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The aim of this article is to produce a general comprehension about the radical multiplicity of psychology as a network of different and even contradictory theories and practices. First, we will present the epistemological discussion about this radical multiplicity, enphasizing how this debate is attached to the question about psychological scientificity. After that, this radical plurality will be considered beyond the epistemological view, using Bruno Latour, Annemarie Mol and Joh Law’s Actor-Network Theory and Isabelle Stengers and Vinciane Despret’s Political Epistemology. For these authors, not only is this multiplicity considered positive for science, but the psychologies are considered as subjectivity production devices. These suppositions oriented a group of researches by high-school students in Rio the Janeiro, with the aim of detecting the presencce of these psychologized subjectivities. In the conclusion the results of these researches will be discussed, considering the onthological policies involved in the choices of methods.