SMARTPHONE UPLOADED PHOTOS AND VIDEOS REVEAL YOUR LOCATION BY DEFAULT It wouldn’t be 2010 if people didn’t love going out, taking pictures with their iPhones and Blackberries and posting them online. It is not only a great way let your friends know what you are up to, it is a great way to unknowingly reveal […]
MYTHS AND TRUTHS ABOUT AN OFTEN-USED, LITTLE-UNDERSTOOD STATISTICAL PROCEDURE If you go to a consumer research conference, you will hear tales of how experiments have undergone particular statistical rites: the attainment of the elusive crossover interaction, the demonstration of full mediation through Baron and Kenny’s sacred procedure, and so on. DSN has nothing against any […]
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LATITUDE + LONGITUDE + OVERPLOTTING FIX = MAPS Decision Science News is always learning stuff from colleague, physicist, mathlete, and all-around computer whiz Jake Hofman. Today, it was a quick and clean way to make nice maps in R without using any map packages: just plot the latitude and longitude of your data points (e.g. […]
QUIZ YOUR LOVED ONES ABOUT THEIR PROPENSITY TO PLAN John Lynch, Richard Netemeyer, Stephen Spiller, Alessandra Zammit have recently published in the Journal of Consumer Research this article on the propensity to plan and financial well being ABSTRACT Planning has pronounced effects on consumer behavior and intertemporal choice. We develop a six-item scale measuring individual […]
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PROS ARE NOT GETTING BETTER AT FREE THROWS Rick Larrick recently told Decision Science News that baseball players have been getting better over the years in a couple ways. First, home runs and strikeouts have increased. The careless or clueless reader might note that this is curious, for from the batter’s perspective home runs are […]
COUNTERINTUITIVE PROBLEM, INTUITIVE REPRESENTATION Blog posts about counterintuitive probability problems generate lots of opinions with a high probability. Andrew Gelman and readers have been having a lot of fun with the following probability problem: I have two children. One is a boy born on a Tuesday. What is the probability I have two boys? The […]
IMAGINING THE FUTURE TO HELP PREPARE FOR IT The New York Times just ran a piece called Some Novel Ideas for Improving Retirement Income about having people read Victorian novels in order to increase their retirement savings rates. Actually, that is not true. But it did feature some newer ideas from Psychology and Behavioral Finance […]
In baseball, what are the chances the winner will win again against the same opponent the very next day?
INCREDIBLY SIMPLE CALCULATIONS MADE SIMPLE Yes, we all know how to calculate 15% or 20% exactly, but it’s fun to use tipping heuristics and even more fun to make crowded graphs of how they compare to each other. (Sorry for the junky chart. Open for suggestions, in the words of Tom Waits.) Here are a […]
How many observations should you have before constructing a confidence interval?
