> It can not predict what exactly is going to happen, only how likely each outcome would be.
Yeah but the key difference is that QM is a mathematically solid theory starting from a couple basic laws to yield predictions with p-values of 0 (for all intents and purposes anyway). Also note that there are non-probabilistic measurements in QM, be they measurements of aggregate behavior or just pure states [1]. In that respect, QM and most physical sciences really are miles ahead of psychology (though I don't think that's reason to discredit the latter, as it has obvious empirical merit).
If I may be a bit bolder still, I'd argue that it's not merely a quantitative difference. As pointed out by many other comments, psychology completely lacks any sort of unifying framework, except perhaps for small clusters of thematically similar phenomena. A collection of empirical facts does not a scientific theory make, or--taken to the cheeky extreme--"All science is either physics or stamp collecting" [2].
Yeah but the key difference is that QM is a mathematically solid theory starting from a couple basic laws to yield predictions with p-values of 0 (for all intents and purposes anyway). Also note that there are non-probabilistic measurements in QM, be they measurements of aggregate behavior or just pure states [1]. In that respect, QM and most physical sciences really are miles ahead of psychology (though I don't think that's reason to discredit the latter, as it has obvious empirical merit).
If I may be a bit bolder still, I'd argue that it's not merely a quantitative difference. As pointed out by many other comments, psychology completely lacks any sort of unifying framework, except perhaps for small clusters of thematically similar phenomena. A collection of empirical facts does not a scientific theory make, or--taken to the cheeky extreme--"All science is either physics or stamp collecting" [2].
[1] https://en.wikipedia.org/wiki/Quantum_state#Pure_states
[2] https://en.wikiquote.org/wiki/Ernest_Rutherford#Quotes