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©1999 CISAB   Armando D.B. Machado
Ph.D. Duke University 1993


R E S E A R C H   I N T E R E S T S
Dr. Machado is interested in the principles of learning in animals and humans. He is currently studying three topics: choice, timing, and behavioral variability. What variables determine how animals allocate their responses across alternatives? Past research has emphasized static descriptions of choice (e.g., the matching law), but Dr. Machado investigates primarily the behavioral processes underlying choice. In a similar vein, he also asks how animals learn to regulate their behavior when something important in their environment (e.g., food) occurs periodically or quasti-periodically. Finally, he also studies how animals learn to display highly variable, unpredictable, random-like behavior. His laboratory uses standard operant conditioning equipment and pigeons as animal subjects. Dr. Machado also develops mathematical models as a means to test our current understanding of learning principles. His other interests include developmental psychology, epistemology, and philosophical aspects related to behaviorism.




R E P R E S E N T A T I V E   P U B L I C A T I O N S
Machado, Armando. 1992. Behavioral variability and frequency-dependent selection. Journal of the Experimental Analysis of Behavior 58:241-265.

Machado, Armando. 1994. Polymorphic response patterns under frequency-dependent selections. Animal Learning and Behavior 22:53-71.

Orlando Lourenço and Armando Machado. 1996. In defense of Piaget's theory: A reply to 10 common criticisms. Psychological Review 103:143-164.  (Abstract)

Machado, Armando. 1997. Learning the temporal dynamics of behavior. Psychological Review 104: 241-265.  (Abstract)


J O U R N A L   E D I T O R S H I P  
Editorial Board, Journal of the Experimental Analysis of Behavior
Editorial Board, Behavior and Philosophy
Editorial Board, Animal Learning & Behavior

C O N T A C T
Departamento de Psicologia
Instituto de Educação e Psicologia
Universidade do Minho - Campus de Gualtar
4710-057 Braga
PORTUGAL
e-mail:   armandom@iep.uminho.pt


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