Olarte Sanchez, C MValencia-Torres, LCassaday, H JBradshaw, C MSzabadi, E2016-01-292016-01-292015-04Olarte Sanchez, C M, Valencia-Torres, L, Cassaday, H J, Bradshaw, C M & Szabadi, E 2015, 'Quantitative analysis of performance on a progressive-ratio schedule : effects of reinforcer type, food deprivation and acute treatment with Δ(9)-tetrahydrocannabinol (THC)', Behavioural Processes, vol. 113, pp. 122-131. https://doi.org/10.1016/j.beproc.2015.01.0140376-6357http://hdl.handle.net/2164/5456Copyright © 2015 Elsevier B.V. All rights reserved. This work was supported by the Schools of Community Health Sciences and Psychology, University of Nottingham. C.M. Olarte-Sánchez was supported by a U.K. Medical Research Council (MRC/DTA) scholarship. L. Valencia-Torres was supported by a scholarship from the National Science Council of Mexico (CONACYT). We are grateful to Mrs V.K. Bak and Mr R.W. Langley for skilled technical assistance.10862255engProgressive-ratio scheduleMathematical Principles of ReinforcementMathematical modelFood deprivationSucroseCorn oilΔ9-TetrahydrocannabinolIncentive valueRatQ ScienceMedical Research Council (MRC)QJournal article10.1016/j.beproc.2015.01.014113