Here's the slide deck [PDF] from a Michael Dearing presentation called "The Five Cognitive Distortions of People Who Get Stuff Done." As Kottke points out, a lot of context is missing, but what's there is fascinating -- an enumeration of the blind spots of "people who get extraordinary stuff done in Silicon Valley," based on interviews with 4,515 founders from 2,481 companies.
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Time is relative. Remember how each day in grade school (especially summer days) seemed to last for an eternity? Ever notice how it seems to take forever to travel a new route on your bike, while the return trip along the same path is done in the blink of an eye?
Turns out, both of those things are connected and they have important implications for the nature of memory. There's a great summary of the science on this up at The Irish Times. It's written by William Reville, emeritus professor of biochemistry at University College Cork.
The key issue, according to Reville, is that the amount of information your brain can store during a given time period isn't really dependent on the length of that time period. You could store up a lot of new information during 10 minutes of a really interesting lecture. You might store only a little new information during 10 minutes of walking your dog along a path you know very well.
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The higher the intensity, the longer the duration seems to be. In a classic experiment, participants were asked to memorise either a simple [a circle] or complex figure . Although the clock-time allocated to each task was identical, participants later estimated the duration of memorising the complex shape to be significantly longer than for the simple shape.
... [H]ere is a “guaranteed” way to lengthen your life. Childhood holidays seem to last forever, but as you grow older time seems to accelerate. “Time” is related to how much information you are taking in – information stretches time.