The first influence methods that can be found in the movie is Consultation - asking and otherwise involving others. This method can be observed when juror #1 states: “you fellas can handle this thing any way you want to, I am not making any rules, well we can discuss it first and then vote on it or well vote right now.” Juror #1 takes the initiative of taking leadership of the group, and asks, and involves others in the best way to reach a decision for this case in a fair and organized manner.
A second method found in the movie is Ingratiating - Praising before requesting - it can be seen when Juror #4 discusses the facts of why the kid is a murderer using the evidence shown in the court, to which he asks Juror #8: “ Am I right so far?” Juror #3 intervenes without being questioned and responds: “you bet he is.” Juror #3 praises Juror #8 without being requested.
Thirdly we found Pressure - threatening, intimidating. This method of influence is observed when Juror #3 tries to intimidate Juror #5, raising his voice and states: “Just because a golden voice poured his heart out about an unprivileged kid […] and you change your mind, this is the most sick […]”