On Galton's Change From .Reversion. to .Regression.

Galton's first work on regression probably led him to think of it as a unidirectional, genetic process, which he called .reversion.. A subsequent experiment on family heights made him realize that the phenomenon was symmetric and nongenetic. Galton then abandoned .reversion. in favor of .regression.. Final confirmation was provided through Dickson's mathematical analysis and Galton's examination of height data on brothers.