I'm reasonably certain that if someone slipped me something now, thanks to youthful experimentation I'd at least catch on to what was going on pretty quickly, but I can't imagine experiencing that with literally no frame of reference.
How are you controlling for which compound has which effects?
EDIT: Leaving aside the whole, you know, "Dosing your unsuspecting coworkers with acid" thing. Not very cool. Or legal (beyond the drug, itself).
Second of all LSD, has a bit of a stimulant "excitable" effect. So you might want to give them Decaf to compensate. You're right that it's a confounding variable though, and there's a good chance that people like me would be less productive because of the decaf, especially if the LSD dose was too small. https://erowid.org/chemicals/lsd/lsd_effects.shtml
0) https://www.vice.com/en_us/article/the-oral-history-of-the-b...
One group gets decaf coffee with an LSD microdose
One group gets normal coffee.
Waltz in with coffee and donuts Dexter style each morning.
Monitor their output and mood for a month or so.