Paranoia across both clinical and non-clinical populations is closely linked with the negative self. Recent research has begun to investigate self-affirmation processes as a way to target the self and thereby attenuate non-clinical paranoia. For the first time, the effects of reflecting on personally meaningful values, and pursuing valuesbased goals, on non-clinical paranoia was assessed over time. Using a mixed experimental design, an opportunity sample of adults from student and general population settings (N = 171) were randomised to either value-affirmation (VA), value-affirmation plus goal-setting (VAG), or non-affirmation control (NAC). The procedures traditionally used for value-affirmation were adapted to increase clinical validity, drawing on methods used for value-clarification in Acceptance and Commitment Therapy (ACT). State paranoia and positive affect was assessed pre, post, and two-weeks following affirmation. In support of predictions, there was a significant interaction between conditions on state paranoia over time. This remained significant when change in positive affect associated with completing valueaffirmation procedures was accounted for in the analyses. Decomposing this interaction showed that there were significant reductions in paranoia over time in the VAG condition. Exploratory analysis indicated that only those participants who acted on values-based goals showed significant attenuations in paranoia over two weeks. There was no significant reduction in paranoia over time in the VA condition. The results are in support of self-affirmation theory, and contemporary theory in clinical psychology, which suggest that living in line with personally meaningful values gives psychological benefits in buffering against self-threats, over and above reflection on personally meaningful values.