Visual Search and Gaze Behaviour during Active Locomotion in Complex Virtual Environments
Dienstag, 23. Mai 2017, 16:15 Uhr bis 17:30 Uhr
The process of visually searching for information or target objects, particularly while actively moving through the environment, can be conceptualised as a special form of foraging. Here we present results from a visual search task in which participants were required to 'walk' through complex virtual indoor environments, while their gaze behaviour was recorded. In the experiment, participants were first presented with a static view of the environment (static visual search phase) and instructed to search for a particular target object. If they found the target object they pressed a button and then walked towards it in order to 'pick it up' (visual approach phase). If they did not find the target in the static scene, they actively navigated through the environment, searching for the target until they spotted it (visual search + locomotion phase), and then walked towards the target to pick it up (visual approach phase). The comparison of eye-tracking data between these three distinct phases allowed us to disentangle the specific contributions of search and locomotion to gaze behaviour. Moreover, by combining virtual environments with eye-tracking technology we were able to translate the attended screen locations into the actual 3D coordinates in the virtual environment which allowed for novel analyses taking the three dimensional structure of space into account. The results of this study are discussed in the context of established effects in visual search.
Raum: Y25 H 92
Geographisches Institut, UZH