Linguistic lateralization and asymmetries in interhemispheric transmission time

The Interhemispheric Conduction Delay (ICD) theory of cerebral lateralization claims that longer interhemispheric transfer times (IHTT's) should result in greater functional lateralization for time-critical tasks. IHTT was estimated in 40 normal participants using both a visual and an auditory version of the Poffenberger (1912) paradigm. There was a significant response-hand by side-of-presentation interaction, and the length of IHTT for auditory information being transferred from the right to left hemisphere was significantly related to linguistic lateralization as assessed with a dichotic-listening task. These results support the ICD theory of cerebral lateralization.     

Female advantage for spatial location memory in both static and dynamic environments

A female advantage has previously been found for spatial location tests of object memory. Previous studies have used static, 2-D tasks to test this advantage. This study used a computerized adaptation of the game Concentration to test object location memory in both a static and dynamic array of 24 pairs of line drawings. The dynamic version of this task was used to better reflect the dynamic real world in which we usually use object location memory. Consistent with previous research, we observed a female advantage. This advantage was found to a similar extent in both the static and dynamic versions of the task. The female advantage for object location memory is a concrete advantage in spatial cognition that females show on the Concentration Task, regardless of the nature of the presentation environment.     

Visual Attention Patterns of Socially Anxious Individuals When Using Facebook: An Eye Tracking Study

Social networking sites (SNSs) are an increasingly used medium for social interactions. For socially anxious individuals, SNS-based communication is often preferred over traditional face-to-face socializing. Yet, research on SNSs usage and social anxiety is still less common, with extant studies being mostly correlational among healthy nonanxious participants. Conversely, here, we examined differences in actual gaze patterns to social and nonsocial stimuli between socially anxious and nonanxious individuals while using Facebook. Socially anxious and nonanxious student participants freely viewed a genuine Facebook profile page designed for the present study, for 3.5 minutes, containing 12 social and 12 nonsocial picture stimuli. Gaze patterns on social and nonsocial areas of interest (AOIs) were explored. Subjective uneasiness experienced when viewing the social pictures and state anxiety were also assessed. Finally, 2 weeks following the task, we evaluated participants’ willingness to participate in a follow-up (fictitious) study that required them to passively view their own Facebook profile, and then to actively use it. Results showed that compared with nonanxious participants, socially anxious participants demonstrated a viewing pattern less favoring social pictures, reflecting an attentional avoidance tendency. A significant inverse correlation between subjective uneasiness and percent of dwell time spent on the social AOI emerged. Socially anxious participants also reported higher levels of state anxiety, which was significantly positively correlated with uneasiness scores. Finally, socially anxious participants were also less willing to actively use their Facebook profile page. This study suggests that social anxious individuals are characterized by attentional and behavioral avoidance tendencies when using Facebook.     

The effect of adrenalectomy on Fos expression in vasopressinergic and oxytocinergic neurons in response to stress in the rat

This study evaluated the responses of vasopressin (AVP) and oxytocin (OT) neurons to alterations in hypothalamo-pituitary axis activity by adrenalectomy (ADX) or after restraint stress compared with basal conditions. Wistar male rats were perfuse-fixed by cardiac perfusion under anesthesia 3 h, 1, 3 and 14 days after ADX or Sham surgery. Coronal hypothalamic sections were used for evaluation of Fos, AVP and OT expression by immunohistochemistry. Under basal conditions and after stress, Fos-AVP double labeling showed no difference in the magnocellular subdivisions of the paraventricular nuclei (PVN) or in the supraoptic nuclei (SON), suggesting that the magnocellular AVP system is unlikely to contribute to ACTH secretion after restraint in both Sham and ADX rats. Fos-AVP double labeling in the parvocellular medial paraventricular nucleus (PaMP) in ADX groups was increased after 3 h in basal conditions, and in all periods after restraint stress. There were no differences between Sham and ADX groups in Fos-OT double labeling in any subdivision of the PVN; however, in the SON, the number of Fos-OT double labeled cells was increased at all time-points after stress in the ADX group. Fos expression was increased in the PaMP after 3 h and after restraint stress in the Sham and ADX groups, especially in the ADX group. In conclusion, Fos expression in different cell populations of the PVN can be differentially regulated by short- and long-term absence of glucocorticoid negative feedback and also by stress-related excitatory and/or inhibitory neural inputs. The Fos-AVP double labeling findings in the PaMP also indicate a minor participation of these vasopressinergic neurons in the regulation of the HPA axis after ADX.     

The oblique effect and three-dimensional shape

The classical oblique effect refers to the finding that observers are faster and more accurate in discriminating the orientation of a line or edge when it is at or near vertical or horizontal than when it is at an oblique orientation (Appelle, 1972; Mach, 1861). Based on the finding that observer sensitivity to orientation of simple symmetric shapes like an ellipse or the letter "X" also exhibits an oblique effect, Li and Westheimer (1997) suggested that the effect does not arise solely from inequality of simple orientation-tuned receptors in early visual processing, but also involves later orientation processing that can encompass more complex inputs such as shape axes. In this work, we examined how the oblique effect impacts three-dimensional shapes defined by texture cues.     

The detection of fear-relevant stimuli: are guns noticed as quickly as snakes?

Potentially dangerous stimuli are important contenders for the capture of visual-spatial attention, and it has been suggested that an evolved fear module is preferentially activated by stimuli that are fear relevant in a phylogenetic sense (e.g., snakes, spiders, angry faces). In this study, a visual search task was used to test this hypothesis by directly contrasting phylogenetically (snakes) and ontogenetically (guns) fear-relevant stimuli. Results showed that the modern threat was detected as efficiently as the more ancient threat. Thus, both guns and snakes attracted attention more effectively than neutral stimuli (flowers, mushrooms, and toasters). These results support a threat superiority effect but not one that is preferentially accessed by threat-related stimuli of phylogenetic origin. The results are consistent with the view that faster detection of threat in visual search tasks may be more accurately characterized as relevance superiority effects rather than as threat superiority effects.     

Serum cortisol,testosterone, and testosterone-binding globulin responses to competitive fighting in human males

Levels of circulating cortisol, testosterone, and testosterone-binding globulin were measured in 15 male wrestlers in relation to wrestling bouts and their outcomes. Concentrations of cortisol and testosterone increased consistently during wrestling bouts, while levels of testosterone-binding globulin dropped. Winners of competive matches showed greater increases in both cortisol and testosterone than losers. These findings indicate that humans, like other social mammals, may undergo specific endocrine changes in response to victory or defeat.     

Law,Ethics, and the Needs of History: Mendelssohn,Krochmal, and Moral Philosophy

Although the role of ethics in modern Jewish thought has been widely explored, major works by foundational philosophers remain largely absent from such discussions. This essay contributes to the recovery of these voices, focusing on the Hebrew writings of Moses Mendelssohn (1729–1786) and Nachman Krochmal (1785–1840). I argue that these texts reveal the existence of a shared ethical project animating these founding philosophical voices of Jewish modernity, and that reconstructing their claims contributes to broader conversations about the relationship between ethics and law. Mendelssohn and Krochmal present Jewish law as addressing needs emerging from the history of moral philosophy—from the modern histories of Platonic and Aristotelian ethics. Moreover, my reading highlights these thinkers’ ongoing relevance, suggesting that their work illuminates the role of law in ethical cultivation.