When a visual search target frequently appears in one target-rich region of space, participants learn to search there first, resulting in faster reaction time when the target appears there than when it appears elsewhere. Most research on this location probability learning (LPL) effect uses 2-dimensional (2D) search environments that are distinct from real-world search contexts, and the few studies on LPL in 3-dimensional (3D) contexts include complex visual cues or foraging tasks and therefore may not tap into the same habit-like learning mechanism as 2D LPL. The present study aimed to establish a baseline evaluation of LPL in controlled 3D search environments using virtual reality. The use of a virtual 3D search environment allowed us to compare LPL for information within a participant’s initial field of view to LPL for information behind participants, outside of the initial field of view. Participants searched for a letter T on the ground among letter Ls in a large virtual space that was devoid of complex visual cues or landmarks. The T appeared in one target-rich quadrant of the floor space on half of the trials during the training phase. The target-rich quadrant appeared in front of half of the participants and behind the other half. LPL was considerably greater in the former condition than in the latter. This reveals an important constraint on LPL in real-world environments and indicates that consistent search patterns and consistent egocentric spatial coding are essential for this form of visual statistical learning in 3D environments.
Bibliographical noteFunding Information:
CS was supported by the National Science Foundation’s Graduate Research Fellowships Program and NRT Training Grant. This study was supported in part by the Engdahl Family Research Fund. We thank Hunter Schouviller and Julie Jia for help with data collection.
During the early stages of study development, Caitlin Sisk was funded by the National Science Foundation NRT Training Program in Translational Sensory Science. This traineeship also facilitated the collaboration with Victoria Interrante that made this research possible. During most of the period of data collection, analysis, and manuscript preparation, Caitlin Sisk was funded by the National Science Foundation’s Graduate Student Fellowship Program. This funding afforded Caitlin the time to conduct this research project. The study was supported in part by the Engdahl Family Research Fund.
© 2021, The Author(s).
PubMed: MeSH publication types
- Journal Article
- Research Support, U.S. Gov't, Non-P.H.S.