Research on the effectiveness of digital textbooks using PDF files that are made from print textbooks, for university students who have difficulty to handle print textbooks

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In this research, a digital textbook which was composed of PDF files of a generally used print textbook was suggested as an alternative textbook for university students who had difficulty to handle the generally used print textbooks because of their severe physical disabilities. Effectiveness of the suggested method was experimentally evaluated. A subject was an university student whose upper limbs were partially paralyzed, and she had difficulty to handle generally used print textbooks. A few digital textbooks were made for the evaluation by the suggested method. Her physical and mental workloads at using both print text books and digital textbooks were measured respectively by the technique of NASA-TLX. From the result of the evaluation, it was indicated that the physical and mental workloads at using digital textbooks was significantly smaller than that at using print textbooks. This result suggested the effectiveness of the digital textbooks that was made with the suggested method.