Vertical-plane MAA discrimination is tested with three-interval forced choice

Evidence

In each trial, three consecutive stimuli were presented. Two represented the reference incidence angle (0° or 120°) and one represented the variable angle (the ‘target’) determined by the adaptive procedure. The test subject’s task was to determine the diverging stimulus by pressing one of three buttons on a touch screen, on which the target stimulus was randomly assigned to one of the buttons in each trial. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3052

Categorization

• DEFINE: Concrete operationalization of the 3-AFC task for spatial angle discrimination.