Google's New Algorithm Incorporates Human Feedback About Quality Sites

More

Tucked inside Steven Levy's interview with Google engineers Amit Singhal and Matt Cutts, there's a fascinating detail about how the company recently improved its search algorithm.

They used human feedback.

Here's how they described their methodology to Levy in the Wired piece.

Singhal: We wanted to keep it strictly scientific, so we used our standard evaluation system that we've developed, where we basically sent out documents to outside testers. Then we asked the raters questions like: "Would you be comfortable giving this site your credit card? Would you be comfortable giving medicine prescribed by this site to your kids?"
Cutts: There was an engineer who came up with a rigorous set of questions, everything from. "Do you consider this site to be authoritative? Would it be okay if this was in a magazine? Does this site have excessive ads?" Questions along those lines.
Singhal: And based on that, we basically formed some definition of what could be considered low quality.

So, to simplify. They asked human beings, "Is this site high or low quality?" Then looked for patterns in their data that could be used to identify the sites that humans rated poorly.

Now, that last operation -- "basically [forming] some definition of what could be considered low quality" -- seems like the tough part, and we don't get any details about it. But it does answer a key question I've had. How did they pick out low quality sites? Simple! They asked some people. (The future is now.)

Jump to comments
Presented by

Alexis C. Madrigal

Alexis Madrigal is the deputy editor of TheAtlantic.com. He's the author of Powering the Dream: The History and Promise of Green Technology. More

The New York Observer has called Madrigal "for all intents and purposes, the perfect modern reporter." He co-founded Longshot magazine, a high-speed media experiment that garnered attention from The New York Times, The Wall Street Journal, and the BBC. While at Wired.com, he built Wired Science into one of the most popular blogs in the world. The site was nominated for best magazine blog by the MPA and best science website in the 2009 Webby Awards. He also co-founded Haiti ReWired, a groundbreaking community dedicated to the discussion of technology, infrastructure, and the future of Haiti.

He's spoken at Stanford, CalTech, Berkeley, SXSW, E3, and the National Renewable Energy Laboratory, and his writing was anthologized in Best Technology Writing 2010 (Yale University Press).

Madrigal is a visiting scholar at the University of California at Berkeley's Office for the History of Science and Technology. Born in Mexico City, he grew up in the exurbs north of Portland, Oregon, and now lives in Oakland.

Get Today's Top Stories in Your Inbox (preview)

Why Are Americans So Bad at Saving Money?

The US is particularly miserable at putting aside money for the future. Should we blame our paychecks or our psychology?


Elsewhere on the web

Join the Discussion

After you comment, click Post. If you’re not already logged in you will be asked to log in or register. blog comments powered by Disqus

Video

The Death of Film

You'll never hear the whirring sound of a projector again.

Video

How to Hunt With Poison Darts

A Borneo hunter explains one of his tribe's oldest customs: the art of the blowpipe

Video

A Delightful, Pixar-Inspired Cartoon

An action figure and his reluctant sidekick trek across a kitchen in search of treasure.

Video

I Am an Undocumented Immigrant

"I look like a typical young American."

Video

Why Did I Study Physics?

Using hand-drawn cartoons to explain an academic passion

Writers

Up
Down

More in Technology

Just In