Study Hacks Blog

As longtime readers know, I’m a big advocate of time blocking as a productivity method. Running your day from a to-do list (or, God forbid, an email inbox) leads to sub-optimal returns on the energy invested. The superior method is to give every minute of your workday a job by actually blocking off your time and assigning specific work to the blocks. In my experience, a serious commitment to time blocking can roughly double your results. (For more details, see this article or Rule #4 of Deep Work.)

Anyway, this is all to say that I was excited when several readers pointed me toward a nice variation of time blocking implemented by Jeff Huang, a computer science professor at Brown University.

As detailed in a post he wrote about his method, Huang uses a plain text file to make his time block plan for the day. (Though I use a paper notebook for my time blocks, I too appreciate the versatility of plain text files.)

Here’s an example schedule provided by Huang:

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Today is March 14th, which to us math nerds is also known as Pi Day, in reference to the first three significant digits of the mathematical constant pi (3.14).

Part of what makes pi interesting is that it’s one of the most famous irrational numbers, meaning that it cannot be expressed as the fraction of two whole values (though 22/7 comes pretty close). In honor of Pi Day, I thought I would learn more about the history of irrational numbers, so I turned to one of my bookshelf favorites, The World of Mathematics: a four-volume history of math, edited by James R. Newman, and published in a handsome faux-leather box set in 1956. (I picked up my copy at a used book sale five years ago.)

The first volume contains an extended essay (originally a short book) titled “The Great Mathematicians,” written by Herbert Western Turnbull, the late Scottish algebraist. Turnbull dedicates much of the essay to great innovations from ancient Greek mathematics. It was Pythagoras (570 – 495 BC), he notes, who is most often credited for discovering that irrational numbers exist.

We know something of the proof that Pythagoras used due to a later account by Aristotle. The proof is elementary by modern standards (indeed, it’s a common example in undergraduate-level discrete mathematics courses). It goes something like this…

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Last week, I wrote about a paper appearing in the American Economic Review that conducted a randomized trial to measure the personal impact of deactivating Facebook. A few days later, a different study was published, this one appearing in the journal Computers in Human Behavior, that also deployed a randomized trial to measure the impact of reduced Facebook use.

The authors of this new paper, a group of psychologists from Ruhr-Universität Bochum, in Germany, randomly split a group of roughly three hundred volunteers into an experiment and control group. The participants in the experiment group were asked to reduce their daily Facebook use, while the control group made no changes.

Personal impacts were measured with online surveys administered at regular intervals. To summarize the paper’s main findings:

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In the most recent issue of the prestigious American Economic Review, a group of well-known economists published a paper titled “The Welfare Effects of Social Media.” It presents the results of one of the largest randomized trials ever conducted to directly measure the personal impact of deactivating Facebook.

The experimental design is straightforward. Using Facebook ads, the researchers recruited 2,743 users who were willing to leave Facebook for one month in exchange for a cash reward. They then randomly divided these users into a Treatment group, that followed through with the deactivation, and a Control group, that was asked to keep using the platform. 

The researchers deployed surveys, emails, text messages, and monitoring software to measure both the subjective well-being and behavior of both groups, both during and after the experiment. 

Here are some highlights of what they found:

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Sir William Osler is one of the most important figures in the founding of modern medicine. In 1910, he published a book titled Aequanimitas: With Other Addresses to Medical Students, Nurses and Practitioners of Medicine. It builds on a farewell address he gave at the Pennsylvania School of Medicine in 1889, and details his thoughts on what it takes to thrive in an intellectually demanding medical field.

As one of my readers helpfully pointed out recently, chapter 18 of this book contains the following prescriptive gem about how to succeed in an endeavor that requires you to create value with your mind:

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