Galton's work shifted the focus of psychology from general laws of behavior to the study of individual differences. He emphasized the importance of measuring and quantifying human traits and abilities, paving the way for the development of psychological testing.

Galton's Anthropometric Laboratory provided a platform for collecting data on various human characteristics, including sensory acuity, reaction time, and physical measurements. This marked an early attempt at developing standardized mental tests to assess individual differences in cognitive abilities.

Galton's contributions to statistics, including correlation and regression, provided psychologists with powerful tools for analyzing data and understanding relationships between different variables. These methods became essential for conducting research on human behavior and individual differences.

Galton's work inspired subsequent generations of psychologists, including Karl Pearson, Charles Spearman, and L.L. Thurstone, who further developed statistical methods and applied them to the study of intelligence, personality, and other psychological traits.