Tangible Construction Kit for Blind and Partially Sighted Drawers: Co-Designing a cross-sensory 3D interface with blind and partially sighted drawers during Covid-19

Drawing as an activity aids problem solving, collaboration, and presentation in design, science, and engineering and artistic creativity as well as expression in the arts. Unfortunately, blind, and partially sighted learners still lack an inclusive and effective drawing tool, even in the digital age. In response, this research aims to explore what an effective drawing tool for blind and partially sighted individuals (BPSI) would be. Raised-line drawing kits aim to provide this, but in prior work, our usability tests of raised line graphics with blind and partially sighted participants rated the raised line graphics that we tested as barely comprehensible relative to 3D models, which they rated as highly comprehensible. Semi-structured interviews with our participants afterward suggest that they found 3D models to be more comprehensible because these are consistent with haptic principles of perception whereas conventions of raised line graphics, such as a line representing a surface edge, replicate visual cues of source images and thereby violate haptic principles of perception. Therefore, we hypothesize that a drawing tool for blind and partially sighted drawers could be effective by recruiting affordances of 3D models. Through co-design sessions conducted during the Covid-19 pandemic with blind and partially sighted drawers (BPSD), we prototyped a tangible 3D model construction kit for non-visual haptic drawing with a digital interface to a 3D virtual environment. Our current investigation of user needs is informing us of our ongoing iterative development of an accessible 3D scanning application that is enabling blind and partially sighted individuals to build and scan in 3D models constructed from a more flexible range of materials beyond what was possible with our previous prototype.