There is debate around the potential of social media to negatively impact wellbeing, particularly in young people. However, the literature base on this topic is inconclusive. My research aims to explore this potential association, particularly by investigating individual differences which may modulate the impact of social media. By triangulating evidence from self-report and passive measures of social media use, neurocognitive assessments, and both observational and experimental design, I hope to build a more nuanced view of whether specific patterns of use and/or cognitive biases predispose people to experiencing detrimental effects of social media.