00535nam a2200133Ia 4500001000500000005001700005008004100022020001500063100001700078245015300095260007900248300002500327650004900352809820261006004055.0120911s9999    xx            000 0 und d  a0618001816  aKohn, Alfie.  aPunished by rewards : the trouble with gold stars, incentive plans, A?s, praise, and other bribes / Alfie Kohn ; with a new afterword by the author.  bBoston : Houghton Mifflin Co., 1993.aBoston : Houghton Mifflin Co., 1993.  axiv, 431 p. ; 23 cm.  aReward (Psychology), Motivation (Psychology)