In the modern era, there has been two different approaches that Muslim psychologists have taken when trying to integrate Psychology and Islam. One could be summarized as the top-down approach where the existing foundation, made on principles of Western Psychology is then sprinkled over with some Islamic sayings, and finding how the Quran and ahadith may also illustrate and support examples in the approaches and theories that exist. This would be termed by some as the Islamization of Psychology.  Another approach could be called the bottom-up approach, where the actual foundation is built and approached with an Islamic paradigm, so from the onset of creating any theories and treatments, the person’s soul and fitrah is seen as an integral part of the human being’s well-being, this can be called Islamic Psychology. Please read further about this in this article by Dr. Malik Badri (or listen to the audio recording of the article):