Differential Psychology
· Hereditary Genius (1869) complex not simple mental operations
· Inquiries into Human Faculty (1883) · `Individual psychology'
· `General mental ability' discover processes that vary between people
heritable how do they covary across individuals?
basis in simple functions (discrimination, head · Work with Henri to devise test of mental functions
size, reaction time) to study differences between people on complex
normal distribution mental functions
· Revival of his intelligence ideas
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