This video explores the concept of decision fatigue, using a study on judges' parole decisions to illustrate how cognitive exhaustion can impact decision-making. It discusses the factors that contribute to decision fatigue and offers insights into managing cognitive energy to make smarter choices.

In a 2011 study, researchers followed a group of judges deciding whether or not to offer imprisoned individuals a chance at parole. Logically, one might expect things like the imprisoned person's crime, existing sentence, and current behavior to be the primary considerations. But while those details were duly examined, one variable had a remarkably large impact – the time of day. Imprisoned people who met with the board in the morning were far more likely to receive parole than those whose cases were reviewed in the afternoon, even if their crimes and sentences were practically identical. This finding might seem strange, but the researchers' explanation was simple. In the afternoon, the judges were likely exhausted. Specifically, they were experiencing decision fatigue. This kind of cognitive exhaustion occurs after a period of extended decision-making, and it can make people more impulsive and less confident while making choices. The dangers of decision fatigue are clear in high-stakes scenarios like this study, but it can have a serious impact on our day-to-day lives as well. So what kinds of choices lead us to this state, and what can we do to fight fatigue? Everything our bodies do, whether physical or mental, uses energy. But while it's unclear exactly what resources are depleted during mental strain, studies have found many individuals seem to have a daily threshold for making decisions. And once that threshold is met, most people make the conscious choice to take it easy and save serious thinking about any new decisions for another day. How quickly you reach this threshold depends on several variables, including the frequency, complexity, and novelty of the decisions you have to make. For example, choosing what to eat for breakfast isn't very taxing. Not only is this decision limited by what's available, it's also a choice you expect to make once a day, with fairly low stakes. And even when you're not quite sure what to eat, the time between this minor decision and the next one should give you ample room to recover whatever cognitive energy you expend. But let's imagine something much trickier. For example, your car suddenly breaks down, and you need to replace it right away. This is an unexpected, complicated decision with serious consequences. In this case, there are countless options to choose from.