Math and physics are intertwined, the practice of physics is used to learn more about math.  Math describes the principals that govern the entire universe, including physics, biology, social interactions, economics, etc...


https://en.wikipedia.org/wiki/Relationship_between_mathematics_and_physics


Psychology is more of a social studies than a science and requires a different mindset than a true scientist that seeks objective truth through data.

https://philosophynow.org/issues/74/Is_Psychology_Science