Wilhelm Wundt is considered the father of experimental psychology because he founded the first psychology laboratory in Leipzig, Germany, in 1879.

Wilhelm Wundt's research focused on the structure of consciousness, which he believed could be studied through introspection.

Mary Whiton Calkins was the first woman to receive a doctorate in psychology, which she earned from Harvard University in 1895.

Edward Titchener founded the school of psychology known as structuralism, which focused on analyzing the structure of consciousness.

William James is considered the founder of functionalism, a school of psychology that focused on the function of consciousness in helping people adapt to their environment.

Behaviorism, founded by John B. Watson, focused on the study of observable behavior, rather than mental processes.

Max Wertheimer is considered the founder of Gestalt psychology, a school of psychology that focused on the study of perceptual organization.

The main principle of Gestalt psychology is that the whole is greater than the sum of its parts, meaning that the properties of a whole object cannot be understood by simply adding up the properties of its individual parts.

Ulric Neisser is considered the founder of cognitive psychology, a school of psychology that focuses on the study of mental processes, such as perception, attention, memory, and problem-solving.

Cognitive psychology focuses on the study of mental processes, such as perception, attention, memory, and problem-solving.

Abraham Maslow is considered the founder of humanistic psychology, a school of psychology that focuses on the study of human potential and growth.

Humanistic psychology focuses on the study of human potential and growth, and emphasizes the importance of free will, personal responsibility, and self-actualization.

Martin Seligman is considered the founder of positive psychology, a school of psychology that focuses on the study of human strengths and well-being.

Positive psychology focuses on the study of human strengths and well-being, and emphasizes the importance of positive emotions, resilience, and optimism.

Cognitive psychology is currently the most popular school of psychology, and it focuses on the study of mental processes, such as perception, attention, memory, and problem-solving.