Horror/Thriller Film research

The top ten Grossing Horror/Thriller Movies of all time (US)
source: http://www.imdb.com/search/title?genres=horror&sort=boxoffice_gross_us,desc

1. What Lies Beneath          $155,000,000

2. Gremlins                          $148,000,000
3. The Blair Witch Project   $141,000,000
4. A Christmas Carol          $138,000,000
5. Godzilla                          $136,000,000
6. The Ring                        $129,000,000
7. The Grudge                    $110,000,000
8. Paranormal Activity       $108,000,000
9. Scream                           $103,000,000
10.Scream 2                       $101,000,000

Since it's inception, horror has continually evolved to assosciate itself with the most influential group of a culture. In recent decades this evolution has seen the genre create a strong attachment to teenagers and young adults.
A variety of sub-genres fill the horror genre including but not limited to; slasher, thriller, paranormal, and torture. As a general rule they will undoubtedly include many elements of gore, darkness, liberal use of profanities and generally disturbing ideas. It is for these reasons that they are generally certificated at a 15 or 18 by the BBFC.

I will be further researching the following films for different purposes:
What Lies Beneath -  Gothic Elements
The Ring - Imagery and atmosphere
Scream - Horror Cliches