Sy, Jolene R.Borrero, John C.2020-04-172020-04-172009-12Sy, Jolene R.; Borrero, John C.; Parametric analysis of presession exposure to edible and nonedible stimuli; Journal of Applied Behavior Analysis 42(4): 833–837 (2009); https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2790942/https://dx.doi.org/10.1901%2Fjaba.2009.42-833http://hdl.handle.net/11603/18123We assessed the effects of individually defined small, medium, and large periods of presession access to edible and nonedible reinforcers on response rates during sessions in which responding produced access to identical reinforcers. Any presession access to an edible reinforcer decreased response rates for 1 participant, and small and medium periods of presession access to nonedible reinforcers resulted in similar or increased response rates for 2 participants.5 pagesen-USThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.establishing operationsparametric evaluationpresession accessreinforcer efficacyText