I remember, there are a lot of studies about the (supposed) psychological traits of persons who believe in "conspiricy theories". Getting to the big parts, I still have some criticism of the study
- You use a sample of students. No matter how lage the number are, do you really believe students are representative of the entire population of "conspiricy believers"?
- How could you messure intellectuall humility?
- The correlation between agreeableness and belief in conspiracy theories is easily explained by the fact that you will most likely get a lot of strange looks if you confess your conspiratorial beliefs in an academic environment. I doubt that this result would be transferable to other environments such as "normal" workspaces, nights out in pubs, and the like.