Figure 1. Daily levels of salivary cortisol in the three periods of the academic year. The points represent individual participants; the horizontal bars show the median values. (AW = collection after -waking up BL = before lunch; AN = afternoon). P values obtained by the parametric t test, with Welch's correction for unequal variances

From

Assessment of Salivary Cortisol and Perceived Stress in Teachers

Regisnei Aparecido de Oliveira Silva, Lídia Andreu Guillo, Nestor Persio Alvim Agrícola

American Journal of Educational Research. 2018, 6(9), 1264-1270 doi:10.12691/education-6-9-4