Effects of daily and acute restraint stress during lactation on maternal aggression and behavior in mice

A decreased reactivity to stressors during lactation might heighten the expression of maternal care (including defense of offspring) by minimizing the extent to which stress can impact maternal care. Although stressors applied during pregnancy have variable effects on maternal aggression (or defense of offspring), to date no study has examined the effects of stress applied during the postpartum period on maternal aggression. In this study, we examined the effects of both daily and acute restraint stress (30 min) applied postpartum on maternal aggression and other maternal behaviors. Daily restraint (ending 2 h before testing) did not alter any measure of maternal behavior, including nursing, licking and grooming of pups and pup retrieval, or any measure of maternal aggression. In contrast, acute stress significantly impaired total time aggressive and number of attacks, but pup retrieval was normal. c-Fos levels were significantly elevated in a number of brain regions in association with acute stress, including lateral septum (LS), caudal periaqueductal gray and medial amygdala (MeA), suggesting possible sites where stress reactivity could alter aggression. Together, the results indicate that acute restraint stress impairs maternal aggression and provide a starting point for future studies examining how stress reactivity pathways may intersect with maternal aggression pathways.     

Memory of the traumatic event as a risk factor for the development of PTSD: lessons from the study of traumatic brain injury

Traumatic memories, and the mechanisms by which they operate, continue to occupy a central role in the scientific investigation of risk factors for the development of posttraumatic stress disorder (PTSD). However, empirically based studies are constrained by practical and ethical considerations and are limited to naturalistic models. Consequently, the paradigms most appropriate for the exploration of the relationship between traumatic memories and PTSD have been identified in conditions involving traumatic events where memories may be compromised. Indeed, traumatic brain injury, a condition that is commonly associated with memory impairment, has often been utilized as a naturally occurring model for the study of traumatic memory and its contribution to the development of PTSD. This article presents a critical review of these research efforts and discusses their theoretical and clinical implications.     

内蒙古喀喇沁旗农民合作医疗支付意愿与支付能力分析

目的 通过对内蒙古自治区喀喇沁旗三个乡290户农民的调查,分析影响农民支付意愿和支付能力的主要因素。方法 使用相关回归分析。结果 发现农民对合作医疗支付意愿的需求价格弹性系数为-0.68,支付意愿与支付能力相互制约,统计学上有意义的影响因素包括农村居民的收入水平和保险意识。结论 说明农民对合作医疗的需求价格弹性仍属于缺乏弹性类,仍然需要进一步提高农民对合作医疗的支付意愿和支付能力。     

Effects of text difficulty and adults' age on relative calibration of comprehension

Weaver and Bryant (1995) proposed the optimum effort hypothesis, suggesting that undergraduate students were better able to predict comprehension when text materials matched their reading level (grade 12) as opposed to being too easy or too difficult (Weaver and Bryant did not assess the actual reading level of their participants). In the study, we examined the reading level and accuracy of performance prediction of both younger and older adults using Weaver and Bryant's materials. Regardless of our participants' high reading levels (grade 14 and above), they still predicted performance best when texts were written at around the grade 12 level, failing to support the optimum effort hypothesis.     

Ophthalmological problems of the premature infant

Preterm infants are more likely than term infants to have significant abnormalities of all parts of the visual system leading to reduced vision. The most common problem is retinopathy of prematurity (ROP). The frequency and severity of this disorder is inversely related to gestational age. Damage ranges from minor to catastrophic. Preterm infants also have higher rates of amblyopia, strabismus, refractive error, and cortical visual impairment. The later problem is largely associated with neonatal brain injury. Years later, these children may develop glaucoma and retinal detachments.     

Evaluations,Attitude Similarity,and Interpersonal Attraction: Testing the Hypothesis of Weighting Interference Across Responses

The greater effect of negative than positive stimuli on judgments—the positive-negative asymmetry (PNA)—is rather pervasive. However, the effects of the valence of evaluations of the participant by the partner and attitude similarity between them on attraction have been inconsistent with PNA. The hypothesis that the weighting rule instigated by the first response interferes with the weighting rule normally expected for the second response was tested. As hypothesized, evaluations and attitude similarity interacted when attraction response was assessed prior to competence response but not when competence response was assessed first. The effects in the first measured response fully mediated the effects in the second measured response but not vice versa. Implications of the finding for attraction and PNA are discussed.     

Standing Out From the Crowd: How Comparison to Prototypes Can Decrease Health-Risk Behavior in Young Adults

This research tested whether social comparison can encourage adolescents to make less risky health decisions. Two studies demonstrated that when young adults compare themselves with drinkers, they become less willing to drink if they perceive dissimilarity between themselves and those drinkers. When participants in Study 1 compared with someone who drinks regularly, their perceived similarity to prototypical drinkers was positively related to their willingness to drink. In Study 2, participants identified or contrasted themselves with prototypical drinkers; those encouraged to contrast who also felt less similar to the prototype reported less willingness to drink. These studies support the prototype/willingness model's assumption that prototypes affect willingness to drink through social comparison.     

Not Staying Home: The Experience of Uzbek Women Crisis Counselors and Therapists

This study explored the experiences of Uzbek women therapists and counselors working to end violence against women through their involvement in nongovernmental organizations. A content analysis was used, which elicited four themes: (a) participants' early interactions provided them with an awareness of gender injustices that led them into adult leadership roles with the support of family members; (b) motivation to work with nongovernmental organizations developed due to perceived barriers that impeded women's access to resources and personal freedoms; (c) participants struggled with how to create crisis centers without a grassroots foundation and with the limitations placed on them by the Uzbek government; and (d) the paradox of feminism: participants held views of Western feminism that both inspired and disturbed them, resulting in distance from feminist identities but general respect for its philosophies.