Canna~Fangled Abstracts Quantitative analysis of performance on a progressive-ratio schedule: effects of reinforcer type, food deprivation and acute treatment with Δ9-tetrahydrocannabinol (THC). 2015 Jan 28. pii: S0376-6357(15)00042-X. doi: 10.1016/j.beproc.2015.01.014. Olarte-Sánchez CM1, Valencia-Torres L2, Cassaday HJ3, Bradshaw CM4, Szabadi E5. Author information…Freedom WaresJanuary 28, 2015