Title: Effects of contingent and non-contingent reinforcement on children's academic performance
Description: <a href="http://uf.catalog.fcla.edu/uf.jsp?st=UF000580636&ix=nu&I=0&V=D" rel="nofollow">http://uf.catalog.fcla.edu/uf.jsp?st=UF000580636&ix=nu&I=0&V=D</a>
Subjects: Reinforcement (Psychology.