Reciprocal relationships between State gratitude and high- and low-arousal positive affects in daily life: A time-lagged ecological assessment study. - Jans-Beken, Lilian; Jacobs, Nele; Janssens, Mayke; Peeters, Sanne; Reijnders, Jennifer; Lechner, Lilian; Lataster, Johan (Journal of Positive Psychology, 2019)