Bunch, M. E., & Mueller, C. G. (1941). The influence of metrazol upon maze learning ability. Journal of Comparative Psychology, 32(3), 569-574.
http://dx.doi.org/10.1037/h0061797
51 rats, 52 days old, received daily metrazol injections for 24 days. 4 days after this period they were started on a rather difficult water maze. A control group of litter mates mastered the maze at the same time. No significant differences in trials, errors, and times were found between the 2 groups. (PsycINFO Database Record (c) 2016 APA, all rights reserved)