diagram separates two operations that are easy to blend together. Self-control can be associated with a more favorable appraisal of an action, which is the valuation idea. It can also be associated with a different relationship between that appraisal and intention, which is the prioritization idea. The arrows are a compact representation of the tested model, not a claim that a person consciously performs these steps in sequence or that self-control has one uniform effect on every consideration.
A concrete example helps. Suppose two people both know that reducing alcohol intake is beneficial and both believe they could do it. One forms an intention because the long-term health consequences and personal control feel decisive. The other forms an intention mainly because a partner has asked them to, even though the plan does not feel personally chosen. The two people may report similar intentions on a single question, but the reasons supporting those intentions are not equally stable under pressure. If the social request changes or the immediate occasion becomes more tempting, the intention may be more vulnerable when it rests on a consideration that no longer carries weight. The evidence does not prove that one motivational basis always succeeds; it shows why the basis of an intention is worth examining.
This also clarifies what the first study can and cannot tell us. Its results support a pattern of moderation across the measured health behaviors, but they do not show that high-self-control people use a conscious rule to ignore norms or habits. Nor do they establish that cognitive attitudes and perceived control are always better guides than affect or social information. Feasibility can be a useful corrective to wishful thinking, but a person may accurately perceive that a behavior is difficult because the environment is genuinely restrictive. An emphasis on utility can also become too narrow if it dismisses enjoyment, belonging, or cultural meaning. The study identifies relative predictive influence; it does not supply a universal ranking of human reasons.
The distinction between valuation and prioritization prepares a broader judgment about self-control. A healthful intention can be supported by what the action means and by why that meaning carries weight. Neither is yet a completed behavior. The person still has to establish a workable context, repeat the action, and translate the intention across days when the original reasons are less vivid. Those later processes are where the difference between an intention that sounds good and an intention that survives ordinary life becomes visible.