Can perception be extended to a “feel of North”? Tests of automaticity with the NaviEar

This study investigated the potential for the development of a new perceptual experience through sustained training with a sensory augmentation device. For this purpose, we developed (1) a new sensory augmentation device, the NaviEar, and (2) a battery of tests for automaticity in the use of the device. The NaviEar translates cardinal direction into sound. Because the signal of this device is comparatively simple and easy to interpret it should facilitate automatization of use. The test battery assesses different effects of automaticity (interference, rigidity of responses, dynamic integration) assuming that automaticity is a necessary criterion to show the emergence of perceptual feel, i.e. the sensory quality of a percept. We measured performance in simple training tasks, administered the tests for automaticity, and assessed subjective reports through a questionnaire. Results suggest that the NaviEar is easy and comfortable to use and has a potential for applications in real-world situations; but 5-day training with the NaviEar does not reach levels of automaticity that are indicative of perceptual feel. We propose that the test battery for automaticity may be used as a benchmark test for the possibility of perceptual feel in sensory augmentation and in sensory substitution.