Self-control Exertion Research Articles

Hold your strength! Motivation, attention, and emotion as potential psychological mediators between cognitive and physical self-control.

The process model of self-control posits motivation, emotion, and attention as psychological mediators in the relationship between cognitive and physical self-control. However, this model has never been tested in a sport context. Participants (N=69) completed 2 isometric biceps endurance trials (physical self-control task; T1 and T2), separated by a 6-min cognitive manip-ulation of self-control. Motivation and emotion were assessed before the respective biceps task, and attention was assessed in terms of gaze behavior on task-relevant in comparison with task-irrelevant stimuli during the biceps task (T1 and T2). To test the hypothesis that motivation, emotion, and attention mediated the relationship between cognitive and physical self-control, aparallel multiple mediator model was calculated. The results indicate that motivation, emotion,and attention (relative change between T1 and T2) did not mediate the relationship between cognitive and physical self-control (b=-0.01, 95% bias corrected and accelerated [BCa]confidence interval [-0.06, 0.03]) and that the exertion of cognitive self-control did not necessarily lead to impaired performance. Future studies should investigate the role of task demands and other potential mediators of self-control (e.g., belief about a limited willpower). Keywords:self-regulation, process model, psychological mediators, sports, mediation model

I'm tired and feel like drinking: Viewing alcohol cues after exerting self-control increases approach motivation among individuals lower in alcohol sensitivity.

Exerting self-control depletes capacity for future self-control, which can promote greater alcohol use. However, certain populations may be more susceptible to these effects of depleted self-control capacity. For example, individuals with lower alcohol sensitivity (i.e., requiring more drinks to experience the effects of alcohol) are a high-risk group who are likely to engage in hazardous alcohol use and develop an alcohol use disorder. Those lower in alcohol sensitivity also exhibit heightened motivational reactivity in response to alcohol-related cues, which may be enhanced following exertion of self-control. However, whether drinkers lower in alcohol sensitivity are at higher risk for exhibiting greater motivations toward alcohol-related cues after exerting self-control is unclear. The current research examined the role of alcohol sensitivity in predicting approach motivation following exertion of self-control. It was expected drinkers exerting self-control would exhibit greater orientation toward rewarding cues, particularly after viewing alcohol-related cues. However, we predicted this pattern would be most prominent among drinkers lower in alcohol sensitivity. Experiment 1 supported these hypotheses, with lower alcohol sensitivity predicting greater approach motivation among drinkers required to exert self-control prior to viewing alcohol-related compared to neutral cues. Experiment 2 aimed to replicate these findings by assessing asymmetrical frontal cortical activation, an index of approach motivation. Drinkers with lower alcohol sensitivity exhibited greater relative left frontal cortical activation, consistent with approach motivation, while viewing alcohol-related cues following exertion of self-control. Results have implications for interventions aimed at identifying those at risk for greater alcohol motivations during states of mental exhaustion. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

The Effects of Self-Control on Glucose Utilization in a Hyperinsulinemic Euglycemic Glucose Clamp

Abstract. Background. The glucose hypothesis of self-control posits that acts of self-control may draw upon glucose as a source of energy, leading to a decrease in blood glucose levels after exerting self-control, mirroring the temporary depletion of self-control, but supporting evidence is mixed and inconclusive. This might partly be due to using methods that are not suitable to reliably quantify glucose utilization. Aims. We aimed at examining whether self-control exertion leads to an increase in glucose utilization. Method. In a sample of N = 30 healthy participants (50% women, age 26.5 ± 3.5 years) we combined a hyperinsulinemic euglycemic glucose clamp (a well-established and validated procedure in experimental endocrinology to reliably quantify systemic glucose utilization) with a standard self-control dual-task paradigm. In the first task, the experimental group completed a variation of a paper-and-pencil crossing out letter task (COLT) that demanded self-control; the control group completed a variation of the COLT that did not demand self-control. The second task for both groups was a computerized two-color word Stroop which demanded self-control. Results. We did not find a significant main effect for time, nor a time × group interaction with respect to glucose utilization, which indicates that glucose utilization did not differ significantly over time or between groups. Limitations. Due to the time-consuming and complicated clamp method, our sample was rather small. Conclusion. Our results revealed little evidence for the notion that self-control efforts are associated with a relevant increase in peripheral glucose utilization.

Intense Self-Regulatory Effort Increases Need for Conservation and Reduces Attractiveness of Energy-Requiring Rewards

Abstract. Exertion of self-control produces distinct motivational consequences: the motivation to conserve energy and the motivation to seek rewards. We propose that heightened conservation inhibits reward-seeking, but only when the pursuit of the reward entails substantial energy expenditure. In two studies, we manipulated self-regulatory effort and then had participants engage in an additional task that was either easy or difficult. In Study 1, we found that self-regulatory effort tended to heighten reward-sensitivity but only when the subsequent task was easy. In Study 2, we measured pupil dilation to assess reward sensitivity while participants viewed images of rewarding stimuli. When the need to conserve was intense, we observed reduced pupil dilation for rewards that were energy-requiring but not for those that were energy-giving.

Protecting an important goal: When prior self-control increases motivation for active goal pursuit

The recent debate in the study of ego depletion casts doubt on the assumption that self-control has a limited capacity. Adopting a revisionist perspective, we assume that people manage self-control exertion efficiently and ask what psychological mechanism would counteract motivational withdrawal following initial exertion in order to sustain an important goal pursuit. We predicted and found that prior self-control increased students' motivation for active pursuit of the academic goal. In Study 1, prior self-control reduced students' behavioral intentions for school work and non-academic activities alike when academic pursuit was not activated. Under active pursuit of the academic goal, however, prior self-control uniquely increased students' intentions for school work. In Study 2, this facilitatory effect of prior self-control on behavioral intention toward an academic goal was replicated and accompanied by positive implicit attitudes toward study-related stimuli. In Study 3, when preparing to pursue the academic goal, prior self-control increased students' tendency to proactively remove a temptation from the immediate context (leave their phone with the experimenter) to support better task performance. Our investigation illustrates the importance of examining not only the debilitating but also the potentially facilitatory effect of prior self-control exertion.

Task duration and task order do not matter: no effect on self-control performance.

The strength model of self-control proposes that all acts of self-control are energized by one global limited resource that becomes temporarily depleted by a primary self-control task, leading to impaired self-control performance in secondary self-control tasks. However, failed replications have cast doubt on the existence of this so-called ego depletion effect. Here, we investigated between-task (i.e., variation in self-control tasks) and within-task variation (i.e., task duration) as possible explanations for the conflicting literature on ego depletion effects. In a high-powered experiment (N = 709 participants), we used two established self-control tasks (Stroop task, transcription task) to test how variations in the duration of primary and secondary self-control tasks (2, 4, 8, or 16min per task) affect the occurrence of an ego depletion effect (i.e., impaired performance in the secondary task). In line with the ego depletion hypothesis, subjects perceived longer lasting secondary tasks as more self-control demanding. Contrary to the ego depletion hypothesis, however, performance did neither suffer from prior self-control exertion, nor as a function of task duration. If anything, performance tended to improve when the primary self-control task lasted longer. These effects did not differ between the two self-control tasks, suggesting that the observed null findings were independent of task type.

The Effect of Preceding Self-Control on Prosocial Behaviors: The Moderating Role of Awe.

The exertion of self-control is known to result in subsequent detrimental effects on prosocial behaviors. Moreover, certain studies have demonstrated that positive emotions could drive people to allocate more attentional resources for conducting prosocial behaviors. However, whether and how awe – one important type of positive incidental emotion – moderates the effect of exerting self-control on subsequent prosocial behaviors remains unclear yet. The anonymous economic dictator game is an effective index of prosocial behaviors. We examined the influence of exerting self-control on prosocial behavior and the moderating role of awe on the effect of exerting self-control on prosocial behaviors in two experiments (N = 280). We adopted the incongruent Stroop task to induce the exertion of self-control and participants were required to allocate money to others in the anonymous dictator game (Experiment 1). We used the narrative recall task paradigm to elicit the emotion of awe during the interval between Stroop tasks and the dictator game (Experiment 2). Results indicated that the exertion of self-control was detrimental to prosocial behaviors and awe weakened the detrimental effects of exerting self-control on prosocial behavior. We interpreted these results in terms of the protective inhibition of self-regulation and motivation (PRISM) model.

Recruitment of cognitive control regions during effortful self-control is associated with altered brain activity in control and reward systems in dieters during subsequent exposure to food commercials.

Engaging in effortful self-control can sometimes impair people’s ability to resist subsequent temptations. Existing research has shown that when chronic dieters’ self-regulatory capacity is challenged by prior exertion of effort, they demonstrate disinhibited eating and altered patterns of brain activity when exposed to food cues. However, the relationship between brain activity during self-control exertion and subsequent food cue exposure remains unclear. In the present study, we investigated whether individual differences in recruitment of cognitive control regions during a difficult response inhibition task are associated with a failure to regulate neural responses to rewarding food cues in a subsequent task in a cohort of 27 female dieters. During self-control exertion, participants recruited regions commonly associated with inhibitory control, including dorsolateral prefrontal cortex (DLPFC). Those dieters with higher DLPFC activity during the initial self-control task showed an altered balance of food cue elicited activity in regions associated with reward and self-control, namely: greater reward-related activity and less recruitment of the frontoparietal control network. These findings suggest that some dieters may be more susceptible to the effects of self-control exertion than others and, whether due to limited capacity or changes in motivation, these dieters subsequently fail to engage control regions that may otherwise modulate activity associated with craving and reward.

The self-regulatory power of environmental lighting: The effect of illuminance and correlated color temperature

Ambient lighting—in particular, its brightness—is known to affect cognitive activation and self-control, but research on lighting has reported mixed effects. Some studies have shown that brightness increases cognitive activation, whereas others have shown that darkness prompts cognitive activation. In this research, we attempted to reconcile those inconsistent findings by investigating how lighting's effects on cognition are affected by fluency—the subjective experience of ease of processing information. We propose that the interaction between the brightness and the correlated color temperature (i.e., the warmth or coolness) of ambient lighting can make it either fluent, promoting cognitive activation, or disfluent, diminishing cognitive resources. Because self-controlled behaviors reflect the willful suppression of automatic responses, the exertion of self-control requires greater cognitive activation. Our results replicated prior findings on brightness by showing that warm bright light improved participants' self-control; however, that effect extended to cool dim lighting conditions as well. By contrast, self-control was weakened under cool bright lighting and warm dim lighting. Our results from four experiments demonstrate that those lighting conditions induce disfluency, leading to cognitive depletion and, consequently, lower self-control.

After-effects of self-control: The reward responsivity hypothesis.

Exercising self-control can be phenomenologically aversive. Insofar as individuals strive to maintain a positive emotional state, one consequence of exercising self-control may thus be a temporarily tuning toward or amplification of reward-related impulses (perhaps arising to countermand the aversive feelings that stem from self-control). Reward-relevant after-effects are relatively underappreciated in self-control research. In the current paper, we review theory and research pertaining to the idea that exercising self-control increases reward responsivity. First, we review theoretical models of self-control focusing on the relationship between control systems and reward systems. Second, we review behavioral studies regarding the effects of exercising self-control on subsequent reactivity to food, money, drugs, and positive emotional images. Third, we review findings from functional neuroimaging and electroencephalographic research pertaining to the reward responsivity hypothesis. We then call for additional research to integrate how, when, and under what circumstances self-control exertion influences reward processing. Such an endeavor will help to advance research and theory on self-control by offering a more precise characterization of the dynamic interactions between control systems and reward systems.

Can faith move mountains? How implicit theories about willpower moderate the adverse effect of daily emotional dissonance on ego-depletion at work and its spillover to the home-domain

ABSTRACTRecent findings have demonstrated that implicit theories about willpower (the belief whether willpower relies on a limited vs. nonlimited resource) moderate the ego-depletion-effect. This study examines this moderating mechanism in occupational settings where employees increasingly have to deal with the unpleasant state of emotional dissonance, which requires the exertion of volitional self-control. By integrating findings on implicit theories about willpower, arguments brought up by the strength model of self-control, and notions from the spillover literature, we propose that believing in a nonlimited resource theory of willpower buffers the effect of emotional dissonance on ego-depletion at work and diminishes the spillover of ego-depletion from the work- to the home-domain. In a diary study covering 10 working days (N = 71), we examine a moderated mediation model in which ego-depletion at work mediates the relation between emotional dissonance and ego-depletion at home and analyse whether implicit theories about willpower moderate both paths (a and b) of the proposed mediation model. Our results provide support for the mediation hypothesis and show that endorsing a nonlimited resource theory buffers the effect of emotional dissonance on ego-depletion at work, thereby disrupting the indirect effect of emotional dissonance on ego-depletion at home. Subsequently, we discuss implications of holding a nonlimited resource theory.

Self-Control Strength and Mindfulness in Physical Exercise Performance: Does a Short Mindfulness Induction Compensate for the Detrimental Ego Depletion Effect?

To meet specific goals, athletes frequently have to deal with several demands that may deplete their limited self-control resources, which may in turn negatively affect their subsequent performance in a wide variety of sports-related tasks (e.g., coordinative, psychological, and physical tasks). Mindfulness meditation may be beneficial for mechanisms involved during self-control exertion, because it supports efficient emotion regulation, attention regulation, and executive functioning. In our study, we investigated the effects of a short mindfulness exercise on physical performance in a state with temporarily depleted self-control strength (ego depletion). We applied a mixed between- (ego depletion: yes vs. no) and within- (two times of measurement, 7 days apart; mindfulness: yes vs. no; order counterbalanced) subjects design to test our hypothesis in a sample of 34 sport students. Ego depletion was manipulated via a well-established transcription task. For the manipulation of mindfulness, participants performed a 4-min mindfulness exercise via audio in the mindfulness condition and listened to an audiobook in the control condition. As a dependent variable, participants performed a previously validated strenuous physical exercise (plank exercise) for as long as possible, and we measured the relative difference between the baseline measurement and the second trial. We found no interaction effect, meaning that a short mindfulness exercise was not able to compensate for the detrimental ego depletion effect. In future studies, potential mechanisms should be assessed to reveal the ego depletion effect on physical exercise performance.Lay summary: In our study, we investigated the effects of a short mindfulness meditation exercise on physical performance (isometric plank exercise) in a state with temporarily depleted self-control strength (ego depletion). This short mindfulness exercise (breathing meditation) was not able to compensate for the detrimental ego depletion effect on physical exercise performance.

Mental Work Requires Physical Energy: Self-Control Is Neither Exception nor Exceptional.

The brain’s reliance on glucose as a primary fuel source is well established, but psychological models of cognitive processing that take energy supply into account remain uncommon. One exception is research on self-control depletion, where debate continues over a limited-resource model. This model argues that a transient reduction in self-control after the exertion of prior self-control is caused by the depletion of brain glucose, and that self-control processes are special, perhaps unique, in this regard. This model has been argued to be physiologically implausible in several recent reviews. This paper attempts to correct some inaccuracies that have occurred during debate over the physiological plausibility of this model. We contend that not only is such limitation of cognition by constraints on glucose supply plausible, it is well established in the neuroscience literature across several cognitive domains. Conversely, we argue that there is no evidence that self-control is special in regard to its metabolic cost. Mental processes require physical energy, and the body is limited in its ability to supply the brain with sufficient energy to fuel mental processes. This article reviews current findings in brain metabolism and seeks to resolve the current conflict in the field regarding the physiological plausibility of the self-control glucose-depletion hypothesis.

Attentional bias is more predictive of eating behavior after self-control exertion

There is experimental evidence to suggest that attentional bias to food stimuli may predict food intake. The process model of ego-depletion (Inzlicht & Schmeichel, 2012) proposes that after self-control exertion, attention shifts toward rewarding objects such as palatable food, which in turn should prompt greater food consumption as an indicator of lower self-control. In the current study, 84 female restrained and unrestrained eaters engaged in a self-control or neutral task, followed by a measure of attentional bias and an eating task. Results indicated there were no differences in attentional bias or amount eaten between self-control conditions and dietary restraint groups. However, a moderated regression showed that attentional bias toward food or self-control images predicted eating behavior only in participants who previously exerted self-control, while no effect was found for participants in the neutral condition. These results suggest that attentional bias may predict food intake, but only for individuals who have previously exerted self-control.

Prior self-control exertion and perceptions of pain and motivation during a physically effortful task.

Performing a task requiring self-control may impair performance on a subsequent physical task also requiring self-control. The mechanisms explaining why self-control is reduced following prior use currently remain unclear. This study, therefore, explored whether exerting self-control (a) reduces performance, (b) increases perceptions of pain, and (c) reduces motivation during a subsequent, unrelated physical task that requires self-control. In a within-subject design, 55 individuals completed an easy (congruent) Stroop task (no self-control) or a difficult (incongruent) Stroop task (self-control). Participants were then required to perform a lower limb endurance task (i.e., a "wall-sit") until volitional exhaustion and their perception of pain and motivation were recorded during the task. When participants completed the difficult Stroop task, wall-sit time to volitional exhaustion was reduced (133.33±70.28s) compared to when they completed the easy Stroop task (150.49±69.97s, P=0.04). Motivation during the early stages of the wall-sit task explained the reductions in performance (P<0.001). The results suggest that motivation to perform task goals may be an important explanatory mechanism behind performance decrements on physical tasks following the exertion of self-control.

Depletion, moral identity, and unethical behavior: Why people behave unethically after self-control exertion.

Self-control enables people to resist short-term temptations in the service of long-term goals. Previous exertion of self-control leads to a state of ego depletion. Three studies demonstrated that ego depletion leads to a high level of unethical behavior. These studies also hypothesized and confirmed that depleted individuals behave unethically because of low moral identity. Study 1 found that depleted participants were more likely to over-report their performance than non-depleted participants. Study 2 revealed that depletion reduced people's moral identity, which in turn increased their propensity to engage in unethical behavior. Study 3 proved that priming moral identity eliminated the effect of depletion on cheating. Findings suggest that reduced moral identity accounts for the effect of self-control depletion on unethical behavior.

Maternal fatty acids contribute to prenatal programming of temperament

Completion of a task requiring self-control may negatively impact on subsequent self-regulatory efforts. This study explored a) whether this effect occurs during a well-practiced endurance task, b) the potential for glucose supplementation to moderate this effect, and c) whether this effect differed over time.Fourteen trained cyclists completed four simulated 16 km time trials on an electromagnetically braked cycle ergometer. Prior to each time trial, participants completed a congruent Stroop task or an incongruent Stroop task that required self-control. They also received either a glucose-based drink or placebo. Participants' performance time and heart rate were recorded throughout the time trials.Multilevel growth curve analysis revealed a significant three-way interaction between self-control, glucose, and time (b = −0.91; p = 0.02). When participants did not exert self-control (congruent Stroop) or consume glucose (placebo drink) they were slowest during the early stages of the time trial but quickest over the full distance. No differences were found in heart rate across the four conditions.Findings suggest that pacing may explain why self-control exertion interferes with endurance performance. Moreover, the debate revolving around depletion of self-control must consider that any observed effects may be dependent on the timing of performance inspection.

More Is Meaningful: The Magnitude Effect in Intertemporal Choice Depends on Self-Control

Impulsivity is a variable behavioral trait that depends on numerous factors. For example, increasing the absolute magnitude of available choice options promotes farsighted decisions. We argue that this magnitude effect arises in part from differential exertion of self-control as the perceived importance of the choice increases. First, we demonstrated that frontal executive-control areas were more engaged for more difficult decisions and that this effect was enhanced for high-magnitude rewards. Second, we showed that increased hunger, which is associated with lower self-control, reduced the magnitude effect. Third, we tested an intervention designed to increase self-control and showed that it reduced the magnitude effect. Taken together, our findings challenge existing theories about the magnitude effect and suggest that visceral and cognitive factors affecting choice may do so by influencing self-control.

Exposure to nature counteracts aggression after depletion.

Acts of self-control are more likely to fail after previous exertion of self-control, known as the ego depletion effect. Research has shown that depleted participants behave more aggressively than non-depleted participants, especially after being provoked. Although exposure to nature (e.g., a walk in the park) has been predicted to replenish resources common to executive functioning and self-control, the extent to which exposure to nature may counteract the depletion effect on aggression has yet to be determined. The present study investigated the effects of exposure to nature on aggression following depletion. Aggression was measured by the intensity of noise blasts participants delivered to an ostensible opponent in a competition reaction-time task. As predicted, an interaction occurred between depletion and environmental manipulations for provoked aggression. Specifically, depleted participants behaved more aggressively in response to provocation than non-depleted participants in the urban condition. However, provoked aggression did not differ between depleted and non-depleted participants in the natural condition. Moreover, within the depletion condition, participants in the natural condition had lower levels of provoked aggression than participants in the urban condition. This study suggests that a brief period of nature exposure may restore self-control and help depleted people regain control over aggressive urges.

Prior self-control exertion and perceptions of pain during a physically demanding task

ObjectivesExertion of self-control has been associated with impaired performance on subsequent physical tasks also requiring self-control, but it remains unknown why this occurs. This study, therefore, explored whether a) prior self-control exertion reduces subsequent persistence on a physically demanding task, and b) whether any observed performance decrements could be explained by changes in perceptions of pain. MethodIn a within-subject design, sixty-three individuals completed an easy (congruent) Stroop task or a difficult (incongruent) Stroop task that required self-control. Participants were then required to remain in a physically demanding posture (i.e., a ‘wall-sit’) until voluntary exhaustion and their perception of pain was recorded during the task. ResultsWhen participants completed the difficult Stroop task, they quit the wall-sit sooner. This decrement in performance was explained by greater perceptions of pain at the beginning of the wall-sit. ConclusionsPerceptions of pain may, therefore, be an important attentional mechanism explaining why self-control use interferes with subsequent persistence during physically effortful tasks.