Lee Edward
Travis

University of Iowa


Donald
Lindsley

University of Iowa


Clark L.
Hull

UW Madison




Jack
Michael

Western Michigan University


Montrose
Wolf

University of Kansas
?


R. Vance
Hall

University of Kansas

Héctor Ayala
Velázquez

Facultad de Psicologia, UNAM
(Options)

Kalina Isela
Martínez Martínez

Universidad Autonoma de Aguascalientes

Francisco Javier
Pedroza Cabrera

Universidad Autonoma de Aguascalientes

Héctor VelázquezX