Gestalt psychology, founded by Max Wertheimer, Kurt Koffka, and Wolfgang Kohler, emphasizes the importance of understanding perception as an organized whole. Developed as a counter to Wilhelm Wundt's structuralism, this approach posits that our perceptions are more than just the sum of sensory parts; they are comprehensive wholes where the relationships between parts define the perception. The principle "The whole is greater than the sum of its parts" encapsulates this view, illustrating how humans perceive patterns and wholes in sensory information.

Originating in Germany and later introduced to the United States by its founders, Gestalt psychology faced challenges due to the rise of behaviorism and the displacement of its founders during the Nazi regime. Despite these obstacles, the core principles of Gestalt psychology have remained influential in various fields, particularly in cognitive psychology, which studies perception alongside learning, memory, and thought processes.

Gestalt psychology also underscores the significance of understanding sensory experiences as integrative wholes. This perspective has shown that elements such as melody in music are not merely individual notes but are perceived through their collective harmony, rhythm, and sequence. Such principles challenge earlier psychological models focused on breaking down experiences into basic elements, advocating instead for a holistic understanding of human perception.

Despite the initial resistance and challenges faced in the United States, Gestalt psychology's emphasis on wholes has contributed significantly to cognitive psychology, therapy (especially Gestalt therapy), and humanistic theory. Its principles continue to inform research on sensation, perception, and beyond, emphasizing the complexity and interconnectedness of human experiences.

Gestalt techniques, such as the Empty Chair technique, Here and Now, and I Take Responsibility, assist individuals in becoming more self-aware and resolving inner conflicts by concentrating on their present thoughts and feelings.