Phenomenological psychology unfolds Husserl's attempt to free psychology from its naturalistic reductions and to re-establish it as a rigorous science of the essence of consciousness. Starting from intentionality, perception, memory, empathy, and consciousness of time, the text leads into an analysis of mental acts that does not reject empirical observation but methodically deepens it through phenomenological reduction. Stylistically, the work combines lecture-like clarity with conceptual rigor and stands at the transition between descriptive psychology and transcendental phenomenology. Edmund Husserl, born in 1859 and originally a mathematician, developed a philosophy under the influence of Franz Brentano that radically re-examined the meaning of knowledge, science, and experience. After the logical investigations and ideas for a pure phenomenology, he increasingly sought a foundation for the human and natural sciences. Phenomenological psychology demonstrates how his engagement with psychologism, consciousness analysis, and the scientific crisis led to a methodological new beginning. This book is recommended for readers who wish to understand Husserl's thought not only historically but systematically. It is particularly valuable for philosophy, psychology, cognitive science, and hermeneutics, as it shows how subjective experience can be taken seriously in a scientific context without reducing it to mere facts.