This person was among those who pioneered psychological measurement. Among other contributions, he was possibly the first to popularize the notion that the heritability of psychological traits could be assessed by looking at identical and fraternal twins.

A. Francis Galton
B. Alfred Binet
C. Charles Spearman
D. Theodore Simon

This person was among those who pioneered psychological measurement. Among other contributions, he was possibly the first to popularize the notion that the heritability of psychological traits could be assessed by looking at identical and fraternal twins.

A. Francis Galton

Explanation:

Francis Galton was born in 1822. He had many professions. He was statitian, pstchologist, sociologist, etc. He created the concept of correlation and he apply stathistical methods to the study of human differences and inheritance of intelligence. As it is said in here he popularized the notion that the heritability of psychological traits could be assessed by looking at identical and fraternal twins. He published a book in 1869 called Hereditary Genius.