The Use of Android Game to Improve Impaired Hearing Student Vocabulary Mastery

In general, problems that occur in the actual are the discovery of instruments that have
not been tested for problem solving abilities. The aim of this research is to reveal the
content validity and interrater reliability of the instrument for evaluating the problem
solving abilities that have been prepared. The research method is used a quantitative
description by 3 expert judgments, they are experts in research and evaluation,
mathematics education experts, and mathematics teachers. The instrument was
developed in the form of an expert observation sheet with 3 aspects of assessment, they
are the aspect of content eligibility, construction aspects, and language aspects, which of
each aspect has 4 categories, which are very relevant, relevant, quite relevant, and highly
irrelevant. Data were analyzed using the Aiken's V formula to determine the level of
instrument validity and to determine the level of consistency / constancy between
assessors using Instraclass Correlation Coefficient (ICC) analysis with the help of SPSS
version 23.0. the results of analysis of the content validity of all items valued above 0.3
which means that all aspects assessed by experts are valid. Interrater reliability test using
ICC obtained a value of 0.516, which means that all aspects of the instrument for
evaluating problem solving abilities that have been rated have a level of consistency.
Thus, the instrument of problem-solving ability that has been tested for validity and
reliability can be used by educators to determine the level of students' problem solving
abilities appropriately.