Merino, LauraMartínez Pampliega, Ana2024-11-202024-11-202022Merino, L., & Martínez-Pampliega, A. (2022). Development and psychometric properties of a new observational coding system for sibling interactions. International Journal of Social Research Methodology, 25(3), 293-314. https://doi.org/10.1080/13645579.2021.18839301364-557910.1080/13645579.2021.1883930http://hdl.handle.net/20.500.14454/2030The main aim of this study is to build a new observational coding system for sibling interactions (Sistema de Codificación de Interacciones entre Hermanos–SCIH) and to analyze its psychometric properties and validity. First, this study offers the first Spanish adaptation of a self-report questionnaire to measure sibling relationships that replicate the original structure of the SRQ in a sample of 469 children and adolescents. Then, the study focused on the development of the SCIH, which analyzes siblings’ relationships by means of a system of live observation and it examined five dimensions: Warmth, Conflict, Dominance, Aggression, and Support in a sample of 50 pairs of siblings. The main contribution of this study is the description of the development of a new observational coding system for siblings and the confirmation of its inter-rater reliability. Limitations and future lines are discussed.eng© 2021 Informa UK Limited, trading as Taylor & Francis GroupConvergent validityObservational systemPsychometric propertiesSelf-report questionnaireSiblingsjournal article2024-11-201464-5300