10.2190/6BV9-EFK6-UHT1-MMN9 6BV9EFK6UHT1MMN9 5 Increasing Litter Depositing Through the Use of Positive Conditioned Reinforcement 173 180 20020509 20020509 20020509 20020509 6BV9EFK6UHT1MMN9.pdf http://baywood.metapress.com/link.asp?target=contribution&id=6BV9EFK6UHT1MMN9 2 Jeff Corey Charles D. Hamad Department of Psychology, C. W. Post College Department of Human Development, University of Kansas When a card saying "Thank You for Disposing of Your Trash" was given contingent upon tray returns in a college cafeteria, tray returns increased above baseline (90% from 68%). Reversal of the contingency resulted in a drop in returns (74%) while reinstatement of the contingency increased the rate (88%). Replacement of the persons who handed out the cards with a sign saying "Thank You for Disposing of Your Trash" and <i>ad lib.</i> "Thank You" cards resulted in an intermediate rate of returns (80%). R. L. Burgess, R. N. Clark, and J. C. Hendee, An Experimental Analysis of Antilitter Procedures, <i>Journal of Applied Behavior Analysis, 4</i>, pp. 71-75, 1971. R. N. Clark, R. L. Burgess, and J. C. Hendee, The Development of Anti-litter Behavior in a Forest Campground, <i>Journal of Applied Behavior Analysis, 5</i>, pp. 1-5, 1972. R. Kohlenburg and T. Phillips, Reinforcement and the Rate of Litter Depositing, <i>Journal of Applied Behavior Analysis, 6</i>, pp. 391-396, 1973. R. B. Powers, G. Osborne, and E. G. Anderson, Positive Reinforcement of Litter Removal in the Natural Environment, <i>Journal of Applied Behavior Analysis, 6</i>, pp. 579-586, 1973. C. Chapman and T. R. Risley, Anti-litter Procedures in an Urban High Density Area, <i>Journal of Applied Behavior Analysis, 7</i>, pp. 377-384, 1974. S. C. Hayes, V. S. Johnson, and J. D. Cone, The Marked Item Technique: A Practical Procedure for Litter Control, <i>Journal of Applied Behavior Analysis, 8</i>, pp. 381-386, 1975. R. L. Burgess, R. N. Clark, and J. C. Hendee, An Experimental Analysis of Anti-litter Procedures, <i>Journal of Applied Behavior Analysis, 4</i>, pp. 71-75, 1971. R. N. Clark, R. L. Burgess, and J. C. Hendee, The Development of Anti-litter Behavior in a Forest Campground, <i>Journal of Applied Behavior Analysis, 5</i>, pp. 1-5, 1972. R. Kohlenburg and T. Phillips, Reinforcement and the Rate of Litter Depositing, <i>Journal of Applied Behavior Analysis, 6</i>, pp. 391-396, 1973. R. B. Powers, G. Osborne, and E. G. Anderson, Positive Reinforcement of Litter Removal in the Natural Environment, <i>Journal of Applied Behavior Analysis, 6</i>, pp. 579-586, 1973. C. Chapman and T. R. Risley, Anti-litter Procedures in an Urban High Density Area, <i>Journal of Applied Behavior Analysis, 7</i>, pp. 377-384, 1974. S. C. Hayes, V. S. Johnson, and J. D. Cone, The Marked Item Technique: A Practical Procedure for Litter Control, <i>Journal of Applied Behavior Analysis, 8</i>, pp. 381-386, 1975. R. N. Clark, R. L. Burgess, and J. C. Hendee, The Development of Anti-litter Behaviors in a Forest Campground, <i>Journal of Applied Behavior Analysis, 5</i>, pp. 1-5, 1972. R. Kohlenburg and T. Phillips, Reinforcement and the Rate of Litter Depositing, <i>Journal of Applied Behavior Analysis, 6</i>, pp. 391-396, 1973. E. S. Geller, J. L. Chaffee, and R. E. Ingram, Prompting Paper Recycling on a University Campus, <i>Journal of Environmental Systems, 5</i>, pp. 39-57, 1975. R. Kohlenburg and T. Phillips, Reinforcement and the Rate of Litter Depositing, <i>Journal of Applied Behavior Analysis, 6</i>, pp. 391-396, 1973. E. S. Geller, J. C. Farris, and D. S. Post, Prompting a Consumer Behavior for Pollution Control, <i>Journal of Applied Behavior Analysis, 6</i>, pp. 367-376, 1973. E. S. Geller, Increasing Desired Waste Disposals with Instructions, <i>Man-Environment Systems, 5</i>, pp. 125-128, 1975. E. S. Geller, Prompting Anti-litter Behaviors, <i>Proceedings of the 81st Annual Convention of the American Psychological Association, 8</i>, pp. 901-902, 1973.