| Literature DB >> 13934336 |
Abstract
It was possible to distinguish three closely-related psychomotor stimulants, caffeine, methamphetamine, and methylphenidate, by means of two operant behavior procedures, fixed interval and fixed number. Under the fixed interval procedure, the percentage change in the number of R(B)s per reinforcement was significantly smaller with caffeine than with methamphetamine or methylphenidate (p < .001). Under the fixed number procedure, the percentage change was significantly smaller with methamphetamine than with caffeine or methylphenidate (p < .001). Thus, methylphenidate had a methamphetamine-like effect under fixed interval and a caffeine-like effect under fixed number.Entities:
Keywords: CAFFEINE; LEARNING; METHAMPHETAMINE; METHYLPHENIDATE
Mesh:
Substances:
Year: 1963 PMID: 13934336 PMCID: PMC1404449 DOI: 10.1901/jeab.1963.6-331
Source DB: PubMed Journal: J Exp Anal Behav ISSN: 0022-5002 Impact factor: 2.468