For our PSYC399 project, we created the NPU-Anxiety Test by modifying an existing paradigm that induced fear to instead induce anxiety through a social-evaluative stress. We studied how participant’s perseverative thoughts (worry and rumination) unfolded before and after facing predictable and unpredictable stressors. These stressors included a series of cognitive tests that participants were told would be scored by an experimenter and compared to other Penn students. Apart from rating their thoughts continuously, participants retrospectively rated their levels of positive and negative affect. Lastly, as a manipulation check, a debriefing questionnaire was administered to assess how well the paradigm elicited its desired effects.