Measurement through structural equations of the self-concept instrument in high-school students - Sabando-García, Angel Ramón; Jiménez-Bustillo, Oswaldo José; Llacsa-Puma, Lidia Janeth; Castro-Castillo, Graciela Josefina; Moreira-Choez, Jenniffer Sobeida; Rengifo-Lozano, Raúl Alberto (Frontiers in Education, 2025)