Measuring students’ emotions in the early years: The achievement emotions questionnaire-elementary school (AEQ-ES).

Lichtenfeld, S., Pekrun, R., Stupnisky, R. H., Reiss, K., & Murayama, K. (2012). Measuring students' emotions in the early years: The achievement emotions questionnaire-elementary school (AEQ-ES). Learning and Individual Differences, 22(2), 190-201.    https://doi.org/10.1016/j.lindif.2011.04.009    Request PDF Article