Use this URL to cite or link to this record in EThOS:
Title: The influence of stroboscopic auditory stimuli on visual apparent motion perception
Author: Haas, Michael William
ISNI:       0000 0001 3523 2950
Awarding Body: University of Southampton
Current Institution: University of Southampton
Date of Award: 1996
Availability of Full Text:
Access from EThOS:
Full text unavailable from EThOS. Please try the link below.
Access from Institution:
The understanding of human motion perception has fundamental importance. This thesis increases that understanding by investigating the influence of moving auditory stimuli on visual apparent motion perception. Within this thesis, a new model of visual-auditory apparent motion perception is described based upon literature regarding intra-sensory and inter-sensory apparent motion perception. Characteristics of, and refinements to, this new model are founded upon experiments described in this thesis. These experiments investigate perceptual organization of visual stimuli driven by inter-stimulus interval (ISI) and angular extent in the presence of moving and non-moving auditory stimuli. Influence characteristics of contemporaneous moving auditory stimuli on angular-extent-driven and ISI-driven visual perceptions were measured in five experiments. The influence was found to be small, susceptible to perceptual hysteresis, and existed only when the visual-based perception was ambiguous. When angular-extent-driven stroboscopic visual stimuli of approximately 5° horizontal extent were augmented with moving auditory stimuli, a shift was measured of 15% to 19% in the angular extent capable of sustaining stable perceptions. A shift in ISI of 6.5%, within ISIs ranging from 83ms to 150ms, was measured in the ISI capable of sustaining stable perceptions of ISI-driven stroboscopic visual stimuli when augmented with moving auditory stimuli. The small auditory influence over visual apparent motion perception affected performance of a complex task, that task being tracking of an intermittent visual-auditory target, relative to tracking of an intermittent visual-only target. The auditory influence was affected by characteristics of the target movement and caused a reduction in the power spectral density of correlated and non-correlated tracking error between 0.1Hz and 0.5Hz. Dynamic characteristics of an auditory localizer, which was used in a large portion of the work, were evaluated to assess the ability to generalize the experimental results in this thesis to other conditions. The auditory localizer generated auditory stimuli that elicited velocity discrimination of 14% of velocities between 20° sec ⁻¹ and 100°sec⁻¹. The minimum auditory movement angle measured using the auditory localizer was 8.1° at 90°sec⁻¹, which differed from previous studies in the literature using real stimuli by less than 3%.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Human-computer interaction; Virtual reality