The Psychological Record, 2013, 63, 85–98
Matheus Hidalgo is now at Universidade Federal de Sergipe, and Mariliz Vasconcellos is at
Universidade Nove de Julho.
Data collection was supported by the State of São Paulo Foundation for Research Support
(FAPESP, Grant 2003/09928-4). Preparation of the manuscript was supported by the Brazilian National
Research Council (Grant 573972/2008-7) and FAPESP (Grant 08/57705-8), both for the National Institute
of Research and Technology on Behavior, Cognition and Teaching (Chairperson: Deisy G. de Souza). The
first author has a Research Productivity Grant from CNPq, and the second author had an undergraduate
Science Initiation Grant from CNPq.
We are grateful to Deisy de Souza, Bill McIlvane, Bill Dube, Ana Arantes, and Priscila Grisante for
their collaboration on this project.
Correspondence concerning this article should be addressed to Julio C. de Rose, Departamento de
Psicologia, Universidade Federal de São Carlos, Caixa Postal 676, 13565-905 São Carlos, SP, Brazil.
E- mail: email@example.com
CONTROLLING RELATIONS IN BASELINE CONDITIONAL
DISCRIMINATIONS AS DETERMINANTS OF STIMULUS
Julio C. de Rose, Matheus Hidalgo, and Mariliz Vasconcellos
Universidade Federal de São Carlos
Variation in baseline controlling relations is suggested as one of the factors
determining variability in stimulus equivalence outcomes. This study used
single- comparison trials attempting to control such controlling relations.
Four children learned AB, BC, and CD conditional discriminations, with 2
samples and 2 comparison stimuli. In Condition A, a mask always covered the
immediate equivalence formation. Condition B trained the same sequence
of conditional discriminations with different stimuli, attempting to prevent
sample- S+ control in the BC conditional discrimination. Two children did not
show equivalence, whereas the other 2 did. Probes suggested that children who
formed equivalence in Condition B acquired sample- S+ relations, even with
training designed to prevent them. Results indicate that acquisition of both
Key words: stimulus equivalence, stimulus control, stimulus control
topographies, controlling relation, children
According to mathematical set theory, relations that possess the properties of