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Composer, music theorist, artist, and philosopher. A pioneer of indeterminacy in music, electroacoustic music, and non-standard use of musical instruments.

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Psychologist known for his 8 stages of psychosocial development. They are not as attached to age as Piaget, but rather stages of maturity that is developed both by experiences and genetics.

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Came up with the Growth Mindset vs. Fixed Mindset. Students in FM think they cannot succeed beyond present capability. Teachers need to encourage GM, especially in girls!

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Child development psychologist, known for "radical behaviorism" and his belief that free will was a myth or illusion.

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of educational objectives and to the theory of mastery learning.

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French psychologist - invented the IQ test. It was and is used to varying degrees, but has been criticized for not measuring the full spectrum of types of intelligences.

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Psychologist came up with a 4 stage Theory of Cognitive Development. While some praised the stages, he was criticized because some considered them to be too static. Some children may not reach stages at the same age.