Nugraha, Adithia Sandy, and Indra Maulana. 2026. “Gadget Use Intensity and Learning Concentration Among Junior High School Students: The Mediating Role of Learning Motivation”. Journal of Mathematics Instruction, Social Research and Opinion 5 (3). Bandung, Indonesia:2527–2538. https://doi.org/10.58421/misro.v5i3.2142.