Tyrosine ameliorates heat induced delay in event related potential P300 and contingent negative variation

The efficacy of tyrosine, a catecholamine precursor, as a countermeasure in the reduction of cognitive decline during heat exposure (HE) using event-related potential P300, and contingent negative variation (CNV) was evaluated. Ten healthy males, age 20–30 years participated in the study. Volunteers received placebo or tyrosine (6.5 g) 90 min prior to HE (1.5 h in 45 °C + 30% RH). P300 latency was significantly increased (p < 0.01) during exposure with placebo, which was reduced significantly (p < 0.01) after tyrosine supplementation. There was an increase in CNV M100 latency (p < 0.05) and reaction time (p < 0.01) and decrease in M100 amplitude (p < 0.01) during HE with placebo, which returns to near normal level with the tyrosine administration. A significantly higher plasma norepinephrine (p < 0.05), dopamine and epinephrine levels were detected in tyrosine supplemented group post heat exposure. HE increases the brain catecholamine activity thereby reduces the plasma norepinephrine and dopamine level leading to a reduction in cognitive performances. Tyrosine supplementation increases the catecholamine level and reduces the impairment of cognitive performance during HE.     

3-D eye movement analysis

This paper presents a novel three-dimensional (3-D) eye movement analysis algorithm for binocular eye tracking within virtualreality (VR). The user’s gaze direction, head position, and orientation are tracked in order to allow recording of the user’s fixations within the environment. Although the linear signal analysis approach is itself not new, its application to eye movement analysis in three dimensions advances traditional two-dimensional approaches, since it takes into account the six degrees of freedom of head movements and is resolution independent. Results indicate that the 3-D eye movement analysis algorithm can successfully be used for analysis of visual process measures in VR. Process measures not only can corroborate performance measures, but also can lead to discoveries of the reasons for performance improvements. In particular, analysis of users’ eye movements in VR can potentially lead to further insights into the underlying cognitive processes of VR subjects.     

Effect of failure/success feedback and the moderating influence of personality on reward motivation

While motivation to pursue goals is often assumed to be a trait-like characteristic, it is influenced by a variety of situational factors. In particular, recent experiences of success or failure, as well as cognitive responses to these outcomes, may shape subsequent willingness to expend effort for future rewards. To date, however, these effects have not been explicitly tested. In the present study, 131 healthy individuals received either failure or success feedback on a cognitive task. They were then instructed to either ruminate or distract themselves from their emotions. Finally, they completed the Effort Expenditure for Rewards Task, a laboratory measure of reward motivation. Results indicate that participants who received failure feedback relied more strongly on the reward magnitude when choosing whether to exert greater effort to obtain larger rewards, though this effect only held under conditions of significant uncertainty about whether the effort would be rewarded. Further, participants with high levels of trait inhibition were less responsive to reward value and probability when choosing whether to expend greater effort, results that echo past studies of effort-based decision-making in psychological disorders.     

Alternating prism exposure causes dual adaptation and generalization to a novel displacement

In two experiments, we examined the hypothesis that repeatedly adapting and readapting to two mutually conflicting sensory environments fosters the development of a separate adaptation to each situation (dual adaptation) as well as an increased ability to adapt to a novel displacement (adaptive generalization). In the preliminary study, subjects alternated between adapting their visuomotor coordination to 30-diopter prismatic displacement and readapting to normal vision. Dual adaptation was observed by the end of 10 alternation cycles. However, an unconfounded test of adaptive generalization was prevented by an unexpected prism-adaptive shift in preexposure baselines for the dual-adapted subjects. In the primary experiment, the subjects adapted and readapted to opposite 15-diopter displacements for a total of 12 cycles. Both dual adaptation and adaptive generalization to a 30-diopter displacementwere obtained. These findings may be understood in terms of serial reversal learning and “learning to learn.”     

Parent and Primary Care Provider Priorities for Wellness in Early Childhood: A Discrete Choice Experiment

Journal of Child and Family Studies - Guidelines recommend that primary care clinicians address a broad range of wellness topics, but time constraints limit clinicians’ ability to address...     

In defence of an Indian approach to the psychology of emotion

The indigenous Indian approach to the psychology of emotions, which originated in Bharata's ancient classical work called the Nāṭyaśāstra, is articulated and its conceptual structure is situated in the contemporary psychological scholarship and the discourse on emotion. In particular an analysis of Bhakti Rasa is presented to illustrate how life gets transformed and lifted to higher levels of spirituality. The issues pertaining to theory and method in appreciating psychological reality are examined. It is concluded that emotions are complex phenomena that need different “paradigms” appropriate for understanding the different aspects.     

The Foot-Reading Cult of Japan

Ho-no-Hana-Sanpogyo was a Japanese new religious movement referred to as the “foot-reading cult” in the media. Its founder, Fukunaga Hogen, claimed to have divine authority and the ability to diagnose physical illness by studying the soles of an individual’s feet. The purpose of this paper is to provide an overview of the history of Ho-no-Hana-Sanpogyo and Fukunaga’s practice of foot reading.     

Caregiving representations in war conditions: Associations with maternal trauma,mental health,and mother–infant interaction

Risk features in mothers’ caregiving representations remain understudied in dangerous environments where infants most urgently need protective parenting. This pilot study examines the feasibility of a novel coding system for the Parent Development Interview (PDI) interview (ARR, Assessment of Representational Risk) in assessing 50 war-exposed Palestinian mothers’ caregiving representations. First, we explored the content and structure of risks in the representations. Second, we examined associations between the high-risk representations, mothers’ pre- and postnatal exposure to traumatic war events (TWE), depressive and post-traumatic stress disorder (PTSD) symptoms, and self-rated emotional availability (EA) with their 1-year-old infants. Following three dimensions of high-risk caregiving representations were identified: self/dyadic dysregulation, unavailable, and fearful. Mothers’ prenatal depressive symptoms were associated with dysregulating and fearful representations, and their postnatal PTSD with fearful representations. TWE were not associated with the high-risk representations. Moreover, mothers of boys reported more fearful representations, and mothers with financial difficulties reported more unavailable representations. TWE and high-risk representations were not associated with EA. However, qualitative analysis of the representations indicated risks in the mother–infant relationship. Further, older mothers and mothers with postnatal PTSD reported lower EA. Cultural variance in caregiving representations and the use of self-report measures among traumatized mothers are discussed.     

Predictors of Farmers’ Market Shopping among People Receiving Supplemental Nutrition Assistance Program Benefits

Promoting use of farmers’ markets (FMs) is a promising community‐level strategy to increase access to nutritious foods such as fruits and vegetables. Yet, FM shopping among people with Supplemental Nutrition Assistance Program (SNAP) benefits remains low. This research examined predictors of FM shopping among SNAP recipients living within 1 mile of a FM. A cross‐sectional survey of SNAP participants (N = 270) was conducted in 2015 in Cleveland and East Cleveland, OH, USA. Multinomial regression and zero‐truncated Poisson regression analyses were conducted to examine factors associated with FM shopping. Results indicate 48% reported shopping at a FM at least once in the past year, 26% had shopped at a FM before, but not in the last year, and 26% had never shopped at a FM. The multivariable analyses found awareness of FMs and a healthy food incentive program, and four dimensions of healthy food access are significantly associated with FM shopping among SNAP recipients. The food access dimensions included service delivery, spatial‐temporal, personal, and social access. Findings highlight modifiable leverage points for improving the reach of FMs among low‐income populations.