Development of Diagnostic Tests to Identify Difficulties of Learning Basic Arithmetic for Deaf Students Vega Dwi Nurani (a), Jarnawi Afgani Dahlan (a), Aan Hasanah (a)
Department of Mathematics Education, The Faculty of Mathematics and Natural Sciences Education, Indonesian University of Education.
Abstract
Deaf students tended to get lower mathematics achievement than normal students at the same class or age. One of the contributing factors was the lack of understanding of mathematics basic concepts, namely basic arithmetic because deaf students have difficulty to grasp the meaning of language in mathematics which has an abstract nature. This study aimed to develop a diagnostic test which met criteria of validity and reliability in identifying difficulties of basic arithmetic for deaf students. This study uses research and development methods consisting of planning stage, development stage, and test application stage. Based on the test of content validity, was obtained 30 items declared valid with a CVR (Content Validity Ratio) value for each item is 1. Meanwhile, based on the test of reliability, showed 30 items had a value Cronbach Alpha of 0.773 which meant the developed test in the acceptable category.
