The correct answer is George Trumbull
It was influential in the establishment of experimental psychology in the United States. Educated for the ministry, Ladd was pastor of a Congregational church in Milwaukee, Wisconsin, for eight years before becoming a professor of philosophy at Bowdoin College, Brunswick, Maine (1879-1881). During these years, I started to investigate the relationship between the nervous system and mental phenomena in the first study of experimental psychology in the United States and Canada. His main work is Elements of physiological psychology.
