You're right, the human psyche is a difficult to test rigorously. However, mindfulness of the breath is simple can be done without priming the subjects to be "w

You're right, the human psyche is a difficult to test rigorously. However, mindfulness of the breath is simple can be done without priming the subjects to be "without judgment:" https://thebuddhistcentre.com/text/mindfulness-breathing https://thebuddhistcentre.com/text/mindfulness-breathing Controlling for this particular instance of framing seems doable.