Franz
Brentano

Vienna University




Carl
Stumpf

Universität Berlin


Benno
Erdmann

Universität Berlin


Max
Planck

Universität Berlin (Physics Tree)


Walther
Nernst

Universität Berlin (Chemistry Tree)


Carl
Stumpf

Universität Berlin






Carl
Stumpf

Universität Berlin


Oswald
Külpe

University of Wurzburg


Friedrich
Schumann

Goethe-Universität Frankfurt (PsychTree)


Max
Wertheimer

New School for Social Research




Walter Bowers
Pillsbury

University of Michigan


John Frederick
Shepard

University of Michigan


Charles Sanders
Peirce

Johns Hopkins (Philosophy Tree)




Joseph
Jastrow

Johns Hopkins






V. A. C.
Henmon

UW Madison


Carl Emil
Seashore

University of Iowa


Daniel
Starch

UW Madison (PsychTree)








Carl Emil
Seashore

University of Iowa




Henry
Garrett

(PsychTree)


Max
Hertzman

CCNY (PsychTree)






Kenneth W.
Spence

Iowa University


Carl
Stumpf

Universität Berlin




Max
Wertheimer

New School for Social Research




Leon
Festinger

New School for Social Research



Brett
Silverstein

CCNY
(Options)

Brett SilversteinX