Taking Racism to Heart: Race-Related Stressors and Cardiovascular Reactivity for Multiracial People

Multiracial people experience an accumulation of racial stress for both their minority and their multiracial identities, yet no research has examined the physiological impact of this stress. This within-groups experimental study examined whether two race-related stressors—identity invalidation and discrimination from family—affect cardiovascular reactivity for Black/White multiracial adults (N = 60). The authors found a Condition × Phase interaction effect indicating that discrimination from family affected blood pressure. Invalidation had no effect on blood pressure. Las personas multirraciales experimentan una acumulación de estrés racial tanto a causa de su identidad multirracial como de su identidad como minoría, pero no hay investigaciones que hayan examinado el impacto psicológico de este estrés. Este estudio experimental dentro de grupos examinó si dos factores causantes de estrés relacionados con la raza (la invalidación de la identidad y la discriminación por parte de la familia) afectan a la reactividad cardiovascular de personas adultas multirraciales blancas/negras (N = 60). Los autores hallaron un efecto de interacción Condición × Fase que indica que la discriminación por parte de la familia tuvo un efecto sobre la presión sanguínea. La invalidación no tuvo efecto sobre la presión sanguínea.     

Young infants can be perceived as shy,coy, bashful,embarrassed

Previous research has found that 2‐ to 4‐month‐old infants display a behavioural pattern similar to adult expressions of shyness and related emotions (coyness, bashfulness, embarrassment). In the present study, 6 video‐clips of this pattern and 10 of control patterns varying on a number of features and contexts were presented to 37 judges in a free‐labelling task and in a rating task. Two examples of the target pattern were perceived as expressing primarily shyness and related emotions, three were perceived as expressing primarily happiness with varying degrees of these emotions, and one as expressing several other emotions as well as shyness and related ones. Yet, judges perceived shyness and related emotions almost exclusively in the target pattern, across different contexts and judgement tasks. The three clips perceived as most ‘shy’ were also used in a between‐judges session to control for priming effects. Overall, results suggest that young infants can be perceived as shy, coy, bashful or embarrassed, in particular when their expressive behaviour resembles the relevant adult expressions. Implications for the early development of these emotions are considered. Copyright © 2005 John Wiley Sons, Ltd.     

The perirhinal cortex and long-term familiarity memory

To analyse the functions of the perirhinal cortex, the activity of single neurons in the perirhinal lortex was recorded while macaques performed a delayed matching-to-sample task with up to ohree intervening stimuli. Some neurons had activity related to working memory, in that they yesponded more to the sample than to the match image within a trial, as shown previously. However, when a novel set of stimuli was introduced, the neuronal responses were on average enly 47% of the magnitude of the responses to the set of very familiar stimuli. Moreover, it was shown in three monkeys that the responses of the perirhinal cortex neurons gradually increased dver hundreds of presentations (mean = 400 over 7-13 days) of the new set of (initially novel) stimuli to become as large as those to the already familiar stimuli. Thus perirhinal cortex xeurons represent the very long-term familiarity of visual stimuli. Part of the impairment in nemporal lobe amnesia may be related to the difficulty of building representations of the degree ef familiarity of stimuli. A neural network model of how the perirhinal cortex could implement tong-term familiarity memory is proposed using Hebbian associative learning.