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Cognitive psychology studies human mental processes such as thinking, understanding, decision-making, and problem-solving. Rather than just observing behavior, cognitive psychologists explore how people perceive information, remember facts, and solve problems. This approach examines internal mental processes that drive human cognition and behavior.

The cognitive revolution shifted psychology's focus from observable behavior to exploring the human mind. Previously, behaviorism dominated the field and largely ignored mental processes. The cognitive revolution renewed emphasis on understanding how people think and process information, arguing this is crucial for explaining behavior and establishing psychology as a science.

Jean Piaget discovered that children perceive the world differently from adults. For example, children often believe the amount of water changes when poured into a taller glass because they focus on height rather than actual volume. This pioneering work demonstrated how children's cognitive development and thinking evolve distinctly from adult cognition.

Cognitive psychologists use advanced brain imaging techniques like MRI and fMRI to study how brain activities support cognitive functions such as perception and memory. These neuroimaging tools allow researchers to visualize and comprehend brain functions associated with cognitive processes, bridging cognitive psychology and neuroscience.

Cognitive psychology has profoundly influenced various disciplines including linguistics, computer science, and neuroscience. This interdisciplinary approach promotes a comprehensive understanding of the mind and behavior. The field's emphasis on mental processes and information processing has shaped research methods and theoretical frameworks across multiple scientific domains.

Cognitive psychologists study practical mental processes like solving math problems, recognizing a friend's face in a crowded room, or deciding whether to carry an umbrella on a cloudy day. These examples illustrate how cognition involves perception, decision-making, and problem-solving in daily situations, demonstrating the relevance of cognitive psychology to human experience.

Key figures including Jean Piaget, Ulric Neisser, and George Miller played pivotal roles in advancing cognitive psychology. Neisser, regarded as the father of cognitive psychology, defined the field's scope. Miller made significant contributions to understanding memory and introduced the concept of the magical number seven in information processing.