Neither the participants nor the experimenters know who received which treatment—so all the participants are told they are attending a Landmark Forum, the experimenters have two addresses to hand out the participants, but they don’t know which is the real Landmark Forum and which is the carefully-crafted applause lights / horoscope-style statements that apply to everyone / empty words / positive-thinking drivel lecture.
Probably one of the experimenters would have to find a third-party motivational speaker of some sort, work out the content-free speech, and then excuse themselves from the rest of the experiment.
Neither the participants nor the experimenters know who received which treatment—so all the participants are told they are attending a Landmark Forum, the experimenters have two addresses to hand out the participants, but they don’t know which is the real Landmark Forum and which is the carefully-crafted applause lights / horoscope-style statements that apply to everyone / empty words / positive-thinking drivel lecture.
Probably one of the experimenters would have to find a third-party motivational speaker of some sort, work out the content-free speech, and then excuse themselves from the rest of the experiment.