Phenomenology / Franz Brentano / Edmund Husserl / Gestalt Psychology / School of Brentano / History Of Psychology / Perception (Psychology) / Ernst Mach / Christian von Ehrenfels / Gestalt Theory / Carl Stumpf / History of Philosophy / History Of Psychology / Perception (Psychology) / Ernst Mach / Christian von Ehrenfels / Gestalt Theory / Carl Stumpf / History of Philosophy