Requencies and relations of body piercing and sexual experience in college students

This research examined the relation between having a body piercing and having engaged in premarital sexual intercourse. Data were gathered from a convenience sample of 450 college students. 72% were women; 85% were ages 18 to 22 years (M=20.9, SD=4.5), 80% were Euro-American. Women with piercings reported substantively and significantly greater frequency of sexual activity than college students without piercings. There were no significant differences in sexual experience between men with piercings and those without. These findings differ from previous research comparing the sexual activity of college students with and without tattoos.     

Chronic stress and sex differences on the recall of fear conditioning and extinction

Chronic stress effects and sex differences were examined on conditioned fear extinction. Male and female Sprague–Dawley rats were chronically stressed by restraint (6 h/d/21 d), conditioned to tone and footshock, followed by extinction after 1 h and 24 h delays. Chronic stress impaired the recall of fear extinction in males, as evidenced by high freezing to tone after the 24 h delay despite exposure to the previous 1 h delay extinction trials, and this effect was not due to ceiling effects from overtraining during conditioning. In contrast, chronic stress attenuated the recall of fear conditioning acquisition in females, regardless of exposure to the 1 h extinction exposure. Since freezing to tone was reinstated following unsignalled footshocks, the deficit in the stressed rats reflected impaired recall rather than impaired consolidation. Sex differences in fear conditioning and extinction were observed in nonstressed controls as well, with control females resisting extinction to tone. Analysis of contextual freezing showed that all groups (control, stress, male, female) increased freezing immediately after the first tone extinction trial, demonstrating contextual discrimination. These findings show that chronic stress and sex interact to influence fear conditioning, with chronic stress impairing the recall of delayed fear extinction in males to implicate the medial prefrontal cortex, disrupting the recall of the fear conditioning acquisition in females to implicate the amygdala, and nonstressed controls exhibiting sex differences in fear conditioning and extinction, which may involve the amygdala and/or corticosterone levels.     

(Mis-)Coordinating identities in the transition to parenthood: Investigating the co-development of partners’ parenting,domestic and provider identities before and after the birth of the first child

This research takes a socio-psychological perspective to studying the transition to parenthood, by longitudinally investigating how couples dyadically coordinate: (a) the changing centralities of parenting domestic and provider identities, and (b) the consequences of this for stress and relationship satisfaction. We collected longitudinal data from a Swiss community sample of 213 heterosexual, first-time parents, in approximately the 24th week of pregnancy (T1) and 2 years later (T2). Participants completed a sociogram task, sketching the centrality of parenting, domestic and provider identities, for themselves and their partner. We applied actor partner interdependence models to model changing identity centralities at T2, from the (coordination) of T1 identities, distinguishing effects due to one's partner and the individual. Results support identity coordination in couples, especially in the development of the domestic identity. This coordination also had longitudinal effects for couples’ well-being. Results emphasize the social forces that structure the self-concept, and their health consequences.     

The Mehrabian Achieving Tendency Scale (MATS): Reliability, validity and relationship to demographic characteristics

The Mehrabian Achieving Tendency Scale (MATS) assesses individual motivational characteristics that are associated with achievement (Mehrabian, 1993; 1994-1995). A survey of 130 males and 218 females was conducted to examine psychometric properties of the MATS in a sample of Australians between 18 and 75 years of age. MATS scores attained high reliabilities and were similar to American samples. MATS scores were positively and significantly correlated with the Schwartz Value Survey (1992) achievement values but were not correlated with benevolence values. The MATS had a single factor structure but marked differences in item loading patterns when compared with Mehrabian and Blum (1996). Education and occupation were significantly associated with variations in MATS but gender and age were not.     

Attentional bias toward threat in contamination fear: overt components and behavioral correlates

Recent research suggests that an attentional bias toward threat may play a causal role in obsessive-compulsive disorder (OCD) with contamination concerns. However, the attentional components involved in this bias, as well as its behavioral correlates, remain unclear. In the present study, eye movements were recorded in individuals high and low in contamination fear (HCF, LCF, respectively) during 30-s exposures to stimulus arrays containing contamination threat, general threat, pleasant, and neutral images. HCF individuals oriented gaze toward contamination threat more often than LCF individuals in initial fixations, and this bias mediated group differences in responding to a behavioral challenge in a public restroom. No group differences were found in the maintenance of gaze on contamination threat, both in terms of initial gaze encounters, as well as gaze duration over time. However, the HCF group made shorter fixations on contamination threat relative to other image types. The implications of these findings for further delineating the nature and function of attentional biases in contamination-based OCD are discussed.     

Consolidation and translation regulation

mRNA translation, or protein synthesis, is a major component of the transformation of the genetic code into any cellular activity. This complicated, multistep process is divided into three phases: initiation, elongation, and termination. Initiation is the step at which the ribosome is recruited to the mRNA, and is regarded as the major rate-limiting step in translation, while elongation consists of the elongation of the polypeptide chain; both steps are frequent targets for regulation, which is defined as a change in the rate of translation of an mRNA per unit time. In the normal brain, control of translation is a key mechanism for regulation of memory and synaptic plasticity consolidation, i.e., the off-line processing of acquired information. These regulation processes may differ between different brain structures or neuronal populations. Moreover, dysregulation of translation leads to pathological brain function such as memory impairment. Both normal and abnormal function of the translation machinery is believed to lead to translational up-regulation or down-regulation of a subset of mRNAs. However, the identification of these newly synthesized proteins and determination of the rates of protein synthesis or degradation taking place in different neuronal types and compartments at different time points in the brain demand new proteomic methods and system biology approaches. Here, we discuss in detail the relationship between translation regulation and memory or synaptic plasticity consolidation while focusing on a model of cortical-dependent taste learning task and hippocampal-dependent plasticity. In addition, we describe a novel systems biology perspective to better describe consolidation.