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Free-mtrix - Free cultural selection and social behavior experiments.
Copyright (C) 2016-2021 Carlos Rafael Fernandes Picanço.
Copyright (C) 2016-2020 Thais Maria Monteiro Guimarães.
Copyright (C) 2016-2019 Universidade Federal do Pará.

The present file is distributed under the terms of the GNU General Public License (GPL v3.0).

You should have received a copy of the GNU General Public License
along with this program. If not, see



Free-mtrix is a set of free softwares (GPL3) for experimentally studying metacontingencies and laboratory micro-cultures. It was designed to be intuitive for researchers from the field of behavioral analysis, but the software may also be useful for behavioral sociologists. One can design and present choice-based tasks similar to the ones reported by Wiggins (1969), Vichi (2004) and Vichi, Andery & Glenn (2009). Participants can choose elements in a matrix (e.g., a row) and the researcher can determine how individual and social consequences will be presented (e.g., custom messages, points and reasoning questions) along different conditions in experiments.


Vichi, C. (2004). Igualdade ou desigualdade em pequeno grupo: Um análogo experimental de manipulação de uma prática cultural. Dissertação de Mestrado. São Paulo: Pontifícia Universidade Católica de São Paulo.

Vichi, C., Andery, M. A. P. A., & Glenn, S. S. (2009). A metacontingency experiment: the effects of contingent consequences on patterns of interlocking contingencies reinforcement. Behavioral and Social Issues, 18, 41-57. doi: 10.5210/bsi.v18i1.2292

Wiggins, J. A. (1969). Status differentiation, external consequences and alternative reward distributions. Em R. L Burgess e D. Bussell Jr., Behavioral Sociology (pp. 109-126). New York: Columbia University Press.

How to install and setup the software?

Please, check the INSTALL directory.

Works that cited Free-mtrix

Guimarães, T. M. M., Picanço, C. R., & Tourinho, E. Z. (2019). Effects of negative punishment on culturants in a situation of concurrence between operant contingencies and metacontingencies. Perspectives on Behavior Science.

Ribeiro, D. C. M., Guimarães, T. M. M., Picanço, C. R., Caralho Neto, M. B. & Tourinho, E. Z. (2021). Effects of an Analogue of Negative Reinforcement on the Selection of Culturants. Psicologia: Teoria e Pesquisa.


Free cultural selection and social behavior experiments








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