The Method of Loci in Virtual Reality: Explicit Binding of Objects to Spatial Contexts Enhances Subsequent Memory Recall
The method of loci (MoL) is a well-known mnemonic technique in which visuospatial spatial environments are used to scaffold the memorization of non-spatial information. We developed a novel virtual reality-based implementation of the MoL in which participants used three unique virtual environments to serve as their “memory palaces.” In each world, participants were presented with a sequence of 15 3D objects that appeared in front of their avatar for 20 s each. The experimental group (N = 30) was given the ability to click on each object to lock it in place, whereas the control group (N = 30) was not afforded this functionality. We found that despite matched engagement, exposure duration, and instructions emphasizing the efficacy of the mnemonic across groups, participants in the experimental group recalled 28% more objects. We also observed a strong relationship between spatial memory for objects and landmarks in the environment and verbal recall strength. These results provide evidence for spatially mediated processes underlying the effectiveness of the MoL and contribute to theoretical models of memory that emphasize spatial encoding as the primary currency of mnemonic function.
KeywordsMemory enhancement Method of loci Virtual reality
The authors of this project extend an enormous gratitude to Forde “JubJub” Davidson for his countless hours of virtual scripting and design, without which this current work would not have been possible. A thanks is also sent to Majed Samad, Ph.D., for his assistance with creating PsychToolbox testing materials and to John Dell’Italia for guidance on statistical analyses.
This work was supported by a Defense Advanced Research Project Agency (DARPA) Research Grant awarded to J.R. (D13AP00057) and National Science Foundation (NSF) Graduate Research Fellowships awarded to N.R. (DGE-1650604) and J.K-Y.E. (DGE-1144087).
Compliance with Ethical Standards
Conflict of Interest
The authors declare that they have no conflict of interest.
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