Cognitive psychology is a branch of psychology that studies mental processes such as thought, memory, problem solving, language, and perception. Cognitive psychology focuses on how people acquire, store, retrieve and use knowledge. It investigates the internal processes that control behavior and mental states such as beliefs, judgements, decisions, and attitudes. The primary goal of cognitive psychology is to understand how information is processed by people. It uses a variety of approaches to accomplish this, including psychometrics, cognitive neuroscience, computational modelling, and artificial intelligence. Cognitive psychologists collect, analyse and interpret data from laboratory experiments and field studies to understand the mechanisms by which humans process information. They apply this knowledge to real-world problems such as decision making, memory, problem solving, and language. Cognitive psychology has contributed to many areas of research, including artificial intelligence, neuroscience, communication, memory, learning, decision making, and psychiatry. It has been used to understand the biological basis of mental processes such as learning and memory, the development of language, and the mechanisms underlying thought and problem solving. It has also been used to help develop treatments for people with mental health disorders and to improve the design of educational programs and computer interfaces. Overall, cognitive psychology has had a tremendous impact on research in human behavior. It has helped us understand the mental processes involved in everyday life and has enabled us to develop interventions and treatments to improve people's lives. Cognitive psychology continues to drive advances in science and technology, providing a better understanding of human behavior and knowledge of how to use this insight to improve lives.