[PI-2-7] Design and Usability Testing of a Tablet-Based Mobile Application for Assessing Children’s Visual Perception
Visual perception plays a critical role in reading, writing, and movement. Without it, children may find daily tasks such as completing homework, playing with toys, or getting dressed extremely stressful. It is important to recognize the development of visual perception of children at an early stage. The aim of this study was to design and validate a tablet-based mobile application to assess a child's visual-perceptual strengths and weaknesses and test it for usability in therapists. The study was followed in two stages: (1)Participatory design/development (including therapists and computer scientists) stage was initially taken to identify the application to the clinical practice. A screening test of visual perception (STVP), consists of 7 perceptual areas (visual discrimination, visual memory, visual-spatial relationships, visual form constancy, visual sequential memory, and visual figure/ground), utilized with black and white line drawings, was developed. The STVP app includes 10 items in each perceptual area, and the scores for each area are automatically presented in a visual bar graph. (2) Usability testing stage: usability (SUS) and satisfaction of the system were assessed by 8 therapists. The overall value of SUS for STVP app was 73.75. The rating in alphabet resulted in C or OK. Based on the preliminary results, it can be concluded that this application for visual perception screening test has met the usability criteria. Hence, the STVP is a feasible system for clinical use.