Lateralized suckling in domestic horses (Equus caballus)

Brain lateralization enables preferential processing of certain stimuli and more effective utilization of these stimuli in either the left or the right cerebral hemisphere. Horses show both motor and sensory lateralization patterns. Our aim was to determine whether a lateralized response could be detected in foals during the naturally side-biased behaviour, suckling. The foals’ preferred suckling side could be the effect of either visual or motor lateralization. In the case of a visual lateralized response, foals are expected to suck more often from the mother’s right side, so potential danger can be detected by the better adapted right hemisphere (i.e. left eye). Motor lateralization can be identified when a foal will suck predominantly from one side, either left or right. We found no population trend in the preferred suckling side, but we detected significant differences amongst individual foals. One-third (35.4 %) of 79 foals showed a strong, either right or left side preference which increased with age. The mothers did not influence the foals’ suckling side preferences either by side-biased rejection or termination of suckling. According to our findings, a general pattern of sucking with the left eye open for better danger detection and recognition is unlikely in foals up to 7 months old. Foals of this age are probably young or fully focused on suckling and rely on their mothers’ vigilance. Individual side preferences amongst foals are suggested to be based on motor lateralization.     

The Problem of Behaviour Change: From Social Norms to an Ingroup Focus

Social norms are of increasing interest to public policy experts and those conducting behaviour change interventions (e.g. safe driving, recycling). While there is agreement that social norms play a central role in explaining behaviour, such consensus is lacking when it comes to explaining the process through which this occurs. Economics, social marketing and political science focus on individual self‐interest and goal satisfaction and social (dis)approval. In contrast social psychology also incorporates collective interests through its analysis of social identity and ingroup processes. To fully understand behaviour change, it is argued that greater engagement is needed with the links between shifts in social identity, and ingroup norms. As definitions of who “we” are shift, so too does what “we” do. Implications for behaviour change interventions are discussed.     

Acquisition of spatial knowledge in different urban areas: evidence from a survey analysis of adolescents

We herein explore the perception of the geographic environment and analyse the mechanisms that constrain the cognitive processing of spatial information in general. Our guiding theoretical background assumption is that the structure of the spatial environment is a cognitively robust and mutually constrained threefold system relating (1) cognitive topology (comprised of a path and place structure of spatial information and constrained by reference frame-based factors), (2) experience-based functional knowledge (including the effects of socio-economic factors, frequency and familiarity) and (3) linguistic representations (primarily encoded in the prepositional system of a natural language). Here, we focus on (2), i.e. the effect of functional knowledge on the process of acquiring spatial knowledge. We empirically tested adolescents aged 12–17 years to explore the interaction between frequency, familiarity and functional knowledge from a developmental point of view. The social factors we explore are precisely defined and parameterized in our results (exposure to a particular urban area, place of residence, gender, age and factors relating to the environmental and social quality of the local area). Our research shows that there are divergences between the so-called objective topology and the cognitive typology of the urban environment that are significantly constrained by intensity of interactions with environment, number of functionally significant places within particular area and age from a developmental perspective in terms of spatial knowledge acquisition.     

Confinement has no effect on visual space perception: The results of the Mars-500 experiment

People confined to a closed space live in a visual environment that differs from a natural open-space environment in several respects. The view is restricted to no more than a few meters, and nearby objects cannot be perceived relative to the position of a horizon. Thus, one might expect to find changes in visual space perception as a consequence of the prolonged experience of confinement. The subjects in our experimental study were participants of the Mars-500 project and spent nearly a year and a half isolated from the outside world during a simulated mission to Mars. The participants were presented with a battery of computer-based psychophysical tests examining their performance on various 3-D perception tasks, and we monitored changes in their perceptual performance throughout their confinement. Contrary to our expectations, no serious effect of the confinement on the crewmembers’ 3-D perception was observed in any experiment. Several interpretations of these findings are discussed, including the possibilities that (1) the crewmembers’ 3-D perception really did not change significantly, (2) changes in 3-D perception were manifested in the precision rather than the accuracy of perceptual judgments, and/or (3) the experimental conditions and the group sample were problematic.     

Infants’ discrimination of crossed and uncrossed horizontal disparity

In a series of preferential-looking experiments, infants 5 to 6 months of age were tested for their responsiveness to crossed and uncrossed horizontal disparity. In Experiments 1 and 2, infants were presented with dynamic random dot stereograms displaying a square target defined by either a 0.5° crossed or a 0.5° uncrossed horizontal disparity and a square control target defined by a 0.5° vertical disparity. In Experiment 3, infants were presented with the crossed and the uncrossed horizontal disparity targets used in Experiments 1 and 2. According to the results, the participants looked more often at the crossed (Experiment 1), as well as the uncrossed (Experiment 2), horizontal disparity targets than at the vertical disparity target. These results suggest that the infants were sensitive to both crossed and uncrossed horizontal disparity information. Moreover, the participants exhibited a natural visual preference for the crossed over the uncrossed horizontal disparity (Experiment 3). Since prior research established natural looking and reaching preferences for the (apparently) nearer of two objects, this finding is consistent with the hypothesis that the infants were able to extract the depth relations specified by crossed (near) and uncrossed (far) horizontal disparity.     

Epistemic justification in the context of pursuit: a coherentist approach

The aim of this paper is to offer an account of epistemic justification suitable for the context of theory pursuit, that is, for the context in which new scientific ideas, possibly incompatible with the already established theories, emerge and are pursued by scientists. We will frame our account paradigmatically on the basis of one of the influential systems of epistemic justification: Laurence Bonjour’s coherence theory of justification. The idea underlying our approach is to develop a set of criteria which indicate that the pursued system is promising of contributing to the epistemic goal of robustness of scientific knowledge and of developing into a candidate for acceptance. In order to realize this we will (a) adjust the scope of Bonjour’s standards—consistency, inferential density, and explanatory power, and (b) complement them by the requirement of a programmatic character. In this way we allow for the evaluation of the “potential coherence” of the given epistemic system.     

Józef M. Bocheński and the categorial reconstruction of concepts in the Lvov–Warsaw School

Studies in East European Thought - In this article, Józef M. Bocheński is presented as a representative of the methodological tendencies of the Lvov–Warsaw School (LWS). Special...     

How to do Better N400 Studies: Reproducibility,Consistency and Adherence to Research Standards in the Existing Literature

Neuropsychology Review - Given the complexity of ERP recording and processing pipeline, the resulting variability of methodological options, and the potential for these decisions to influence study...