Jean Piaget's Theories Of Cognitive Development

Name of Psychologist
Jean Piaget
Field of Psychology
Developmental Psychology
Main Contributions
Piaget’s theory of cognitive development is his theory that he theorised that the person’s childhood plays a major role in his or her development as a person. In his theory there are 4 stages, Jean Piaget was inspired by that theory when he was observing his nephew and his daughter, he concluded that children are not less smart than the adults, but they think differently compared to the adults.

Name of Psychologist
Sigmund Freud
Field of Psychology
Psychotherapy
Main Contributions
Freud created and developed psychoanalysis which is an important method for psychotherapy and treating patients with mental issues. Psychoanalysis still influences
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The theory also states that the emotion is felt, and the environment is a cause for physiological arousal.

Name of Psychologist
Daniel Kahneman
Field of Psychology
Economic Psychology
Main Contributions
Kahneman made a this theory called "Prospect Theory", where it states that people choose between risk and probability, and it states that a person makes decision based on the loss and gain instead of the outcome. The theory states that there are two stages: Editing and Evaluation.

Name of Psychologist
Hans-Werner Gessman
Field of Psychology
Humanistic Psychology
Main Contributions
Gessman developed a new form of psychodrama and it was humanistic psychodrama, and it became a big part of Humanistic Psychology. He founded an institute where they train more than 1500 psychotherapists.

Name of Psychologist
Brenda Milner
Field of Psychology
Neuropsychology
Main
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This hierarchy is one of the most famous in Psychology.

Name of Psychologist
Gordon Allport
Field of Psychology
Personality Psychology
Main Contributions
Allport was focusing on the study of personality, he was one of the first to study that matter. His theory of personality includes personality traits, and it’s divided to three categories: Cardinal, Central, and Secondary. His work has still influence on psychology.

Name of Psychologist
Erik Erikson
Field of Psychology
Developmental Psychology
Main Contributions
His theory which states eight stages which is called: Erikson’s stages of psychosocial development. Each stage is continued by the previous stage and those stages are challenges that must be completed to proceed to another

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