Complex effects of NMDA receptor antagonist APV in the basolateral amygdala on acquisition of two-way avoidance reaction and long-term fear memory

Although much has been learned about the role of the amygdala in Pavlovian fear conditioning, relatively little is known about an involvement of this structure in more complex aversive learning, such as acquisition of an active avoidance reaction. In the present study, rats with a pretraining injection of the N-methyl-D-aspartate (NMDA) receptor antagonist, 2-amino-5-phosphonopentanoic acid (APV), into the basolateral amygdala (BLA) were found to be impaired in two-way active avoidance learning. During multitrial training in a shuttle box, the APV-injected rats were not different from the controls in sensitivity to shock or in acquisition of freezing to contextual cues. However, APV injection led to impaired retention of contextual fear when tested 48 h later, along with an attenuation of c-Fos expression in the amygdala. These results are consistent with the role of NMDA receptors of the BLA in long-term memory of fear, previously documented in Pavlovian conditioning paradigms. The APV-induced impairment in the active avoidance learning coincided with deficits in directionality of the escape reaction and in attention to conditioned stimuli. These data indicate that normal functioning of NMDA receptors in the basolateral amygdala is required during acquisition of adaptive instrumental responses in a shuttle box but is not necessary for acquisition of short-term contextual fear in this situation.     

Trust in alternative and professional media: The case of the youth news audiences in three European countries

Abstract

This exploratory paper applying cross-cultural and developmental perspective analyses and discusses trust in alternative media and its relation to trust in professional media, seeking to identify the national specifics of media trust and its developmental patterns. Employing 2016 survey data of Czech, Estonian and Greek youth (aged 14–25, N = 3654) collected as part of the international CATCH-EyoU project (Horizon 2020), the study outlines the typology of media trust, comprising trust in alternative and professional media, and compares social and political predictors influencing media trust in the three countries. The study illustrates the diversity of relations between the two types of media trust, concluding that differences in selected predictors of media trust and the distribution of media trust types across national sub-samples illuminate the strong role national context plays, illustrating the varying pathways development of media trust follows in these varied contexts along socioeconomic and cultural lines.     

Interference suppression vs. response inhibition: An explanation for the absence of a bilingual advantage in preschoolers’ Stroop task performance

The well-documented advantage that bilingual speakers demonstrate across the lifespan on measures of controlled attention is not observed in preschoolers’ performance on Stroop task variations. We examined the role of task demands in explaining this discrepancy. Whereas the Color/Word Stroop used with adult participants requires interference suppression, the Stroop task typically used with preschoolers requires only response inhibition. We developed an age-appropriate conflict task that measures interference suppression. Fifty-one preschool children (26 bilinguals) completed this new Bivalent Shape Task and the Day/Night task used in previous research. Bilingual in comparison to monolingual children performed better on incongruent trials of the Bivalent Shape Task, but did not differ on other measures. The results indicate that the discrepancy between preschoolers and older individuals in performance on Stroop task adaptations results from characteristics of the task rather than developmental differences. Further, the findings provide additional support for the importance of interference suppression as a mechanism underlying the bilingual advantage.     

A Cross-Country Evaluation of Cheating in Academia—A Comparison of Data from the US and the Czech Republic

In this study, we examine differences in cheating behaviors in higher education between two countries, namely the United States and the Czech Republic, which differ in many social, cultural and political aspects. We compare a recent (2011) Czech Republic survey of 291 students to that of 268 students in the US (Klein et al., 2007). For all items surveyed, CR students showed a higher propensity to engage in cheating. Additionally, we found more forms of serious cheating present in the Czech sample. In all cases, the differences between the US and Czech samples were statistically significant.     

'I'm Just Saying . . .': Discourse Markers of Standpoint Continuity

Examining discourse markers (Schiffrin, 1987) in two transcribed discussions of controversial issues in an undergraduate 'critical thinking' class, we note frequent uses of 'I'm just saying' and related metadiscursive expressions (I'm/we're saying, I'm/we're not saying, etc.). Our central claim is that these 'saying' expressions are pragmatic devices by which speakers claim 'all along' to have held a consistent argumentative standpoint, one that continues through the discussion unless changed for good reasons. Through close analysis of a series of discourse examples, we show how these discourse markers are used to display continuity, deflect counterarguments, and acknowledge the force of counterarguments while preserving continuity. In a concluding section we reflect critically on the use of these continuity markers with regard to four pragmatic functions that they potentially serve: to specify and clarify argumentative standpoints, to acknowledge a presumption of standpoint continuity, to acknowledge a normative expectation that discussion participants should have standpoints, and to avoid overt disagreement while saving face.     

Historiography of Czech psychology

The paper is aimed at presenting the development of the Czech historiography of psychology, which was strongly influenced by the political changes in Central and Eastern Europe. The authors deal with the historiography of psychology at the three universities offering an undergraduate program in psychology, located in Prague, Brno, and Olomouc, and at the Institute of Psychology of the Czech Academy of Sciences. Recent research, teaching, textbooks, and journal articles published in Czech and in foreign languages are showcased. The historiography of Czech psychotherapy is mentioned as a special thematic development. Contemporary problems and perspectives in the field of the history of psychology in the Czech Republic are discussed, sources of information are given.     

Effects of route guidance variable message signs (VMS) on driver behaviour

Effects of route guidance Variable Message Signs (VMS) on speed and route choice were investigated in a field study on two sites on motorways. Two VMS were used in the study, which displayed information about a closed road section downstream on the motorways and recommendations for alternative routes. Route choice, speed and braking behaviour were compared between vehicles approaching the VMS while they displayed messages and while they were left blank without message. There was high compliance with the messages on the VMS. About every fifth vehicle changed route choice according to the recommendation, and almost none drove as far as the closed road section. Speed measurements of 3342 vehicles showed large speed reductions, and video observations showed that large proportions of vehicles braked while approaching the VMS. The speed reductions and braking manoeuvres can partly be attributed to attention overload or distraction due to the information on the VMS. However, a proportion of the speed reductions was due to chain reactions where one vehicle braked and forced the following vehicles to brake or change lanes in order to avoid collisions. Safety problems may result directly from distraction, or indirectly from the reactions of the drivers to the distraction.     

Protective effect of practice on cognition during aging: implications for predictive characteristics of performance and efficacy of practice

In the present study, the effect of previous experience on spatial memory, which required the retention of information either over long intervals or within a single session, was longitudinally tested in the water maze in male F-344 rats that were from 6 to 24 months of age. Performance in these tasks was found to be age-dependent (Markowska, 1999). Other behavioral tasks in the straight alley and with a visible platform in the water maze controlled the noncognitive components of performance. For all tasks, performance was significantly correlated between 12-month-old and 18-month-old rats, indicating that cognitive performance at the early, but not advanced, stage of aging could be predicted from performance at a younger age if the novelty of the first exposure to the task was eliminated. The protective effect of experience was more robust in the reference memory task as compared to the working memory task and was modified by age when training was initiated. Behavior during the probe trials was more sensitive to the effect of aging and more resistant to the beneficial effect of practice as compared to the performance in the platform trials. The speed of swimming of experienced rats progressively decreased with age only when tested in the cognitive tasks but not in the straight alley. This indicates that speed of swimming during cognitive tasks does not exclusively reflect the ability to swim, but might be also affected by the cognitive demands of the task. Protective effect of experience on cognition was not modified by restriction in diet.     

Risk Patterns and Correlated Brain Activities. Multidimensional Statistical Analysis of fMRI Data in Economic Decision Making Study

Decision making usually involves uncertainty and risk. Understanding which parts of the human brain are activated during decisions under risk and which neural processes underly (risky) investment decisions are important goals in neuroeconomics. Here, we analyze functional magnetic resonance imaging (fMRI) data on 17 subjects who were exposed to an investment decision task from Mohr, Biele, Krugel, Li, and Heekeren (in NeuroImage 49, 2556–2563, 2010b). We obtain a time series of three-dimensional images of the blood-oxygen-level dependent (BOLD) fMRI signals. We apply a panel version of the dynamic semiparametric factor model (DSFM) presented in Park, Mammen, Wolfgang, and Borak (in Journal of the American Statistical Association 104(485), 284–298, 2009) and identify task-related activations in space and dynamics in time. With the panel DSFM (PDSFM) we can capture the dynamic behavior of the specific brain regions common for all subjects and represent the high-dimensional time-series data in easily interpretable low-dimensional dynamic factors without large loss of variability. Further, we classify the risk attitudes of all subjects based on the estimated low-dimensional time series. Our classification analysis successfully confirms the estimated risk attitudes derived directly from subjects’ decision behavior.     

Ratings of physical attractiveness within young,romantically engaged couples in Malaysia

This study examined the matching hypothesis, the positive illusions effect and the love is blind bias in young, romantically engaged couples in Malaysia. Each member of 58 young, romantically engaged heterosexual couples completed the Body Esteem Scale and items assessing physical attractiveness in relation to themselves and their partner. In support of the matching hypothesis, partners' perceptions of their own and their partner's facial and bodily attractiveness were significantly correlated. The positive illusions effect and the love is blind bias were also evident, with participants' ratings of partners being greater than both their own self‐ratings and their partner's self‐ratings of physical attractiveness. Although our findings suggest that these phenomena related to perceptions of physical attractiveness are evident across cultures, further studies are required.