"Although we also ran the learning task with high-dose ketamine, performance was inadequate and we will not report this part of the study further."
Yeah, I bet it did!
- From Corlett, et al, Frontal Responses During Learning Predict Vulnerability to the Psychotogenic Effects of Ketamine: Linking Cognition, Brain Activity, and Psychosis. Archives of General Psychiatry. 2006;63:611-621.