The effects of noncontingent reinforcement on an arbitrary response in domestic dogs (Canis lupus familiaris).

Noncontingent reinforcement (NCR) procedures entail the response-independent, time-based delivery of a reinforcer (e.g., delivery of a reinforcer on a fixed-time 15 s schedule - FT 15 s). Although NCR has been demonstrated to be effective for the treatment of undesired behaviours in human learners, very few studies have examined it in nonhuman animals. We investigated how NCR with and without extinction (another well-studied behavioural intervention) affected an arbitrary response in companion dogs. The 'stepping on a rug' response was shaped and established in lieu of a problem behaviour in six dogs. Stepping was then exposed to fixed-interval (FI 15 s), fixed-time (FT 15 s), a combination of these schedules of reinforcement (FT 15 s + FI 15 s), and an extinction-only condition. The results indicated that NCR was effective in reducing the target behaviour in three out of the six dogs. These effects were greater in the NCR-with-extinction procedure than in the NCR-without-extinction condition. Future research should investigate the effects of schedule thinning and other schedules of reinforcement (e.g., variable-time schedules) on the behaviour of companion dogs.

Perceiving societal pressure to be happy is linked to poor well-being, especially in happy nations.

Happiness is a valuable experience, and societies want their citizens to be happy. Although this societal commitment seems laudable, overly emphasizing positivity (versus negativity) may create an unattainable emotion norm that ironically compromises individual well-being. In this multi-national study (40 countries; 7443 participants), we investigate how societal pressure to be happy and not sad predicts emotional, cognitive and clinical indicators of well-being around the world, and examine how these relations differ as a function of countries' national happiness levels (collected from the World Happiness Report). Although detrimental well-being associations manifest for an average country, the strength of these relations varies across countries. People's felt societal pressure to be happy and not sad is particularly linked to poor well-being in countries with a higher World Happiness Index. Although the cross-sectional nature of our work prohibits causal conclusions, our findings highlight the correlational link between social emotion valuation and individual well-being, and suggest that high national happiness levels may have downsides for some.

A Systematic Review and Quantitative Analysis of Interteaching.

Interteaching is a behavioral teaching method that departs from the traditional lecture format (Boyce & Hineline in BA 25:215-226, 2002). We updated and expanded previous interteaching reviews and conducted a meta-analysis on its effectiveness. Systematic searches identified 38 relevant studies spanning the years 2005-2018. The majority of these studies were conducted in undergraduate face-to-face courses. The most common independent variables were manipulations of the configuration of interteaching or comparisons to traditional-lecture format. The most common dependent variables were quiz or examination scores. Only 24% of all studies implemented at least five of the seven components of interteaching. Prep guides, discussions, record sheets, and frequent assessments were the most commonly implemented. Meta-analyses indicated that interteaching is more effective than traditional lecture or other control conditions, with an overall large effect size. Furthermore, variations in the configuration of the interteaching components do not seem to substantially limit its effectiveness, as long as the discussion component is included. Future research informed by the present review includes: (a) investigating the efficacy of interteaching in additional academic areas, online environments, workplace training, and continuing education, (b) testing alternative outcome measures, generalization, and procedural integrity, (c) conducting systematic component analyses, and (d) measuring social validity from the instructor's perspective. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s10864-021-09452-3.

Physiological and affective responses to emoji faces: Effects on facial muscle activity, skin conductance, heart rate, and self-reported affect.

The objective of the present study was to evaluate emotional responses to emoji faces through physiological and self-report measures, and evaluate possible differences between men and women. One hundred participants (50 women) observed pictures of happy, neutral, and angry emoji faces, while activity of the zygomatic and corrugator muscles, skin conductance, and heart rate were measured. Self-report measures of emotional experience were also recorded. The results showed an increase in zygomatic muscle activity toward happy emoji faces. An increasing trend in corrugator muscle activity toward angry emoji faces was observed; however, this trend was only marginally significant. Happy emoji faces generated an increase in the skin conductance response. The emotional experience of the participants was also consistent with the emotions that were expressed by the emoji faces. No differences were found between sexes. Overall, the results suggest that emoji faces can especially induce pleasant affective states.

Nathan H. Azrin: A Case Study in Research Translation in Behavior Science.

Nathan H. Azrin (1930-2013) contributed extensively to the fields of experimental and applied behavior analysis. His creative and prolific research programs covered a wide range of experimental and applied areas that resulted in 160 articles and several books published over a period of almost 6 decades. As a result, his career illustrates an unparalleled example of translational work in behavior analysis, which has had a major impact not only within our field, but across disciplines and outside academia. In the current article we present a summary of Azrin's wide ranging contributions in the areas of punishment, behavioral engineering, conditioned reinforcement and token economies, feeding disorders, toilet training, overcorrection, habit disorders, in-class behavior, job finding, marital therapy, and substance abuse. In addition, we use scientometric evidence to gain an insight on Azrin's general approach to treatment evaluation and programmatic research. The analysis of Azrin's approach to research, we believe, holds important lessons to behavior analysts today with an interest in the applied and translational sectors of our science. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s40614-020-00278-4.

What's in a Click? The Efficacy of Conditioned Reinforcement in Applied Animal Training: A Systematic Review and Meta-Analysis.

A conditioned reinforcer is a stimulus that acquired its effectiveness to increase and maintain a target behavior on the basis of the individual's history-e.g., pairings with other reinforcers. This systematic review synthesized findings on conditioned reinforcement in the applied animal training field. Thirty-four studies were included in the review and six studies were eligible for a meta-analysis on the effectiveness of behavioral interventions that implemented conditioned reinforcement (e.g., clicks, spoken word, or whistles paired with food). The majority of studies investigated conditioned reinforcement with dogs (47%, n = 16) and horses (30%, n = 10) implementing click-food pairings. All other species (cats, cattle, fish, goats, and monkeys) were equally distributed across types of conditioned (e.g., clicker or spoken word) and unconditioned reinforcers (e.g., food, water, or tactile). A meta-analysis on the effectiveness of conditioned reinforcement in behavioral interventions found a medium summary effect size (Tau-U 0.77; CI95% = [0.53, 0.89]), when comparing baseline, where no training was done, and treatment levels. Moderators of conditioned reinforcement effectiveness were species (e.g., horses) and research design (e.g., multiple-baseline designs). The small number of intervention-focused studies available limits the present findings and highlights the need for more systematic research into the effectiveness of conditioned reinforcement across species.

Fear Incubation Using an Extended Fear-Conditioning Protocol for Rats.

Emotional memory has been primarily studied with fear-conditioning paradigms. Fear conditioning is a form of learning through which individuals learn the relationships between aversive events and otherwise neutral stimuli. The most-widely utilized procedures for studying emotional memories entail fear conditioning in rats. In these tasks, the unconditioned stimulus (US) is a footshock presented once or several times across single or several sessions, and the conditioned response (CR) is freezing. In a version of these procedures, called cued fear conditioning, a tone (conditioned stimulus, CS) is paired with footshocks (US) during the training phase. During the first test, animals are exposed to the same context in which training took place, and freezing responses are tested in the absence of footshocks and tones (i.e., a context test). During the second test, freezing is measured when the context is changed (e.g., by manipulating the smell and walls of the experimental chamber) and the tone is presented in the absence of footshocks (i.e., a cue test). Most cued fear conditioning procedures entail few tone-shock pairings (e.g., 1-3 trials in a single session). There is a growing interest in less common versions involving an extensive number of pairings (i.e., overtraining) related to the long-lasting effect called fear incubation (i.e., fear responses increase over time without further exposure to aversive events or conditioned stimuli). Extended fear-conditioning tasks have been key to the understanding of fear incubation's behavioral and neurobiological aspects, including its relationship with other psychological phenomena (e.g., post-traumatic stress disorder). Here, we describe an extended fear-conditioning protocol that produces overtraining and fear incubation in rats. This protocol entails a single training session with 25 tone-shock pairings (i.e., overtraining) and a comparison of conditioned freezing responses during context and cue tests 48 h (short-term) and 6 weeks (long-term) after training.

Parkinson disease patients performance in Theory of Mind (ToM) and decision-making tasks with and without Deep Brain Stimulation (DBS) / Desempeño de pacientes con Parkinson con y sin estimulación cerebral profunda (ECP) en Teoría de la Mente (ToM) y toma de decisiones

Abstract: Background: Patients with Parkinson's Disease (PD) show non-motor symptoms, such as cognitive impairment, disrupting executive functions, and mood alterations. Two processes currently researched in these areas are the Theory of Mind (ToM) and the decision-making in PD patients. The ToM is the ability to identify mental states (affective or cognitive) in others, and it is a necessary skill for successful communication in social situations. The decision-making process is researched in PD patients due to alterations in dopaminergic pathways involved in cortico-striatal circuits. These pathways have been linked to cognitive functions. Both processes could be altered in PD patients after the deep brain stimulation (DBS) therapy. Objective: To compare the performance of PD patients (with and without DBS) and healthy controls (HC) in the Theory of Mind and decision-making tasks. Methods: We applied to three groups of patients (PD, n = 4; PD-DBS, n = 5 and HC, n = 5) the Yoni task to identify affective and cognitive features in ToM and the Iowa Gambling Task (IGT) in decision-making. Results: There were no differences across the PD groups in ToM both in the affective and cognitive features. Regarding the decision-making, we obtained results consistent with previous findings, with PD patients showing impairments in this process. Conclusions: Some results suggest that DBS therapy affected PD patients' performance in decision-making when compared to the healthy control group. Our results describe some non-motor changes due to DBS often seen in PD patients.

Resumen: Los pacientes con enfermedad de Parkinson (EP) muestran síntomas no motores, como deterioro cognitivo, alteración de las funciones ejecutivas y alteraciones del estado de ánimo. Dos procesos que se investigan actualmente en este tipo de pacientes son la Teoría de la Mente (ToM) y la toma de decisiones. La Teoría de la Mente es la capacidad de identificar los estados mentales (afectivos o cognitivos) en los demás, y es una habilidad necesaria para la comunicación exitosa en situaciones sociales. El proceso de toma de decisiones se investiga en los pacientes con EP debido a las alteraciones en las vías dopaminérgicas implicadas en los circuitos corticoestriatales, las cuales se han vinculado a las funciones cognitivas. Ambos procesos podrían estar alterados en los pacientes con EP después de la terapia de estimulación cerebral profunda (ECP). Con el objetivo de comparar el rendimiento de pacientes con EP (con y sin ECP) y controles sanos (HC) en teoría de la mente y tareas de toma de decisiones, aplicamos a tres grupos de pacientes (PD, n = 4; PD-DBS, n = 5 y HC, n = 5) la tarea de Yoni para identificar las características afectivas y cognitivas en TM y la Tarea de Juego de Iowa (IGT) en la toma de decisiones. No hubo diferencias entre los grupos de EP en TM tanto en las características afectivas como en las cognitivas. En cuanto a la toma de decisiones, obtuvimos resultados consistentes con los hallazgos anteriores, con pacientes con EP que mostraron impedimentos en este proceso. Algunos resultados sugieren que la terapia de ECP afectó el desempeño de los pacientes con EP en la toma de decisiones cuando se comparó con el grupo de control sano. Nuestros hallazgos describen algunos cambios no motores debidos a la ECP que se observan a menudo en los pacientes con EP.

We Don't Train in Vain: A Systematic Review and Meta-Analysis of Human and Canine Caregiver Training.

The present review assessed the current knowledge regarding caregiver- training effectiveness for human and human-canine dyads. Most canine-related sources (66%; n = 19) were case studies reporting a decrease of learner undesired behavior when using oral instruction (21%; n = 6). Most human-related research used single-case designs (57%; n = 26) reporting an increase in desired learner behavior (22%; n = 10) when caregivers received multi-component training packages (17%, n = 8). The meta-analysis (n = 18) revealed that interventions had a large effect (Hedges' g = 0.88, 95%CI [0.68-1.07]), with packages yielding a slightly larger moderate effect (Hedges' g = 0.76, 95%CI [0.60-0.91]) than oral instruction alone (Hedges' g = 0.74, 95%CI [0.32-1,15]). Although the effectiveness of caregiver training is promising, the results should be interpreted cautiously. Due to the preponderance of case studies within canine literature and the insufficient reporting of data across sources, only few studies could be included in the meta-analysis. Overall, more systematic and comparative research regarding the efficacy of caregivers in behavior change programs across species is needed.

Using Principles from Applied Behaviour Analysis to Address an Undesired Behaviour: Functional Analysis and Treatment of Jumping Up in Companion Dogs.

The aim of this study was to investigate the feasibility and effectiveness of procedures successfully used in human related applied behaviour analysis practices to the field of clinical animal behaviour. Experiment 1 involved functional analyses to identify the reinforcement contingencies maintaining jumping up behaviour in five dogs. Experiment 2 comprised teaching dog owners a noncontingent reinforcement intervention (i.e., time-based reinforcement) via behavioural skills training. Single-case experimental methods were implemented in both experiments. The results of Experiment 1 showed that access to a tangible (dogs D01, D02, D03, and D04) and owner attention (dog D05) were reliably maintaining the jumping up behaviour. Experiment 2 demonstrated that noncontingent reinforcement effectively reduced jumping in three out of four dogs (Tau -0.59, CI 90% [-1-0.15], p = 0.026, Tau -1, CI 90% [-1--0.55], p = 0.0003, and Tau -0.32, CI 90% [-0.76-0.11], p = 0.22 for dyads D01, D02, and D05, respectively), and that behavioural skills training was successful in teaching owners to perform a dog training intervention with high fidelity. Although the results are promising, more canine-related research into functional analysis and noncontingent reinforcement, as well as implementation of behavioural skills training with animal caregivers, is needed.

"Swimming against the current": Behavioral data of B etta splendens during an escape and avoidance task with water flows as the aversive stimulus.

This paper describes the behavioral data of an experiment in which water flows (WFs) were first used as replacement of the traditional electric shocks to test free-operant avoidance in Betta splendens (Hurtado-Parrado et al. 2019 https://doi.org/10.1016/j.beproc.2018.10.021). WFs with a duration of 10 s each were delivered with 30-s flow-flow (F-F) and response-flow (R-F) intervals in a custom-made shuttle tank. Fish escaped or avoided the WFs by changing compartments. Crossings during the WFs, interrupted the flows, were automatically scored as escape (Esc), and initiated a new R-F interval. Crossings that occurred during R-F or F-F intervals were scored as avoidance responses and also reset the R-F interval. We compared the effect of adding a warning stimulus - curtains of air bubbles - to the last 5 s of the R-F interval; i.e., signaled versus unsignaled avoidance. A unique development of the WFs procedure, and thus the data here described, is that crossings were further differentiated into subcategories; namely, early avoidance (EA) if a crossing occurred during the first 25 s of the R-F interval; late avoidance (LA) if a crossing occurred during the last 5 s of the R-F interval; and Flow-Flow avoidance (FF) if a crossing occurred anytime during the F-F interval. Here we present the data of six bettas across the different phases of the experiment; namely, baseline (BL - no WFs programmed), signaled avoidance (SA - warning stimulus scheduled), and unsignaled avoidance (UA - no warning stimulus scheduled). The dataset available at the Open Science Framework (OSF) repository (http://doi.org/10.17605/OSF.IO/FMHXD (Hurtado-Parrado et al., 2019)) includes for each fish and per 20-min daily session the total number of crossings; frequency of each type of crossing (Esc, EA, LA, FF); total WF frequency and duration, the total time spent in each compartment, and an index of preference for each compartment based on the proportion of time spent in the tank's compartments.

Emotion Regulation and Attitudes Toward Conflict in Colombia: Effects of Reappraisal Training on Negative Emotions and Support for Conciliatory and Aggressive Statements.

Control of negative emotions (e.g., anger and fear) by political cues perpetuate intractable conflict by mobilizing public support for aggressive actions. Halperin et al. (2013) found that reappraisal - an adaptive form of emotion regulation - decreased negative emotions triggered by anger-inducing information related to the Israeli-Palestinian conflict, and increased support for conciliatory statements. We tested these effects in the context of the conflict between the Colombian government and the Fuerzas Armadas Revolucionarias de Colombia-Ejército del Pueblo (FARC-EP). Reappraisal training reduced negative emotions produced by a presentation that illustrated FARC's violent actions, and increased support for conciliatory statements (with overall moderate effect magnitudes). We also found that negative emotions mediated the effects of reappraisal on the support for aggressive and conciliatory statements. These findings indicate a high degree of generality of the phenomena, especially considering the differences between the Israeli-Palestinian conflict and the Colombian conflict. Our findings also show promise for replicating these effects on other types of intergroup conflicts and guiding effective public policy.

Diazepam Reduces Escape and Increases Closed-Arms Exploration in Gerbils After 5 min in the Elevated Plus-Maze.

Despite the wide implementation of the elevated plus-maze (EPM) test to assess anxiety-related behaviors in rodents, the interpretation of these measures in gerbils has received limited attention. Here, male gerbils were treated with vehicle or diazepam, followed by a 20-min EPM session. EPM data were subjected to minute-by-minute, 5-min bins and factor analyses. During the first 5-min, gerbils avoided the closed arms in favor of the open arms and diazepam increased open-arms entries; furthermore, a single factor (escape behavior) explained all the analyzed measures. Only after 5-min, gerbils reduced open-arms exploration and three independent factors emerged for each subsequent 5-min bin. These findings suggest that EPM data from gerbils should be analyzed in at least two 5-min bins. Measures from the standard 5-min session seem to be related to an escape response from the EPM through the open arms. Once habituated, measures from the second 5-min bin seem to be related to a conflictive situation: keep trying to escape unsuccessfully (due to open-arms height) or seek protection in the closed arms (unsafe places). Diazepam seems to reduce this conflict by mitigating the escape response (Factor 1 - Anxiety) and increasing closed-arms approach (Factor 2) and risk assessment (Factor 3). Unlike mice and rats, a decrease in open-arms exploration and an increase in risk assessment could be interpreted as an anxiolytic-like effect in gerbils.

Aversive control of Betta splendens behavior using water disturbances: Effects of signaled and unsignaled free-operant avoidance and escape contingencies.

The vast majority of research on aversive control of behavior using animal models employs electric-shock based procedures with avian and mammalian species. Notwithstanding that pragmatic aspects explain this prominence in the field, there is still a need for testing well-established facts about shock-based aversive control using other, perhaps more ecologically valid or biologically relevant, forms of stimulation with other species. Following up on an observation that water disturbances appear to be aversive to Betta splendens (bettas), we developed a preparation for studying free-operant avoidance with this species in which water flows (WFs) replaced electric shocks. Fish changed compartments in a shuttle tank to escape or avoid 10-s WFs, which were delivered with 30-s flow-flow and response-flow intervals. We tested the effect of adding a warning stimulus (curtains of air bubbles) to the last 5 s of the response-flow interval (i.e., signaled avoidance) on the bettas' temporal distribution of crossings and swimming patterns. Escape was the predominant response, which importantly reduced the exposure to the WFs. Avoidance responses rarely exceeded the frequency of escape. The warning stimulus did not produce the expected postponement of responses to the last segment of the response-flow interval. Distinctive swimming patterns emerged, dissipated, and reappeared during baseline and treatment conditions. These findings confirm the aversive function of WFs for bettas and expand the generality of negative reinforcement phenomena using non-shock-based procedures with a less-frequently studied species. Further developments of the WFs paradigm show promise for replicating other aversive control phenomena (e.g., punishment), and analyzing spatiotemporal patterns produced by aversive contingencies.

Análisis de la productividad e impacto de las revistas de psicología colombianas entre 2000 y 2016 / Productivity Analysis and Impact of Colombian Psychology Journals between 2000 and 2016

Resumen La creciente producción de las revistas de psicología colombianas en las últimas décadas lleva a preguntas sobre la relevancia e impacto regional e internacional de su productividad. Considerando la falta de esfuerzos recientes para evaluar el resultado de estas revistas en diferentes fuentes de información, el presente estudio analizó la producción, colaboración e impacto de las revistas de psicología colombianas entre 2000 y 2016 utilizando información de las siguientes bases de datos: Scopus, Scielo, Redalyc, y Journal Scholar Metrics. Analizamos 3915 artículos publicados en 13 revistas. Se incluyeron las revistas que estaban indexadas en varias de estas bases de datos al tiempo durante el tiempo de observación, lo que permitió realizar comparaciones. Observamos la diversificación y el crecimiento de las revistas en todos los indicadores propuestos, con diferentes grados de visibilidad y calidad según los criterios utilizados. Aunque todas las revistas en general mostraron resultados regionales e internacionales similares, algunas se destacaron en todos los indicadores, lo que a su vez invita a otras revistas a mejorar sus indicadores. Concluimos que la producción colombiana en psicología es visible a nivel regional. Además, las revistas deben aumentar algunos de los indicadores para poder compararlos con otros puntos de referencia de acceso abierto regionales e internacionales, ya que es el modelo bajo el cual se concibieron originalmente.

Abstract The growing output of Colombian psychology journals over past decades leads to questions regarding the regional and international relevance and impact of their productivity. Considering the lack of recent efforts to assess the output of these journals across different information sources, the present study analyzed the production, collaboration, and impact of Colombian psychology journals between 2000 and 2016 using information from the following databases: Scopus, Scielo, Redalyc, and Journal Scholar Metrics. We analyzed 3915 articles published across 13 journals. A journal was included in the analysis if it was indexed in several of these databases, which allowed for multiple comparisons. We observed journals' diversification and growth across all the proposed indicators, with different degrees of visibility and quality depending on the criteria used. Although all the journals generally showed similar regional and international results, some excelled across indicators, which in turn challenges other journals to improve their scores. We conclude that Colombian production in psychology is visible on a regional level. Moreover, journals need to increase some of the indicators so they can be compared with other regional and international open-access benchmarks, which is the model in which they were originally conceived.

Effects of goal clarification on impulsivity and academic procrastination of college students / Efectos de la clarificación de metas sobre la impulsividad y la procrastinación académica de los estudiantes universitarios

Abstract Nearly 50% of the college population struggles with academic procrastination, which is an impulsivity problem that often leads to emotional difficulties and college dropout. This study aimed to assess whether an online intervention on clarification of academic goals could reduce impulsivity and academic procrastination in college students. Forty-eight participants were assigned to three different types of interventions: (a) SMART-type goal clarification treatment (setting specific, measurable, agreed upon, realistic and time-based goals); (b) instructional intervention for the abandonment of procrastination (conventional self-help type intervention); and (c) a waiting list. Only SMART intervention produced a statistically signif icant decrease in impulsivity (measured in terms of a hyperbolic discounting test; Whelan & McHugh, 2009), and academic procrastination (measured with the Procrastination Assessment Scale-Student --- PASS), in both cases with small-to-moderate treatment effects. In conclusion, the study showed that online SMART-type goal clarification led to positive changes in impulsive ness and academic procrastination of college students, whereas a self-help protocol failed to produce similar effects. Potential reasons for reduced treatment effects of the SMART interven tion are examined (e.g., experimental control). Also, prospective lines of research are discussed in view of the scarcity of experimental studies in this area.

Resumen Cerca del 50% de la población universitaria experimenta procrastinación académica, un problema asociado con impulsividad, dificultades emocionales y deserción. El estudio evaluó si una intervención en línea en clarificación de metas académicas reduce la impulsividad y la procrastinación académica de estudiantes universitarios. Cuarenta y ocho estudiantes fueron distribuidos en tres tipos de intervención: (a) clarificación de metas tipo SMART (estable cer metas específicas, acordadas en colaboración, medibles, realistas, y basadas en criterios temporales); (b) seguimiento de instrucciones para abandonar la procrastinación (protocolo convencional de tipo autoayuda), y (c) lista de espera. La intervención SMART fue la única que produjo una disminución estadísticamente significativa en impulsividad -medida en términos de descuento hiperbólico (Whelan & McHugh, 2009)- y procrastinación académica -medida a través del Procrastination Assessment Scale-Student (PASS)---- , en ambos casos con efectos de tratamiento de pequeños a moderados. En conclusión, el estudio demostró la efectividad de un protocolo en línea de clarificación de metas tipo SMART para reducir la impulsividad y la procrastinación académica de estudiantes universitarios, efectos que no fueron encontrados con la implementación de un protocolo de tipo autoayuda. Se discuten posibles razones por las cuales los efectos del tratamiento SMART no fueron mayores (e.g., control experimental), y líneas potenciales de investigación a futuro, esto especialmente considerando los escasos estudios experimentales en esta área.

Assessing Mongolian gerbil emotional behavior: effects of two shock intensities and response-independent shocks during an extended inhibitory-avoidance task.

Despite step-down inhibitory avoidance procedures that have been widely implemented in rats and mice to study learning and emotion phenomena, performance of other species in these tasks has received less attention. The case of the Mongolian gerbil is of relevance considering the discrepancies in the parameters of the step-down protocols implemented, especially the wide range of foot-shock intensities (i.e., 0.4-4.0 mA), and the lack of information on long-term performance, extinction effects, and behavioral patterning during these tasks. Experiment 1 aimed to (a) characterize gerbils' acquisition, extinction, and steady-state performance during a multisession (i.e., extended) step-down protocol adapted for implementation in a commercially-available behavioral package (Video Fear Conditioning System-MED Associates Fairfax, VT, USA), and (b) compare gerbils' performance in this task with two shock intensities - 0.5 vs. 1.0 mA-considered in the low-to-mid range. Results indicated that the 1.0 mA protocol produced more reliable and clear evidence of avoidance learning, extinction, and reacquisition in terms of increments in freezing and on-platform time as well as suppression of platform descent. Experiment 2 aimed to (a) assess whether an alternate protocol consisting of a random delivery of foot shocks could replicate the effects of Experiment 1 and (b) characterize gerbils' exploratory behavior during the step-down task (jumping, digging, rearing, and probing). Random shocks did not reproduce the effects observed with the first protocol. The data also indicated that a change from random to response-dependent shocks affects (a) the length of each visit to the platform, but not the frequency of platform descends or freezing time, and (b) the patterns of exploratory behavior, namely, suppression of digging and rearing, as well as increments in probing and jumping. Overall, the study demonstrated the feasibility of the extended step-down protocol for studying steady performance, extinction, and reacquisition of avoidance behavior in gerbils, which could be easily implemented in a commercially available system. The observation that 1.0 mA shocks produced a clear and consistent avoidance behavior suggests that implementation of higher intensities is unnecessary for reproducing aversive-conditioning effects in this species. The observed patterning of freezing, platform descents, and exploratory responses produced by the change from random to periodic shocks may relate to the active defensive system of the gerbil. Of special interest is the probing behavior, which could be interpreted as risk assessment and has not been reported in other rodent species exposed to step-down and similar tasks.

Time in the central area of the elevated plus-maze correlates with impulsivity-related measures during an operant task / El tiempo en el área central del laberinto en cruz elevado correlaciona con medidas relacionadas a impulsividad durante una tarea operante

Impulsivity-related measures have been obtained using operantconditioning tasks. Although it has been suggested that impulsivity indices can also be obtained using the elevated plus-maze (EPM), an anxiety-related animal test, no studies have examined the relationship between anxiety-related variables in EPM and impulsivity-related indices obtained during operant conditioning. Correlations between EPM measures and performance in a 60-s fixed-interval schedule of reinforcement (FI 60-s) were established in this study. Seventeen female rats were exposed to the EPM before starting training in the FI 60-s schedule. A positive correlation was found between the percentage of time spent in the central area of the EPM and both the FI efficiency index and the inter-response times. In addition, these three measures were positively correlated within Factor 1 of a factor analysis. No correlations were observed between open-arms measures in EPM and operant performance. These results suggest that time in the central area of the EPM may be a useful index of impulsivity in rodents without a pre-determined trait of impulsivity.

Medidas relacionadas a impulsividad se han obtenido mediante tareas de condicionamiento operante. Aunque se ha sugerido que índices de impulsividad pueden ser también obtenidos usando el laberinto en cruz elevado (LCE), una prueba animal relacionada con ansiedad, ningún estudio ha examinado la relación entre las variables de ansiedad en el LCE e índices de impulsividad obtenidos durante condicionamiento operante. En este estudio se establecieron correlaciones entre medidas del LCE y el desempeño en un programa de reforzamiento de intervalo fijo 60-s (IF 60-s). Diecisiete ratas hembras fueron expuestas la LCE antes de iniciar el entrenamiento en el programa de IF 60-s. Se encontró una correlación positiva entre el porcentaje de tiempo de permanencia en el área central del LCE y tanto el índice de eficiencia como los tiempos entre respuestas en IF. Adicionalmente, estas tres medidas correlacionaron de forma positiva dentro del Factor 1 del análisis factorial. No se observaron correlaciones entre las medidas de los brazos abiertos del LCE y la ejecución operante. Los resultados sugieren que el tiempo en el área central del LCE podría ser un índice útil de impulsividad en roedores sin un perfil predeterminado de impulsividad.

Impacto y calidad de la productividad académica de los investigadores en Colombia en neurociencia comportamental utilizando modelos animales / Impact and quality of academic production of Colombian researchers in Behavioral Neuroscience using animal models

La productividad científica colombiana es limitada considerando indicadores como el número de artículos publicados en revistas de alto impacto y el índice h. La ausencia de una línea de base y de metodologías de comparación de productividad dificulta trazar las expectativas de publicación provenientes de las instancias nacionales. El objetivo del presente estudio fue evaluar de manera comparativa aspectos relacionados con el impacto y la calidad de la productividad académica de los investigadores en neurociencia comportamental utilizando modelos animales en Colombia. Esto se hizo por medio de la descripción de la población total de investigadores activos en Colombia y la definición de una muestra comparativa de investigadores internacionales. Luego se determinaron en Scopus las métricas asociadas con producción de artículos científicos para cada investigador. Finalmente, se identificó el cuartil de las revistas en las que publicaron los investigadores para un subconjunto de artículos en el Scimago Journal & Country Rank (SJR; Scimago Lab). Se encontró que aunque los investigadores en Colombia presentan una tasa importante de publicación (0.9 artículos por año), cuando se hace un análisis comparativo están rezagados en todos los aspectos de productividad con relación a investigadores internacionales. Se espera que la metodología propuesta pueda extenderse a la evaluación del impacto y calidad de la productividad en temáticas específicas de otras áreas de investigación.

High-impact academic research productivity in Colombia is limited. The absence of baselines and methodologies for meaningful comparisons with other countries complicates productivity projections from academic institutions. The goal of the present study was to evaluate the impact and quality of the academic productivity of researchers working on behavioral neuroscience using animal models in Colombia. The total population of active researchers in Colombia was described, and a comparative international sample of researchers was determined. Subsequently, for each researcher, we analyzed metrics associated to scientific productivity using Scopus and the journal position in Scimago Journal & Country Rank (SJR; Scimago Lab) of a sample of published articles. We report that, although there is an important rate of productivity for researchers in Colombia (0.9 articles per year), all aspects related to productivity were notably lower when compared to a sample of international researchers. Analyses of academic productivity in other scientific areas in Colombia may be enriched by the proposed methodology.