What area of psychology did Francis Galton primarily influence?

Francis Galton made significant contributions to the statistical evaluation in psychology, which is why this choice is the most accurate. He was a pioneer in applying statistical methods to the study of human differences and heredity. His work on regression toward the mean and the development of correlation coefficients laid the groundwork for later developments in psychometrics and statistics within psychology.

Galton's emphasis on quantifying traits and abilities has had a lasting impact on how psychological research is conducted, particularly in areas such as intelligence testing and the nature of human behavior. This focus on measurement and analysis set the stage for experimental designs and the application of statistical techniques in psychological research, firmly establishing the importance of data in understanding psychological phenomena.