Raðáhrif í sýndarveruleika: áhrif dýptar, óvissu og sértæki hluta

Human visual perception tends to be stable and continuous despite persistent noise in visual signals from occurrences like blinks, occlusion, and lighting changes. Prior research suggests that this perceptual stability stems from visual perception being serially dependent. Serial dependence refers to the idea that recent visual experiences can bias present visual experiences. Serial dependence has been found to influence the perception of many objects and stimuli features like orientations, numerosity, and faces. However, until now, no experiments have examined serial dependence in virtual reality (VR). In this bachelor thesis, serial dependence was examined with an orientation judgement task in VR, where participants were presented with three-dimensional (3D) models of realistic objects. The stereoscopic depth that VR offers was utilized to test if serial dependence occurs for in-depth stimulus orientations. Moreover, the distance of the stimulus was manipulated to assess how visual uncertainty influences serial dependence. Lastly, a test of object-specificity for serial dependence was performed, where the 3D models systematically stayed the same or changed between trials. Serial dependence was found to occur for both fronto-parallel and in-depth stimulus rotations. Therefore, showing that serial dependence can occur in natural environments and that the bias likely occurs for all possible stimulus rotations. Present visual uncertainty was found to increase serial dependence, but prior uncertainty was not found to impact the bias. No evidence was found suggesting object-specificity in serial dependence. That could imply that serial dependence is a post-perceptual bias or a perceptual bias originating from low-level visual processing