¿La gente detecta las mentiras tal como cree que lo hace? Replicación y ampliaciones

[EN]Background: Research shows that people believe deception can be detected from behavioral cues despite their past experience of detecting lies from non-behavioral, contextual information (evidence, third-person reports, etc.). However, in previous research, the question about beliefs was necessarily general, while the question about revealing information was always about a specifi c lie. In this study, we addressed this problem. Method: Participants fi rst indicated how they believed lies can be detected (beliefs; Questionnaire 1 or Q1). Next, they described either how they, in their past, detected a specifi c lie, several lies, or how they, in general, detect lies in their everyday lives (revealing information; Q2). Results: Regardless of the focus of Q2, and in line with prior research, behavioral cues were reported less often, and contextual indicators more often, in responding to Q2 than in responding to Q1. However, contrary to prior fi ndings, behavioral cues still predominated in the responses to Q2. Conclusions: We found no evidence that the specifi c-vs.-general focus of the questions changed the pattern of results, which apparently depended solely on whether participants reported beliefs or revealing information. We provide explanations for the prevalence of behavioral cues in Q2 responses, and make suggestions for future research.[ES]Antecedentes: la investigación muestra que las personas creen que la mentira se detecta a partir de claves conductuales pese a haber detectado mentiras en el pasado a partir de información contextual (evidencias, información de terceros...). En dicha investigación previa, la pregunta sobre creencias ha sido general, mientras que la referente a información reveladora ha sido sobre una mentira concreta. Este estudio resuelve este problema. Método: los participantes indicaron cómo creían que se pueden detectar mentiras (creencias; Cuestionario 1 o C1). Luego describieron cómo, en el pasado, habían descubierto una mentira, varias mentiras, o cómo, en general, suelen detectar mentiras en su vida cotidiana (información reveladora; C2). Resultados: independientemente de la modalidad de C2, y en línea con la investigación previa, las claves conductuales se mencionaron menos, y los indicadores contextuales más, al responder a C2 que a C1. Sin embargo, se mencionaron más indicios conductuales que contextuales incluso en C2. Conclusiones: no hallamos evidencia de que el foco específi co o general de las preguntas cambiara el patrón de resultados, que al parecer dependió solo de si se mencionaban creencias o información reveladora. Ofrecemos explicaciones para la prevalencia de claves conductuales en C2 y hacemos sugerencias para la investigación futuraConsejería de Educación, Junta de Castilla y León (Spain), Subvenciones Destinadas al Apoyo de los Grupos de Investigación Reconocidos de Universidades Públicas de Castilla y Leó

Both High Cognitive Load and Transcranial Direct Current Stimulation Over the Right Inferior Frontal Cortex Make Truth and Lie Responses More Similar

[EN]Deception scholars have argued that increasing the liar’s cognitive system artificially can produce deception cues. However, if too much load is imposed, the truth tellers’ performance can also be impaired. To address this issue, we designed a veracity task that incorporated a secondary task to increase cognitive load gradually. Also, because deception has been associated with activity in the inferior frontal cortex (IFC), we examined the influence of transcranial direct current stimulation (tDCS) of the IFC on performance. During stimulation, participants truthfully or deceptively indicated whether each of a number of statements shown on screen was true or not. Higher load decreased recall but not general compliance or response times (RTs). Truthful trials yielded higher compliance rates and faster RTs than deceptive trials except for the highest load level. Anodal right stimulation decreased compliance in truthful trials when participants were not overloaded. Truth telling was more vulnerable to cognitive load and tDCS than lying

¿Detecta usted las mentiras tal como cree que lo hace?

Consejería de Educación de la Junta de Castilla y Leó

How people [try to] detect lies in everyday life

Laboratory-based deception-detection experiments often fail to capture the features of everyday life lie detection among ordinary citizens. In this study, we examined how people [try to] detect deception in real life. Over 10 weeks, every time the participants felt they had detected a lie, they filled in an online survey. Results show that, in everyday life, many lies are detected unexpectedly, often from non-behavioral indicators, that people suspecting deception search for both behavioral cues and non-behavioral information, but that non-behavioral information is more useful to detect deception. The study addresses aspects unexplored in prior studies on everyday life lie detection, provides new insights, and has theoretical implications.Financiación: Consejería de Educación de la Junta de Castilla y León, España. Apoyo: Fundación Universitaria Behavior & Law (https://behaviorandlaw.com/

Videogames as means of learning: a case study in maths in Primary Education

El objetivo del presente estudio es comprender y analizar los procesos de aprendizaje generados en dos aulas de primaria, tercero y cuarto curso, mediante el uso de un multimedia educativo, Jclic, y el videojuego Hearthstone, como herramientas de apoyo al desarrollo del cálculo mental y la resolución de problemas. La metodología seguida ha sido el estudio de caso mediante un enfoque de investigación-acción en los dos cursos mencionados en una población de 34 participantes. Los resultados obtenidos tanto desde el punto de vista del desarrollo cognitivo como social y personal han sido positivos respecto al uso del juego como herramienta de aprendizaje, y en especial en el uso de los videojuegos y su potencial educativo, estimulando la motivación, elemento clave en el proceso de aprendizaje, mediante la asunción de retos cada vez más complejos.The objective of the present study is to understand and analyze the learning processes generated in two primary classroom, third and fourth levels, through the use of Jclic, an educational multimedia, and the videogame Hearthstone, as tools to support the development of mental calculation and problem solving. The methodology followed has been the case study using a research-action approach in the two courses mentioned before with a population of 34 participants. The results obtained both from the point of view of cognitive development and social and personal have been positive regarding the use of the game as a learning tool, and especially in the use of video games and their educational potential, stimulating motivation, a key element in the process of learning, through the assumption of increasingly complex challenges

Learning to detect deception from evasive answers and inconsistencies across repeated interviews: a study with lay respondents and police officers

This research was formally endorsed by the National Police College of Spain, the Behavior and Law Foundation, and the Promoción y Divulgación Científica, S. L. company. The views expressed in this article are those of the authors and do not necessarily reflect the views of the supporters.[EN]Previous research has shown that inconsistencies across repeated interviews do not indicate deception because liars deliberately tend to repeat the same story. However, when a strategic interview approach that makes it difficult for liars to use the repeat strategy is used, both consistency and evasive answers differ significantly between truth tellers and liars, and statistical software (binary logistic regression analyses) can reach high classification rates (Masip et al., 2016b). Yet, if the interview procedure is to be used in applied settings the decision process will be made by humans, not statistical software. To address this issue, in the current study, 475 college students (Experiment 1) and 142 police officers (Experiment 2) were instructed to code and use consistency, evasive answers, or a combination or both before judging the veracity of Masip et al.’s (2016b) interview transcripts. Accuracy rates were high (60% to over 90%). Evasive answers yielded higher rates than consistency, and the combination of both these cues produced the highest accuracy rates in identifying both truthful and deceptive statements. Uninstructed participants performed fairly well (around 75% accuracy), apparently because they spontaneously used consistency and evasive answers. The pattern of resultswas the same among students, all officers, and veteran officers only, and shows that inconsistencies between interviews and evasive answers reveal deception when a strategic interview approach that hinders the repeat strategy is used.Junta de Castilla y León. Consejería de Educación. Programa de Apoyo a Proyectos de Investigación (Ref.: SA086U14

PTEN Deletion in Adult Mice Induces Hypoinsulinemia With Concomitant Low Glucose Levels

The PI3K/AKT pathway, negatively regulated by PTEN, plays a paramount role in glucose metabolism regulation due to its activation by the insulin receptor signaling pathway. We generated a PTEN-KO mouse to evaluate the systemic effect of the overactivation of the PI3K/AKT pathway in insulin signaling and glucose homeostasis. Our results demonstrate that PTEN-KO mice show very low glucose levels in the fasted state, which poorly respond to glucose and pyruvate administration. Insulinemia decreased without alterations in pancreatic islets. Among the possible reasons, we uncover the deregulation of the expression of proximal tubule glucose transporter and consequent glycosuria. Moreover, we evidence an altered activation of hepatic gluconeogenesis-related genes. In addition, the expression of several genes related to β-oxidation showed a delayed or even absent response to fasting, suggesting that the lack of PTEN not only impairs glucose metabolism but also slows down the use of lipids as a metabolic fuel. We conclude that the inducible full PTEN-KO mice could be a good model to study the metabolic interactions between glycidic and lipidic metabolism in hypoinsulinemic hypoglycemia and that PTEN could be an important mediator in the disease and/or a potential drug target

Role of adipose tissue GLP-1R expression in metabolic improvement after bariatric surgery in patients with type 2 diabetes

We aimed to explore the relationship between GLP-1 receptor (GLP-1R) expression in adipose tissue (AT) and incretin secretion, glucose homeostasis and weight loss, in patients with morbid obesity and type 2 diabetes undergoing bariatric surgery. RNA was extracted from subcutaneous (SAT) and visceral (VAT) AT biopsies from 40 patients randomized to metabolic gastric bypass, sleeve gastrectomy or greater curvature plication. Biochemical parameters, fasting plasma insulin, glucagon and area under the curve (AUC) of GLP-1 following a standard meal test were determined before and 1 year after bariatric surgery. GLP-1R expression was higher in VAT than in SAT. GLP-1R expression in VAT correlated with weight (r = -0.453, p = 0.008), waist circumference (r = -0.494, p = 0.004), plasma insulin (r = -0.466, p = 0.007), and systolic blood pressure (BP) (r = -0.410, p = 0.018). At 1 year, GLP-1R expression in VAT was negatively associated with diastolic BP (r = -0.361, p = 0.039) and, following metabolic gastric bypass, with the increase of GLP-1 AUC, (R-2 = 0.46, p = 0.038). Finally, GLP-1R in AT was similar independently of diabetes outcomes and was not associated with weight loss after surgery. Thus, GLP-1R expression in AT is of limited value to predict incretin response and does not play a role in metabolic outcomes after bariatric surgery

Peri-operative red blood cell transfusion in neonates and infants: NEonate and Children audiT of Anaesthesia pRactice IN Europe: A prospective European multicentre observational study

BACKGROUND: Little is known about current clinical practice concerning peri-operative red blood cell transfusion in neonates and small infants. Guidelines suggest transfusions based on haemoglobin thresholds ranging from 8.5 to 12 g dl-1, distinguishing between children from birth to day 7 (week 1), from day 8 to day 14 (week 2) or from day 15 (≥week 3) onwards. OBJECTIVE: To observe peri-operative red blood cell transfusion practice according to guidelines in relation to patient outcome. DESIGN: A multicentre observational study. SETTING: The NEonate-Children sTudy of Anaesthesia pRactice IN Europe (NECTARINE) trial recruited patients up to 60 weeks' postmenstrual age undergoing anaesthesia for surgical or diagnostic procedures from 165 centres in 31 European countries between March 2016 and January 2017. PATIENTS: The data included 5609 patients undergoing 6542 procedures. Inclusion criteria was a peri-operative red blood cell transfusion. MAIN OUTCOME MEASURES: The primary endpoint was the haemoglobin level triggering a transfusion for neonates in week 1, week 2 and week 3. Secondary endpoints were transfusion volumes, 'delta haemoglobin' (preprocedure - transfusion-triggering) and 30-day and 90-day morbidity and mortality. RESULTS: Peri-operative red blood cell transfusions were recorded during 447 procedures (6.9%). The median haemoglobin levels triggering a transfusion were 9.6 [IQR 8.7 to 10.9] g dl-1 for neonates in week 1, 9.6 [7.7 to 10.4] g dl-1 in week 2 and 8.0 [7.3 to 9.0] g dl-1 in week 3. The median transfusion volume was 17.1 [11.1 to 26.4] ml kg-1 with a median delta haemoglobin of 1.8 [0.0 to 3.6] g dl-1. Thirty-day morbidity was 47.8% with an overall mortality of 11.3%. CONCLUSIONS: Results indicate lower transfusion-triggering haemoglobin thresholds in clinical practice than suggested by current guidelines. The high morbidity and mortality of this NECTARINE sub-cohort calls for investigative action and evidence-based guidelines addressing peri-operative red blood cell transfusions strategies. TRIAL REGISTRATION: ClinicalTrials.gov, identifier: NCT02350348

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