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Christoph
Sigwart

(Options)

Ernst
Meumann

University of Hamburg (Neurotree)

Heinrich
Maier

(EduTree)

Erich
Rothacker

University of Heidelberg (EduTree)

Hermann
Ebbinghaus

Universität Berlin (Neurotree)

James Rowland
Angell

Chicago (Neurotree)

William Lewis
Stern

University of Hamburg (Neurotree)

Christoph SigwartX