AngleSizer: Enhancing Spatial Scale Perception for the Visually Impaired with an Interactive Smartphone Assistant

TL;DR

AngleSizer is a smartphone-based interactive tool that significantly improves spatial perception for the visually impaired through natural gestures, feedback, and tailored learning modules, enabling cost-effective and independent learning.

Contribution

We introduce AngleSizer, a novel smartphone assistant that enhances spatial perception for the visually impaired using interactive gestures and multisensory feedback, addressing key barriers in traditional learning methods.

Findings

Validated effectiveness through extensive user experiments

Improved spatial perception and independent learning capabilities

Applicable across diverse abilities and visual conditions

Abstract

Spatial perception, particularly at small and medium scales, is an essential human sense but poses a significant challenge for the blind and visually impaired (BVI). Traditional learning methods for BVI individuals are often constrained by the limited availability of suitable learning environments and high associated costs. To tackle these barriers, we conducted comprehensive studies to delve into the real-world challenges faced by the BVI community. We have identified several key factors hindering their spatial perception, including the high social cost of seeking assistance, inefficient methods of information intake, cognitive and behavioral disconnects, and a lack of opportunities for hands-on exploration. As a result, we developed AngleSizer, an innovative teaching assistant that leverages smartphone technology. AngleSizer is designed to enable BVI individuals to use natural interaction gestures to try, feel, understand, and learn about sizes and angles effectively. This tool incorporates dual vibration-audio feedback, carefully crafted teaching processes, and specialized learning modules to enhance the learning experience. Extensive user experiments validated its efficacy and applicability with diverse abilities and visual conditions. Ultimately, our research not only expands the understanding of BVI behavioral patterns but also greatly improves their spatial perception capabilities, in a way that is both cost-effective and allows for independent learning.