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Using eight experimentally naive Wistar rats, the effects of immediate, unsignaled and signaled delays of reinforcement on lever-pressing response rates were compared with two different procedures. In the Between-Phases procedure, each experimental condition was presented in three thirty-session consecutive phases; whereas, in the Multiple-Schedule procedure, each experimental condition was correlated with one component of a three-component multiple schedule of reinforcement. Regardless of the procedure used, consistent results were observed, that is, differences

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The present paper shows a current review of the Mexican Journal of Behavior Analysis (MJBA). The review includes a brief historical summary of the Mexican Society of Behavior Analysis, along with some aspects about the academic and social context of behavior analysis in Mexico which are mentioned in order to understand the origin of MJBA. The paper presents the number of articles published in English and Spanish, an analysis of the articles related to human and non-human behavior, basic and applied research. The paper also reports the first authors’ university affiliation with higher percentage of articles published.Keywords: behavior analysis in Mexico, Mexican Journal of Behavior Analysis, Mexican Society of Behavior Analysis

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