Indeed, I feel that as long as it is a transactional investment, it is a psychological experiment, because all investment operations in the trading category are personal psychological battles.
We can relate it to the decision making thing. Either it is trading or investing, people have to involve the emotional balance for better results. But majority of the traders and investors dont have that grip to control their mind. For that reason, their decision making power become paralyzed and the results are totally damaging. This is a tremendous psychological experiment.