That would be Structuralism.
Here are some of psychology schools of thought with definitions:
Structuralism is using introspection – inspecting oneself to make sense of one’s experiences.
Functionalism – understanding the reason behind the psychological capacities of animals and humans.
Psychodynamic focuses on unconscious thoughts and feelings, as well as childhood experiences.
Behaviorism – studying the behavior to objectively quantify the mind.
Cognitive – studying of mental processes such as perception, thinking, memory and judgement
Social-cultural – how situations and society affect the people’s thinking and feeling.