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