Source memory is a cognitive process involved in remembering contextual features of information. This symposium will bring together five researchers who will present recent evidence obtained from various substantive research questions about source memory. First, Tanyas et al. give a talk entitled “Testing the Serial Processing Model of Item and Source Retrieval: Applying the Additive Factor Method to Source Monitoring” and ask whether retrieval processes for an item (e.g., what was said?) and its source (e.g., who said it?) operate serially or in parallel. Focusing on more applied source memory research, Ülker and Bodemer examine external source memory (also with the “who said what” paradigm) and knowledge acquisition in a pseudo-collaborative setting with their talk “Source Memory and Collaborative Learning: The Role of Group Composition and Conflicting Information”. Following this, Symeonidou and Kuhlmann give a presentation namely “Enhanced Source Memory for Emotional Sources: What Is the Role of Encoding Instructions?” where they investigate how encoding instructions influence source-emotionality effects on source memory by using multinomial modeling. The next talk is “Exploring Source Memory to Understand the Mechanisms of JOL Reactivity.” by Loaiza et al. By using a novel implementation of a hierarchical Bayesian model of multidimensional source memory, they query in their registered report, how the act of assessing one’s learning influences later memory. Finally, Niedziałkowska and Nieznański present their work entitled “How Does Cognitive Load Influence Recollection of True/False Information?” and report findings revealing that cognitive load impairs recollection of false information compared to true information.