Intrinsic motivation in sport.
Vallerand
R J
RJ
Deci
E L
EL
Ryan
R M
RM
D003071:Cognition; D005260:Female; D006801:Humans; D008297:Male; D009042:Motivation / Q000502:physiology*; D010465:Perception; D012944:Social Support; D013177:Sports