Generally, a method performed by one or more processing devices includes generating a graphical user interface that when rendered on a display of the one or more processing devices renders a visual representation of an environment and a visual representation of an object in the environment； retrieving an auditory stimulus with one or more auditory attributes indicative of a location of a virtual target in the environment； receiving information specifying movement of the object in the environment； determining, based on the movement of the object, a proximity of the object to the virtual target； adjusting, based on the proximity, one or more values of the one or more auditory attributes of the auditory stimulus； and causing the one or more processing devices to play the auditory stimulus using the adjusted one or more values.
