The closest thing to a sugar pill available is known-bad advice,
One example of a control group in a psychological study (can’t find reference): researchers compared freudian psychoanalysis to merely sitting there and listening.
sugar has physiological effects, so you can’t really assume a sugar pill is neutral with no side-effects
One example of a control group in a psychological study (can’t find reference): researchers compared freudian psychoanalysis to merely sitting there and listening.
sugar has physiological effects, so you can’t really assume a sugar pill is neutral with no side-effects
And when you are testing the psychological effects of urea based salts you can’t really assume lithium salts are neutral with no side-effects.