"By understanding your brain, you increase your capacity to change your brain."
- Your Brain at Work, page 96
"Despite thirty years of consistent findings about dual-task interference, many people still try to do several things at once. Workers of the world have been told to multitask for years."- Your Brain at Work, page 36
Making decisions and solving problems relies heavily on a region of the brain called the prefrontal cortex. There are five main mental processes relevant to getting work done: understanding, decision-making, recalling, memorizing, and inhibiting. Each process involves manipulations of billions of neurological circuits, and here’s the key: one operation must finish before another can begin. When engaged in conscious activities, the brain works in a serial pattern: one thing after another.
Hundreds of experiments demonstrate that when people do two cognitive tasks at once, their cognitive capacity can drop from that of a Harvard MBA to that of an eight-year-old. This phenomenon is referred to as “dual-task interference.” The myth of multi-tasking is that you are not really doing two cognitive tasks at the same time. Instead, you are switching attention between tasks very quickly, which drains essential brain energy and makes it even more difficult for you to accomplish either task.
Rock describes several strategies that can help you work more effectively than the myth of multi-tasking, including:
"Your best-quality thinking lasts for a limited time. The answer is not always just to ‘try harder.’"- Your Brain at Work, page 9
The prefrontal cortex requires a lot of metabolic fuel and goes through it very quickly, much like a gas-guzzling SUV. This means that if you make a complex decision, your brain depletes significant fuel and making yet another complex decision becomes much more difficult.
Think about the first thing you do on a Monday morning. If you’re a typical business professional, chances are you boot up your computer and start pounding away at emails. A better way to start the week is to close your office door, direct your phone to voicemail, and pull up a clean sheet of paper to determine your priorities and objectives.
Prioritization, or decision-making, requires significant brain fuel because it requires inhibition. Prioritizing means deciding what is important, but also means deciding what is not important and being careful not to get distracted by those non-critical tasks. Therefore, it’s important to prioritize when you have plenty of brain fuel. If you do prioritizing after an hour or two of emailing, it will take much longer and be more difficult to do.
"It’s helpful to become aware of your own mental energy needs and schedule accordingly."- Your Brain at Work, page 15
By understanding that certain mental processes require more brain energy than others, we can more effectively schedule our day to minimize energy usage and maximize performance. One technique is to break up work into blocks of time based on type of brain use rather than topic. For example, if you have creative writing to do for several projects, it might make more sense to schedule all of your creative writing for a Tuesday afternoon, as opposed to breaking it up according to when you’re scheduled to work on each project.
More often than not, we schedule by the calendar – according to a particular project, account, or client – not by task type. Worse yet, we let ourselves become consumed by continuous distractions, such as email, and respond to issues as they arise, even if they are non-urgent. We then become victims of multi-tasking, as we jump from task to task without considering the significant impact on our brain and subsequent results from our distracted efforts.
In order to discipline your brain and become more efficient with your time, it’s critical to create and adhere to a schedule that optimizes your brain activity. Try scheduling blocks of time for activities such as: deep thinking, meetings, and routine tasks.
In the 21st century workplace, we have more tasks to do, more information to absorb, and more distractions to deal with than ever before. It can be easy to become overwhelmed and fall into the trap of multi-tasking. What Rock’s findings about the brain teach us is that it’s far more effective to re-arrange the how (prioritization) and when (timing) of how we complete our tasks.
I have been interested in ‘what makes us tick’ since as early as I can remember, and my personal interest in brain research has been there since my teens.
