Auditory-somatosensory multisensory interactions in humans: Dissociating detection and spatial discrimination

▶ Stimulus detection is facilitated under multisensory conditions. ▶ Facilitation of auditory-somatosensory detection withstands spatial separation. ▶ This facilitation withstands the task-relevance of spatial information. ▶ Retrograde spatial probe performance was impaired on multisensory trials. ▶ Multisensory interactions can reduce spatial acuity for unisensory information.