Pauley Perrette and Mark Harmon

Social network discussions about television shows drove more live viewing and second-screen engagement during the 2010-2011 television season, according to a TVGuide.com user research study that ranks the year's top 10 most social shows. Twenty percent of respondents said they are now watching more live TV to avoid plot and reality "spoilers" that may be revealed in real time by members of their social networks. At the same time, TVGuide.com, which has more than 23 million monthly unique users, found that users are spending more time engaging in TV discussions with their social networks, with more using Twitter than Facebook for those discussions.

The top 10 most social shows of the 2010-2011 season, based on TVGuide.com episode check-ins, Facebook Likes and comments on the site are:

1. NCIS
2. American Idol
3. Criminal Minds
4. Glee
5. House
6. Fringe
7. Bones
8. Castle
9. Smallville
10. Law & Order: Special Victims Unit

In addition, the user survey showed the following:

-Users said they are more likely to talk about their favorite shows on Twitter and Facebook before and after the show airs rather than during the show. Of users who talk on Twitter, 62 percent said they engage before the show airs, 69 percent after, and 47 percent during. Of users who talk on Facebook, 47 percent engage before the show airs, 68 percent after and 24 percent during.

-Of those who browse social networks while watching TV, 35 percent of Facebook users said they talk about the show they are watching, while 65 percent said they do something else. Among Twitter users who browse while watching TV, 50 percent said they talk about the show they are watching, while 50 percent said they do something else.

-Asked why they share what shows they are watching via social networks, users said the top three reasons are: 1) to tell friends what shows they like to watch (77 percent); 2) to help keep their shows on the air (66 percent); and 3) to telling their friends about new shows (57 percent).

See the full study here:

TVGuide.com launched TV check-in "I'll Watch" buttons on its site on October 20, allowing users to update their social status with what they're watching, and has seen a 60 percent increase in check-ins and more than 2.7 million total check-ins over the course of the season.

(This survey was conducted in April 2011 on TVGuide.com, with 1,586 respondents. Social show statistics are based on internal TVGuide.com Omniture reporting.)