Sistema Regional de Información
en línea para Revistas Científicas de América Latina,
el Caribe, España y Portugal

The genus Tamandua is made up of two species of anteaters, both with distribution in Colombia; Tamandua mexicana in the trans-Andean region and Tamandua tetradactyla in the Cisandina region, there being a sympatry zone in the center of the country, where individuals with intermediate phenotypes have been found, classified as Tamandua mexicana, despite not having the complete phenotype of this species. In this study, a genetic characterization of some individuals of the genus Tamandua was carried out, through a phylogenetic reconstruction by maximum likelihood and a Bayesian analysis, based on the mitochondrial markers Ribosomal RNA 16S (rRNA 16S), Cytochrome Oxidase I (COI), and the Hypervariable Region I of MitochondriaThe results show a genetic differentiation between the individuals of T. mexicana and T. tetradactyla, which supports the existence of two species for the genus, individuals with the intermediate phenotype do not show any tendency to form an isolated clade within the group of T. mexicana. These results are consistent with the current taxonomic classification of the genus, and do not support any further evolutionary process.

Objective. The purpose of this research was to study the psychometric properties of the Lemos and Londoño Emotional Dependence Questionnaire (2006). Method. A total of 634 participants, aged between 18 and 50 years, completed the instrument. Results. A five-factor structure was found, which was confirmed by confirmatory factor analysis: separation anxiety (6 items, ω = 0.892), partner´s affective expression (4 items, ω = 0.854), fear of loneliness (3 items, ω = 0.870), modification of plans (3 items, ω = 0.814), and borderline expression (3 items, ω = 0.853). This structure contrasts with the six factors proposed in the original scale. The adequate psychometric results suggest that this is a valid and reliable instrument for measuring emotional dependence.

Objective. This study aimed to verify the relationships between dark personality traits and the dimensions of aggressiveness. 208 individuals from the general population participated, with a mean age of 26.83 years (SD = 8.99). Method. The following measures were used: Dark Triad Dirty Dozen, Buss-Perry Aggression Questionnaire, and sociodemographic questionnaire. The data were explored using SPSS and JASP software. Results. The results showed that the dark personality traits narcissism, Machiavellianism and psychopathy were positively correlated with the four aggressiveness factors. Furthermore, dark personality traits showed direct and indirect effects, mediated by anger and hostility, on physical and verbal aggression. It is concluded that feelings (hostile) and emotion (anger) can contribute to the perpetuation of aggressive behaviors.

Objective. The objective of the study was to characterize the electroencephalographic coherence pattern during mental imagery elicitation in young men. Method. EEG activity was recorded during two conditions, Retention (RET) and Imagery (IMG). A series of ten geometric figures were presented. Participants were asked to storage the images (RET), and to create new images based on the figure (IMG). Then, coherence values were compared between conditions. Results. Increased Coherence was presented in left and right posterior-anterior regions during mental imagery, which could be related to cognitive manipulation of stimuli in creative processes.

Objective. The objective of this study was to adapt the NPI-13 for the Brazilian context, gathering psychometrics evidence. Method. A total of 520 participants completed the NPI-13, the Basic Values Questionnaire, the Five-Factor Inventory, and the Dirty Dozen. Results. The three-factor structure of the NPI-13 (Leadership/Authority, Grandiosity/Exhibitionism, Entitlement/Exploitativeness) was supported (TLI > 0.90; RMSEA < 0.08). Correlations were found between the NPI-13 with achievement values and the dark dyad (i.e., psychopathy and Machiavellianism). The Leadership/Authority and Grandiosity/Exhibitionism factors were consistently correlated with extraversion, while Entitlement/Exploitativeness was correlated with neuroticism. In summary, evidence was gathered for the NPI-13 in the Brazilian context, indicating that it is a useful measure for capturing the multidimensionality of the construct in Brazil.

. Objective. The aim of the study was to determine the effect of an emotional regulation skills-based program on stress, anxiety, depression, and eating behavior, and to identify if there is a causal relationship between variables. Methods. An experimental study was carried out with 24 Mexican adults randomly assigned to a cognitive-behavioral intervention. A questionnaire including the DERS-15, DASS-21, AEBQ-E, and Emotional Eating Scale was utilized. Results. Following the intervention, changes were observed in all variables compared to baseline measurements, with several showing moderate effect sizes. There is a causal association between emotional dysregulation and negative affectivity, eating behavior, and emotional eating.

Objective. This study aimed to: a) analyze the trajectory of self-efficacy in Argentine secondary school students over three consecutive years, and b) examine its association with the personal growth initiative (PGI) at each measurement. Method. This longitudinal study included 313 students at T1, 280 at T2, and 249 at T3. Argentine adaptations of the O'Sullivan Self-Efficacy and PGI-II scales were applied. Repeated Measures ANOVA was used to study the trajectory of self-efficacy, and Pearson's r correlation was used to analyze the associations. Results. Self-efficacy showed a decrease towards the third time point. Positive and significant correlations were observed between all self-efficacy dimensions and PGI.

Objective. To present evidence of validity and reliability of the Emoji Personality Scale, considering that this may be a dynamic and little explored strategy for measuring individual differences. The scale uses different emojis to illustrate characteristics of the Big Five. In addition, this measure’s relationship with sociodemographic variables was also investigated. Method. 234 individuals participated, with a mean age of 20.5 years (SD = 5.60). Results. Model-fit indicators were observed for the five-factor model. Reliability ranged from .61 to .89, with gender differences observed in agreeableness and extraversion. Finally, correlations with another personality measure were observed.

Objective. To analyze distributive justice in terms of cultural individualism-collectivism, as well as independent and interdependent self-perception. Method. The sample consisted of Spaniards and Costa Ricans (N = 859; M = 33.28; SD = 13.12 years; 37.9% were male and 62.1% female). Analysis of variance with post-hoc comparisons was performed to determine how the combination of cultural context and self-perception influences distributive justice operationalized with the ultimatum game. Results. Participants who live in a collectivist cultural context are more accepting of unequal proposals, while those with an independent self-perception reject the most unjust ones, and those who are interdependent and collectivist (vs. independent and individualistic) have less distributive justice.

Objetive. Cognitive-Behavioral Group Therapy (CBGT) is a group approach that assesses the interconnections between thoughts, emotions, and behaviors in a group setting. This study aimed to assess the feasibility and preliminary effectiveness of a CBGT protocol focused on emotion regulation, in reducing emotional reactivity and its potential impact on components of emotion-driven eating behaviors. Method. Twenty participants underwent an 8-week intervention, with half receiving psychoeducational intervention and the other half receiving CBGT with a focus on emotional regulation. We used questionnaires to assess anxiety and eating behavior, and we measured psychophysiological changes through cortisol levels and heart rate variability. Results. After six weeks, the CBGT group had lower scores for emotional and uncontrolled eating, along with an increase in parasympathetic modulation and a decrease in cortisol levels. These results suggest that CBGT may hold potential for improving emotional regulation and reducing emotion-based eating behavior; however, further research is needed to confirm its effectiveness.