Because it is "trivially" easier to do a better experiment in Physics (money aside, of course) Psychology will always have ethic, sample size and cultural/time

Because it is "trivially" easier to do a better experiment in Physics (money aside, of course) Psychology will always have ethic, sample size and cultural/time/space constraints. Your "psychology experiment" done with Mechanical Turk is more an exercise on sampling bias than anything else And they keep running into "replication failures" because they fail to account for that and try to chase the illusion that it is possible to have a perfect controlled environment in psych. They can't, and they're only fooling themselves they can.