Researching Genre; Horror

My research for our chosen genre (horror) consisted of the following movies:
The knowing
The Ring 3
SAW V
throughout my individual research i found that many teaser trailers contain very similar conventions for the same genre. below is a descripive example of my findings for the horror genre.

'The Knowing' trailer
A voice over is heard which introduces the main characters, showing loving relationship, typical of a horror. Usually some sort of closeness or connection between two people. In this particular trailer, it is father and son. Mum had previously died. Characters profession is shown, probably chosen because it doesn’t give away the narrative, it is more background information, showing that the genre maybe sci-fi (doesnt reveal that main genre is horror). The setting emphasises time by showing computers and updated technology. This also leaves the audience with the question ''is this a sci fi film?'. Shows some of the narrative, but the part where it makes the ending unpredictable, it shows different parts of the story without linking it up completely so you still want to go and see it to find out how it all comes together.

'The Ring 3' Teaser trailer
Fan made teaser trailer. Close ups of “underground movies” typed on Google.com, from this we know what time the movie is set, and we automatically know that someone is onto something and needs to research something mysterious. slightly disturbing images. This immdiately tells the audience that it is not for young viewers. The makers of this teaser trailer have taken the original idea from the first film and recreated it. (idea of a home video being explosed). The idea that it is a dvd rather than a video tape tells us that it is made in present day. shows us the different ages of our technology from past to present). Big bold writing is placed between each cut (common in all teaser trailers). They show many flashbacks from the first film, giving the audience idea that the storyline may connect to this first movie. At the end of the teaser trailer the words 'THE RING 3 - COMING SOON' is presented, with the evil girl from the first movie on the front. The words ' coming soon' is also familiar in teaser trailers and it is used to attract and maintain the interest of the audience.

'SAW V' teaser trailer
Narrative conventions: anonymous killer - evil - enigma throughout the teaser trailer (and film). only one character is shown in this teaser trailer, possibly the main character. No narrative is told throughout this teaser trailer. shows mans head stuck is a painful box type object - he looks frightened and knows someone or something wants him dead - the audience is left with the following questions:
does he survive?
who is trying to kill him?
why are they trying to kill him?