In this second issue of volume 5 of the Psychological Research Records 2015, the editorial board approved a series of research papers with empirical rigor and theoretical clarity that make a significant contribution to the advancement of psychology as a scientific discipline.

Derived from a look to basic processes, Ivette González Rivera and her colleagues presented a study on the use of Amaranth as a source of reinforcement in rodents; A second experimental study refers to the strategies used to preserve the belief in a just world when different of relative deprivation are presented, submitted by Christian Enrique Cruz Torres and his co-authors.

Considering health implications and applications three papers that describe research in this field were accepted. David Bruno Diaz Negrete et al. present data comparing three models of risk for alcohol use in students; While Rigoberto León Sánchez and colleagues studied, from a cross-cultural perspective, the beliefs of Spaniards and Mexicans around the causes of obesity; Finally, in this field, Norma Ivonne González-Arratia López-Fuentes and José Luis Valdez Medina observed the effects of sex and age on resiliency levels.

Geared to understand disruptive relationships and interactions, three articles with data about the phenomenon and of possible ways of intervention are presented. In the first article, Brenda Mendoza González and Javier Pedroza Cabrera evaluated the effectiveness of a program aimed at reducing bullying; Marisol Pérez Ramos and Carlos Alvarado Martínez analyze data on the effect of parenting styles on how to negotiate conflicts between parents and their teens; and Cruz Garcia Lirios presents data on a model of criminal behavior.

As a corollary, articles on religiosity and a psychometric study close this edition. Marina Gonzalez Villanueva & Isabel Reyes Lagunes present data on variables that predict religious fundamentalism; While Ma. Begoña Medina Gómez and her colleagues developed and validated an instrument to measure adaptive behavior.

As in previous issues of the journal, we are extremely grateful for the careful reviews of our evaluators and the dedicated and fruitful work of the researchers who submit their work to the editorial process of the periodical.