Willy
Hellpach

Heidelberg University (PsychTree)


Wilhelm
Witte

University of Regensburg, Germany


Fred
Attneave

University of Oregon


Richard K.
Olson

CU Boulder




John S.
Werner

UC Davis
?


Gene V.
Glass

Arizona State (EduTree)


Ernst
Boesch

Saarland University


Paul
Baltes

Max Planck Institute for Human Development (Berlin)


Reinhold
Kliegl

University of Potsdam


Ralf
Engbert

University of Potsdam


Wilhelm
Wundt

University of Leipzig


Willy
Hellpach

Heidelberg University (PsychTree)


Wilhelm
Witte

University of Regensburg, Germany
?


Fred
Attneave

University of Oregon


Richard K.
Olson

CU Boulder






John S.
Werner

UC Davis
?


Gene V.
Glass

Arizona State (EduTree)


Jean
Piaget

University of Geneva


Bärbel
Inhelder

University of Geneva


Ernst
Boesch

Saarland University


Paul
Baltes

Max Planck Institute for Human Development (Berlin)


Reinhold
Kliegl

University of Potsdam






Frances Keesler
Graham

University of Delaware






Joseph Anthony
Gengerelli

UCLA (PsychTree)


Robert
Calfee

UC Riverside


William
Chase

Carnegie Mellon


Patrick
Cavanagh

Glendon College




Cletus J.
Burke

California State University (PsychTree)


James P.
Egan

Indiana University Bloomington




Ronald
Kinchla

Princeton








David Martin
Regan

York University


Bela
Julesz

Bell Labs




Christopher W.
Tyler

Smith Kettlewell


Paul
Fraisse

University of Paris


Claude
Bonnet

Universite Paris V


Giorgio
Abetti

Università degli Studi di Firenze (Physics Tree)




John Larry
Kelly, Jr.

Bell Labs (E-Tree)


Bela
Julesz

Bell Labs


Andrei
Gorea

CNRS & Université Paris Descartes


Eric
Castet

CNRS & Université de la Méditerranée

Martin
Rolfs

HU Berlin
(Options)

Martin RolfsX