Is the below article a primary or secondary source. what are the key concepts, historical and contemporary relevance. is this source valid and reliable and what is the cultural relevance.

Zappala-Piemme, K., Sturman, E. D., Brannigan, G. G., & Brannigan, M. J. (2023). Building mental toughness: A middle school intervention to increase grit, locus of control, and academic performance. Psychology in the Schools, 60(8), 2975-2990. https://doi.org/10.1002/pits.22893