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Visual attention is critical for everyday task performance and safety. It allows people to detect and process critical visual objects, information, and potential hazards in an environment to respond to (Carrasco, 2011). An individual’s ability to distribute visual attention in space can be assessed by a computerized task that measures an ability to detect and respond to visual targets in a wide area of one’s focal and peripheral visual field. The Attentional Visual Field (AVF) task is a computerized task that displays a visual stimulus on a computer screen, and people need to identify a target among distractors while attending to a large visual field (Feng et al., 2017; Feng & Spence 2014).

Traditionally, an Attentional Visual Field task is developed for and conducted on a desktop computer. While completing this task, participants are instructed to keep their heads in a chinrest to ensure that the visual stimuli are displayed at the appropriate size and distance. Participants must also fixate on a central point on the screen around which the other visual stimuli are calibrated to be at certain distances from the center of the visual field. This task measures the spread of attention across the visual field by displaying targets at different locations in the visual field based on the target's direction and distance from the center of the visual field. Participants are instructed to indicate which direction the target appears in for each trial, and their accuracy and response time are used to describe the shape of their attentional visual field.

For a detailed explanation, please refer to the CHI EA article: https://dl.acm.org/doi/10.1145/3491101.3519698

For a visual representation of the XR AVF Task:

The project has been tested on the HTC Vive (Pro) and the Valve Index, however visual angle may differ in other VR or AR devices.

• Getting Started
• Experiment Settings Explanation
• Data Output Explanation

In case of any further questions or problems in the documentation, please contact: [email protected].

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