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…

Background/purpose: Few psychometric tests have been identified in the literature that analyze digital competencies in school-aged children. The Evaluation Test of Digital Competencies in Compulsory Education Students (ECODIES, Casillas-Martín et al., 2020) is considered one of the most robust for its measurement. The aim of the study was to…

The purpose of this study is to develop and validate based on construct validity and sampling validity on a self-confidence scale that can measure student self-confidence at the high school level by adapting self-confidence indicators and adjusting indicators according to the character of students in Indonesia with an age range of 16-18 years. A…

The aim of this study was to adapt the Positive and Negative Affect Scale for Children (PANAS-C) developed by Laurent et al. into Turkish and to examine its validity and reliability on high school adolescents. The data of the study were analyzed with four different study groups. The first study group consisted of 414 high school adolescents, 262…

The present study has aimed to develop and validate a protein concept inventory (PCI) consisting of 25 multiple-choice (MC) questions to assess students' understanding of protein, which is a fundamental concept across different biology disciplines. The development process of the PCI involved a literature review to identify protein-related content,…

Career aspirations of high school students is a significant motivational force for learning engagement. However, validated methods for probing their career aspirations remain unestablished. Study 1 used 1455 high school students to develop a career aspirations questionnaire (CAQ). The CAQ was developed through item generation, pretesting,…

Anger is a topic that requires intervention from teachers, counsellors, psychologists, parents, and all communities. The expressions of anger are subjective and sometimes hard to identify. Thus, anger should be measured more objectively, while the expressions need to be examined closely. The purpose of this study is to provide valid confirmation…

This study aimed to evaluate the psychometric properties and gather evidence supporting the validity of scores from a traditional Chinese version of the Claremont Purpose Scale (TC-CPS) among Taiwanese adolescents. The TC-CPS, measuring meaningfulness, goal directedness, and beyond-the-self orientation, was administered to 233 high school and 445…

Technological mediation has gained relevance in teaching mathematics. Its usefulness and impact depend, to a great extent, on how students approach the learning of the discipline. Two independent instrumental studies were conducted to analyze the psychometric properties of the Spanish version of the Mathematics and Technology Attitudes Scale…

Background/purpose: This study aimed to investigate the differences among the equations used in estimating the reliability coefficient using the half-split method. These equations demonstrate Spearman-Brown's, Rulon's, Guttman's, Mosier's, Flanagan's, and Horst's. Materials/methods: The study instrument was a 43-item scale for evaluating the…

The primary objectives of this study were to translate and assess the psychometric properties of the Principal Instructional Leadership Scale (PILS) within an Iranian population. The translation and cross-cultural adaptation process involved five stages: forward translation, translation synthesis, backward translation, expert committee review, and…

This study aims to develop a valid and reliable achievement test in accordance with the content framework of the 9th-grade Biology Course Curriculum published within the scope of the Turkish Century Maarif Model on the subject of "Organic Matter". The screening method was used for this purpose. The sample of the study consists of 258…

The research developed and validated EKSAI (Epistemic Knowledge Science Assessment Instrument), an assessment tool for epistemic knowledge in science education. The background is that 21st-century challenges demand a transformation in science education, with a focus on understanding how scientific knowledge is developed and evaluated, which is…

The purpose of this study is twofold: (1) to develop and validate a five-tier diagnostic instrument for respiration and photosynthesis; (2) to uncover senior high school students' genuine misconceptions in Mainland China and explore the characteristics of their sources and formation mechanisms. To achieve these aims, a five-tier diagnostic…

The aim of this study was to develop a valid and reliable measurement instrument to find out adolescents' relative deprivation levels and to determine the statistical characteristics of the instrument. The Relative Deprivation Scale-Adolescent Form was prepared and applied to 586 adolescents within the scope of the study. Exploratory Factor…