The purpose of this study was to conduct a content validity analysis of the Teacher Impression Scale (TIS), which is an observer rating scale designed to assess preschool children peer social competence. The TIS was originally developed in the 1980s and used in research in the 1990s-2010s. The was the first step in an instrument development…

Mathematical abstraction skills are fundamental for advanced reasoning and problem-solving, yet assessing these skills in senior high school students poses challenges due to limited validated instruments. This study aims to develop and validate a test instrument for measuring mathematical abstraction skills in Indonesian high school students. The…

This paper presents the findings of a study that intended to seek the content validity (CV) evidence of an instrument to measure the reading ability of university students in Sri Lanka. The reading passages and items were adapted from CEFR aligned Learning Resource Network (LRN) materials. The items were designed based on the cognitive processing…

The teaching of English as a foreign language in Indonesia has a long history, and it is always important to ask whether the assessment of the students' language skills has been valid and reliable. A screening of many articles in several prominent databases reveal that a number of evaluation studies have been done by Indonesian scholars in the…

This research that aimed to (1) produce instruments that were feasible to measure the ability to solve physics problems and nationalism, and (2) determine the quality of instruments that have been developed. This research was conducted through four stages, namely the design, preparation of tests, test trials, and preparation of valid instruments.…