Most of psychology doesn't survive past 20 years, the moment someone tries to replicate the results it fails. A lot of the fraud that is happening in medical science at the moment is in Psychology, their methods are unsound and they build entire diseases on foundations made of sand. They repeatedly get caught misrepresenting referenced papers by reviewers but the journals fail to enforce integrity and scientific principles.
People should be very sceptical of any psychological findings that are younger than about 30 years and ideally you want to have seen several replications and done with greater size, rigour and controls. Anything younger than this and certainly anything that hasn't yet been firmly replicated is on balance of probability going to turn out to be wrong or fraud.
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