The overwhelming majority doesn't survive 20 years, when someone tries to replicate it the results disappears. Some of it takes longer than that but it almost a

The overwhelming majority doesn't survive 20 years, when someone tries to replicate it the results disappears. Some of it takes longer than that but it almost all falls eventually. Its just not a rigorous field and alas that doesn't stop the newspapers printing sensational headlines about it claiming effects that are a bit of a stretch given how they actually studied the participants.