Initially the thought was to only test on one person at a time, but due to the lack of dialogue under the test and the time it took to test one person at a time, it was decided to test on two at a time. This lead to more discussions while watching the clips, and unfortunately also to discussions while answering the questionnaires. This might be a source of bias, because by discussing while answering the questionnaires, and sitting right next to each other, the test participants could easily influence each other. This could lead to test participants who might not have noticed any differences between the clips, becoming aware of them, and also having participants who are unsure relying on the answers of a more assertive participants. It was deemed that the benefits of the discussion, and the support of having someone else in a similar situation, outweighed the bias.