Eventually, the brain looks for shortcuts to circumvent decision fatigue, leading to poor decision-making. Decision fatigue causes the quality of our decisions to decline as we become mentally exhausted. Decision fatigue causes us to make poor decisions, because, as we reach mental exhaustion, our brains take illogical shortcuts to aid us in our decision-making.

These shortcuts result in less deliberate decisions. Another shortcut involves procrastinating the decision-making task. On a large scale, decision fatigue could impact decision-making at a high-level, and affect the choices taken by company executives, academic leaders, and politicians.

Globally, we regularly make choices and decisions that can impact the world. Systemically it is hard to address decision fatigue, as mental fatigue occurs for all us. Creative responses to tackle issues like decision fatigue and preventing burnout have included proposals for shorter workdays, or 4-day workweeks, as is being done in New Zealand.

Decision fatigue occurs due to the mental exhaustion we face from having to make too many decisions. The following factors can contribute to the development of decision fatigue. People who more frequently have to make decisions based on trade-offs experience decision fatigue more intensely.

As an example, those who live in poverty typically have to struggle with trade-offs continually. Dean Spears is an economist and researcher at Princeton University. In 20 different villages in Rajasthan, Spears offered individuals the option to buy bars of soap for the equivalent of fewer than 20 cents, a steep discount in comparison to the typical price.

Regardless of the cut, the dollar amount was still a straining factor for individuals, especially in the ten most impoverished villages. Additionally, the decision-making effort involved for the more impoverished participants took an amount of mental energy for them to verify if the trade-off was worth the cost.

Whether or not the individuals chose the deal and bought the soap, the consideration needed in making the decision left each person with less willpower which was measured later by researchers.

Researchers believe this was due to their socio-economic background, as they had more money and did not require to assess the trade-offs of buying soap as intensely as those with less money. Spears argued that this type of decision fatigue trapped people in poverty, as their financial situations forced them to make more trade-offs when making decisions.

The additional decision fatigue experienced by these individuals led to them having less willpower to devote to school work, careers, and other activities then help them achieve middle-class status.

The recommendation to never go grocery shopping while hungry has actual merit. The impact glucose levels have on decision fatigue was first accidentally discovered by a failed experiment at the Baumeister lab. The brain is better at avoiding decision fatigue when adequately supplied, deriving its energy from glucose, the sugar obtained from a wide variety of food.

The restored willpower people would then develop, would better their ability to self-control, and make decisions. We need to be mindful of decision fatigue, as it is both prevalent in our lives and can lead to bad decision making and burnout for many people.

Decision fatigue can also lead people to avoid making decisions all together, a phenomenon referred to as decision avoidance.

Decision fatigue can also influence how we impulsively purchase in both big and small ways. For example, when we are grocery shopping, we have to make many choices, especially regarding the trade-offs of buying certain items. If we chose to go grocery shopping with low glucose levels, our decision-making ability could especially be affected by decision fatigue.

For this reason, it is always advised to eat before buying purchases. Finally, decision fatigue can significantly impair our ability to self-regulate. Experiments have shown connections between decision fatigue and ego depletion, where the more choices we make, the higher the impact on our ability to self-control against impulses.

Researchers have identified different ways to reduce or eliminate decision fatigue in our decision-making process. Reducing necessary choices or decisions to make is a common technique used to curve the decision fatigue.

Famously, other prominent businessmen, such as Steve Jobs and Mark Zuckerberg, have also used this trick to eliminate unnecessary decision-making and focus on more relevant decisions. An example of habits we can set would include having strict bedtimes, and morning wake-ups, specific days and times to exercise, and specific days to do chores throughout the week.

As previously noted, glucose levels can impact our ability to make consistent decisions. Managing and maintaining blood sugar levels can be done by snacking throughout the day, or only making decisions after eating, which can help prevent decision fatigue.

To avoid decision fatigue, we can schedule work meetings and critical decision making at the beginning of the day to take advantage of this trait.

Finally, resting helps us to maintain balance and better make decisions. People who burnout and are continually making decisions and overwhelming their cognitive processes. By taking time-off on weekends or throughout the day, we can help reduce decision fatigue in our decision-making process.

The term decision fatigue was first documented by the social psychologist, Roy F. Baumeister, to describe the mental and emotional strain resulting from the burden of making choices.

The term decision fatigue also looks at the concept of ego depletion, first discussed by Freud. Freud theorized that our egos depend on mental activities, which involved the transfer of energy.

The experiments conducted by Baumeister demonstrated that mental energy is finite, especially regarding its impact on our self-control.

Baumeister noted that when we avoid temptations, such as eating chocolate chip cookies, we cannot resist other temptations. For example, Baumeister noted that study subjects gave up more quickly when asked to solve problems, such as working on a geometry puzzle when not indulging their primary temptations.

Certain prisoners in the justice system are given opportunities for parole throughout their sentence. Parole hearings, which occur between judges and prisoners, are typically assigned randomly throughout the day. Due to decision fatigue, the time of a parole appointment is particularly important, and an indicator of parole hearing results.

Prisoners with earlier parole hearings are more likely to be given parole than prisoners with afternoon hearings, due to judges suffering from decision fatigue by afternoon time.

The decision fatigue causes judges to choose the default option typical in parole hearings, which is to deny parole. The scenario described above has been tested through several experiments, including one study published in The Proceedings of the National Academy of Sciences PNAS examining parole procedures in an Israeli prison system.

The analysis follows three different men in the Israeli prison system and the decision of a parole board. All three prisoners in question had completed at least two-thirds of their sentences.

The order of the parole cases was as followed:. Case 1: Took place at a. and involved an Arab Israeli who was currently serving a month sentence in jail for fraud.

Case 2: Took place at p. and involved a Jewish Israeli who was currently serving a month sentence in jail for assault. Case 3: Took place at p. Of these three men, only the first prisoner was granted parole: the prisoner whose parole sentence was in the morning.

Even though case 1 and case 3 had similar prisoners serving the same sentence, the third prisoner did not receive parole.

In case 2, the prisoner had initially received a shorter sentence and was still not granted parole. The study authors concluded that the results occurred due to the timing of the appointments.

The above example is consistent with an over-arching pattern found within the prison parole process. After analyzing more than 1, parole decisions over a year, the journal found that timing was the primary indicator of parole approval.

Researchers Jonathan Levav of Stanford University, and Shai Danziger of Ben-Gurion University, state that this type of behavior is not unusual or malicious. As the day progresses decision fatigue influences the decision of the judges more. Another example of decision fatigue is exemplified by the experiment conducted by the postdoctoral fellow Jean Twenge at the Baumeister laboratory.

Twenge investigated the impact of decision fatigue and self-control on students when making decisions. For the first part of the experiment, Twenge retrieved an array of items from a department store that would appeal to college students. The researcher told participants they would be allowed to keep an item for themselves only after answering a series of questions.

Students made choices that involved choosing between the department stores items, such as choosing between keeping a pen or a candle, or between two different scented candles. The students had to make several decisions throughout the experiment process. The second group of students in this study was called non-deciders.

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Download references. This study was supported by Scientific Research Foundation of Hunan Provincial Department of Education, China Grant No. The authors thank Linfeng Yang and Shihao Zheng, undergraduate students of Industrial Engineering, Hunan Institute of Technology, for their assistance in this study.

Department of Industrial Management, National Taiwan University of Science and Technology, Taipei, , Taiwan. Department of Industrial Engineering and Engineering Management, National Tsing Hua University, Hsinchu, , Taiwan. You can also search for this author in PubMed Google Scholar. designed the research, performed the experiment, and collected the data.

and E. analyzed the data, interpreted the results, and prepared the manuscript including the figures, tables, analytic tools, and organizational structure of the manuscript.

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Subjects Human behaviour Psychology. Abstract Mental fatigue is a common phenomenon in modern people, especially after a long period of mental work.

Methods Participants Forty-two Han Chinese students were recruited from the Hunan Institute of Technology, and two participants were excluded due to excessive artifacts in their EEG recordings.

Full size table. Figure 1. AX-CPT paradigm. Full size image. Figure 2. Single outcome gambling task. Results Subjective ratings The mean score on the mental symptom subscale of the Fatigue Scale was 4.

Behavioral results Decision time Table 2 shows the behavioral results and risk choices of the two groups. Table 2 Behavioral results and risk preference.

Figure 3. Table 3 Mixed-model ANOVA results. Table 4 Correlation analysis results. Discussion The primary purpose of this study was to investigate whether mental fatigue affects risk decision-making, which we intended to measure with both behavioral and brain activities.

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Article PubMed Google Scholar Download references. Acknowledgements This study was supported by Scientific Research Foundation of Hunan Provincial Department of Education, China Grant No. View author publications. Ethics declarations Competing interests The authors declare no competing interests.

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