`It`s up to you`: Experimentally manipulated autonomy support for prosocial behavior improves well-being in two cultures over six weeks
Nelson, SK (Nelson, S. Katheri, Della Porta, MD (Della Porta,, Bao, KJ (Bao, Katherine Jacob, Lee, HC (Lee, HyunJung Crysta, Choi, I (Choi, Incheol), Lyubomirsky, S (Lyubomirsky,
JOURNAL OF POSITIVE PSYCHOLOGY, 201501