Published: 03rd July 2017
Smartphone app to help colour blind students conduct lab experiments
The app, Titration ColorCam, is a step forward in the ongoing effort to develop assistive mobile technology to aid blind students
Indian scientists have developed a smartphone app that helps colour blind and visually impaired students detect colour changes in a routine lab experiment, thereby ensuring their active participation and independence. The app, Titration ColorCam, is a step forward in the ongoing effort to develop assistive mobile technology to aid blind students in science, technology, engineering, and mathematics (STEM), said Subhajit Bandyopadhyay and Balraj B. Rathod of the Indian Institute of Science Education and Research (IISER) Kolkata.
It provides a multi-sensory perception of colour change observed in a titration experiment, where a solution of known concentration is used to determine the concentration of an unknown solution. The design and development of the app were primarily focused on the problems faced by colour-blind students in chemistry labs, said Bandyopadhyay who is from the Department of Chemical Sciences. "By following the application tutorial and laboratory training for handling the apparatus, a colour-blind student can perform experiments independently and with ease," he added.
By following the application tutorial and laboratory training for handling the apparatus, a colour-blind student can perform experiments independently and with ease
Subhajit Bandhopadhyay, Department of Chemical Sciences, IISER
It can be freely downloaded from the Google Play Store on Android devices with platform version 2.2 and up. The application uses the camera function of a smartphone to capture and quantify the information involved in a colour change during the titration experiment. The app records and digitises the colour information, and on the desired colour change responds with beep sounds and vibration pulses, which are generated by the smartphone.The work has been documented in a technology report of the Journal of Chemical Education in June.
The app can also be useful for students who have low vision. "For blind students, assistance from sighted peers is required for operational and safety reasons. However, once it is done they can sense the end-point of the experiment with the app and can participate actively in the laboratory setting, which is otherwise not possible," said Banndyopadhyay. Often students either choose to stay out of the chemistry laboratory by themselves, or face difficulties in actively participating in the laboratory activities, thereby relying on passive approaches of learning chemistry, the researchers said in the study.
The app could make the experiment more engaging even for students with normal vision. For optimum working of the application, the laboratory room space should have ambient white lighting. In a naturally lit lab, the apparatus should be placed near a window, said Bandyopadhyay.