Different scholars and theorists over time have made their opinions vocal on this subject matter, and there are a few specific scholars and analysis models that are of particular importance and influence. Critical thinking is one issue that is included within the form of human thought which is considered to be of particular importance as well, and again there are many different opinions and explanations that are put forth onto this matter as well. Critical thinking does, after all, manifest itself in the arts, humanities, and sciences, and all of this is truly crucial to the subject of human thought overall. Reflective practice is a relative issue here, and there are basically two different dimensions to reflective practice, and two models in particular which are involved – the Johns’ model of reflective practice, and the Schon’s model of reflective practice. By discussing all of this as well as any and all other key and related issues, we will be able to come to a much more informed and knowledgeable understanding on the subject of human thought as a whole, as well as on the matters of critical thinking and reflective practice and how these two subjects are related to the psychological aspect of human thought. This is what will be dissertated in the following.Human thought is a psychological issue which is incredibly complex, and to which many different subjects are contained within. In more recent years, a new discipline has arisen, which argues that human behavior can be understood in terms of evolutionary processes, and critical thinking is considered as being an incredibly intricate and significant part of human thought overall. In fact, critical thinking is something which is considered as having an on-going concern with the problems that are inherent in human thinking, and It includes, but is not exhausted by the mental process of analyzing or evaluating information, particularly statements or propositions that people have offered as true.