Google did a survey to determine why and how people decide what movies to see. Flavorwire reports:

Unsurprisingly, they’re trumpeting the prominence of Google-owned YouTube, noting that four out of five moviegoers “use video sites to look for more information about a film” (well, duh). Thirty-nine percent report the official movie trailer influences their decision most — a factor more than three times as important as the runner-up, “information on the cast” (11 percent). “A friend’s opinion” is third (with eight percent). Reviews are somewhere below that, perhaps right around “Ugh, it’s what he wanted to see” and “Hunger Games was sold out.”