If you are thinking that Psychology uses a lot of references like existentialism, phenomenology, epistemology, ontology, unconscious, preconscious, logical positivism, and reductionism, then reading the philosophy behind these ideas will explain the terms in context of the psychology reading.
A good source for learning about psychology and philosophy is the Stanford Encyclopedia of Philosophy. A link to this site is available below. I chose to feature William James on this site because he has some foundational topics in psychology like reality, truth, and consciousness that are important for students to learn.
Stanford Encyclopedia of Philosophy site:
http://plato.stanford.edu/entries/james/
A good source for learning about psychology and philosophy is the Stanford Encyclopedia of Philosophy. A link to this site is available below. I chose to feature William James on this site because he has some foundational topics in psychology like reality, truth, and consciousness that are important for students to learn.
Stanford Encyclopedia of Philosophy site:
http://plato.stanford.edu/entries/james/