Correct Answer - Option 2 : Galton
Galton was the founder of the field of Differential Psychology, which concerns itself with psychological differences between people, rather than on common traits.
- His influential study Hereditary Genius (1869) was the first systematic attempt to investigate the effect of heredity on intellectual abilities, and was notable for its use of the bell-shaped Normal Distribution, then called the "Law of Errors", to describe differences in intellectual ability.
- Later Galton went on to suggest the use of twin studies to disentangle nature from nurture, by comparing identical twins to fraternal twins.
- His psychological studies also embraced mental differences in visualization, and he was the first to identify and study "number forms", now called "synesthesia".
- He also invented the word-association test and investigated the operations of the subconscious mind.
Hence, we can conclude that the book, Hereditary Genius was written by F. Galton.
