Browsing by Author "Pullinen, Akseli"
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Item Boundary extension for visual views in virtual reality(2024-03-11) Pullinen, Akseli; Henriksson, Linda; Sähkötekniikan korkeakoulu; Henriksson, LindaBoundary extension is a phenomenon describing a tendency for people to mistakenly add new information to the borders of an image they are trying to recollect, beyond the borders of the original image. This effect is thought to reflect a spatial bias of our memory for visual scenes, but it remains unclear whether the results generalize from images to more naturalistic viewing behaviour. The goal of this thesis was to address this question through an experiment using naturalistic virtual reality environments as visual stimuli. This novel experiment was developed in-house, leading to an additional goal for the project to be the development of boundary extension research methodology for virtual reality. At each trial, the subjects (N = 60) were first allowed to visually explore a virtual room for 5 seconds. Soon after the viewing, they were put back into the same room, but to a different distance away from the wall they had been previously facing. The subjects then used a controller to move to the same location from which they had originally viewed the room. Boundary extension was thought to emerge if a tendency could be found for the subjects to stop moving when the distance between them and the wall they had originally faced exceeded the distance during the initial viewing. Boundary extension was found in scenarios where the subject needed to move closer to the wall in order to reach their original location, and also in any scenario where the visual exploration was done with the subject being close to the wall. These results are in accordance with previous research and suggest that the phenomenon of boundary extension generalizes to real-world scene perception.Item Eye tracking for virtual reality: principles and challenges(2021-05-11) Pullinen, Akseli; Henriksson, Linda; Sähkötekniikan korkeakoulu; Turunen, Markus