[Ads-l] p-hacking
Dave Hause
dwhause at CABLEMO.NET
Mon Oct 8 04:56:34 UTC 2018
Might this version of hack be in the sense of a clever way to do something,
similar to NOAD, 2nd, n.: 2. . . .a piece of computer code that performs
some function, especially an unofficial alternative or addition to a
commercial program.
Dave Hause
-----Original Message-----
From: George Thompson
Sent: Sunday, October 7, 2018 1:15 PM
To: ADS-L at LISTSERV.UGA.EDU
Subject: p-hacking
A recent blog post used a term quite unfamiliar to me -- but, then, it
would be. But it's not in the OED either. It appeared in an
installment of a blog originally issued by NPR under the title
"Cornell Food Researcher's Downfall Raises Larger Questions For
Science"; the blog is called FOOD FOR THOUGHT.
September 26, 20183:07 PM ET
https://www.npr.org/sections/thesalt/2018/09/26/651849441/cornell-food-researchers-downfall-raises-larger-questions-for-science
"There's nothing wrong with having a lot of data and looking at it
carefully," Althouse says. "The problem is p-hacking."
To understand p-hacking, you need to understand p-values. P-values
tell you how likely it is that a result from an experiment is due to
chance or natural variations in the experiment. For example, if you go
on a diet, the p-value can estimate the chance that the weight you
lost was the result of natural background fluctuations in your weight
as opposed to because of your new diet.
P-hacking is when researchers play with data to arrive at results that
look like they're scientifically significant. For instance, they can
cherry pick data points, re-analyze the data in multiple ways or stop
an experiment early.
I suppose the expression is connected with the OED's
hack, v.3, section 1. transitive. To make a hack of; to use in an
indiscriminate way; to make common, stale, or trite by such treatment.
At least, the phrase in the definition "use in an indiscriminate way"
seemed appropriate.
GAT
--
George A. Thompson
The Guy Who Still Looks Stuff Up in Books.
Author of A Documentary History of "The African Theatre", Northwestern
Univ. Pr., 1998.
But when aroused at the Trump of Doom / Ye shall start, bold kings,
from your lowly tomb. . .
L. H. Sigourney, "Burial of Mazeen", Poems. Boston, 1827, p. 112
The Trump of Doom -- also known as The Dunghill Toadstool. (Here's a
picture of his great-grandfather.)
http://www.parliament.uk/worksofart/artwork/james-gillray/an-excrescence---a-fungus-alias-a-toadstool-upon-a-dunghill/3851
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