By increasing the amount of spam, we wanted to see if there was a gradual or absolute threshold in ranking effect. The threshold of the Panda effect isn’t based on a single page. To see what caused the threshold to be different for different...
On the threshold of the anniversary of the 2.0 release, with numbers down and a situation so critical that they're going to force people to use the viewer while not addressing critical design issues- timing is everything.
You can set up a series of threshold values as different goals with different values (e.g.one minute, two minutes, etc). They don't have to have accurate absolute values (unless your site also has e-commerce).
In some cases, you can spot losers by comparing their performance against a known threshold. Here's a sample chart that shows the absolute value, week/week changes and 12 week trends for a variety of metrics for Yahoo.
