Question: How do you think psychology can be applied to other fields e.g law, and how is it beneficial?

Nathan Hook answered on 8 Nov 2018:

Psychology touches almost every field, because every field involves people (or other beings with minds).

In your example of law, there is whole sub-discipline called forensic psychology. For example, this studies how memory and forgetting functions, to understand how reliable a witness. Another example is studying bias; for example it’s been found that attractive people get lesser sentences, unless they used their attractiveness to commit the crime.

It also applies to understanding and creating art – art is after all simply a creation of human minds. The older parts of psychology (such as the world of Freud) are now often taught more in humanities than psychology itself (for example, using Freud to understand the work of Shakespeare).