Effects of reward on intrinsic motivation--negative, neutral and positive: comment on Deci, Koestner, and Ryan (1999)
Eisenberger
R
R
Department of Psychology, University of Delaware, Newark 19716, USA. eisenber@udel.edu
Pierce
W D
WD
Cameron
J
J
D001521:Behavior Therapy; D002755:Choice Behavior; D003216:Conditioning, Operant; D006801:Humans; D007389:Internal-External Control; D015201:Meta-Analysis as Topic; D009042:Motivation; D012201:Reward