I run Spybot Search & Destroy on my computer(s) regularly. It'll occasionally identify and remove a "tracking cookie" or other item that's on its list of objectionable stuff. An example would be a cookie that's reporting to one site what other sites I visit.

In the 7 years or so that I've been using Spybot S&D, it's found and removed about 3 dozen tracking cookies. Most of those were early on with only about 2 a year lately. It's never yet found one that seemed to have anything to do with Psych Central.