When Sharing Is Not Caring: Does (un)Certainty About Bill Payment Method Lead Diners to Consume More and Spend More Money?

Previous work has demonstrated that unacquainted participants in an experimental, restaurant‐like setting consume more when they know in advance that the bill will be split evenly rather than paid according to individual consumption. Real life, however, often differs from these experimental settings in two important ways. First, unlike random groups of participants, diners who eat together are frequently friends or colleagues. Second, payment method (even vs. individual payment) is usually unknown (i.e. uncertain) at the time people place their orders, and is determined when the check arrives. The current research tests the ecological validity of the association between consumption amount and payment method. Study 1 was conducted in a natural setting with organic groups of diners. Some were asked to state their desired payment method before ordering (Certain condition); others did so only after asking for the check (Uncertain condition). In both conditions, even payment (as opposed to individual payment) was associated with greater consumption amount. However, overall, consumption amount was lower among diners in the Uncertain condition than among those in the Certain condition. Study 2 presents a controlled follow‐up experiment showing that eliminating diners' prior expectations regarding the payment method—by informing them that the payment method will be randomly determined after the consumption decision—eliminates the relationship between payment method and consumption amount. This study further indicates that when diners are uncertain what the payment method will be, even bill‐splitting has negative implications for their subsequent social interactions, expressed in retribution tendencies. Copyright © 2016 John Wiley & Sons, Ltd.     

人际情境对幼儿联合Simon效应的影响机制

联合Simon效应是考察幼儿共同表征能力的一个有效指标,本研究采用联合Simon任务范式通过两个实验考察幼儿联合Simon效应稳定产生的年龄阶段以及不同人际情境对该效应的影响机制。实验1首先以3个年龄段幼儿为研究对象来考察幼儿联合Simon效应产生的年龄阶段,以揭示共同表征能力的发生发展趋势。实验2在实验1基础上以出现稳定联合Simon效应的5岁幼儿为研究对象,进一步考察该能力水平是否受到人际情境的影响及背后的机制。结果表明,与3岁相比,4岁幼儿开始出现联合Simon效应,但尚不稳定,5岁幼儿的联合Simon效应达到更加稳定水平;不同人际情境对幼儿的共同表征能力产生影响,相较合作情境,竞争情境对幼儿联合行动的共同表征能力有抑制作用。本研究结果很好地支持了参考编码理论,并拓宽了对共同表征理论的理解。     

High dose alcohol consumption predicts less reduction in post-traumatic stress symptoms after a campus mass shooting

Background: Recognizing that alcohol might affect subsequent processing of trauma-related information, this study examined whether high dose alcohol consumption (HDAC) following a campus mass shooting affected the relation between shooting exposure and post-traumatic stress symptoms (PTSS).

Methods: Female participants (N?=?691) recorded levels of physical exposure to the shooting event, alcohol use, and PTSS 1 month following the shooting event and 8 months later.

Results: No evidence was found to suggest that pre-shooting HDAC moderated the relationship between trauma exposure and PTSS 1 month following the shooting. HDAC in the month following the shooting predicted less resolution of PTSS 8 months later. Specifically, at higher (but not lower) levels of HDAC, shooting exposure was associated with less reduction in PTSS from 1 to 8 months post-trauma. Several alternate explanations were ruled out.

Conclusions: Less reduction in PTSS seems to occur at high levels of both shooting exposure and HDAC. Theoretical implications and directions for future research are discussed.     

Drinking to regulate negative romantic relationship interactions: The moderating role of self-esteem

A 30-day diary study examined the relations among trait self-esteem, negative romantic relationship interactions, and alcohol consumption. Multilevel analyses revealed that people with low trait self-esteem (compared with people with high trait self-esteem) drank more on days when they experienced more negative relationship interactions with their romantic partners. In addition, daily increases in state self-esteem buffered people with low trait self-esteem from the desire to drink in response to negative romantic relationship interactions. In contrast, participants with high and low self-esteem both decreased their drinking in response to negative non-romantic relationship events, but people with low self-esteem decreased their drinking less. These findings suggest that people with low trait self-esteem may drink as a way to regulate unfulfilled needs for acceptance.     

The road to two theorems of logic

Work on how to axiomatize the subtheories of a first-order theory in which only a proper subset of their extra-logical vocabulary is being used led to a theorem on recursive axiomatizability and to an interpolation theorem for first-order logic. There were some fortuitous events and several logicians played a helpful role.     

成人股骨头坏死的治疗进展

股骨头坏死（ONFH）是一种进展性和致残性疾病,保存自身股骨头是临床治疗所追求的最理想目标,早中期的治疗方案主要采用非手术疗法和保髋的姑息性手术,目前为止还没有一种治疗方法能达到理想的治疗效果。近年来,骨髓间充质于细胞（MSCs）移植治疗ONFH是目前研究热点之一,有望成为一种有效的治疗方法,晚期行人工髋关节置换术是唯一的和最佳的选择。因此,早期诊断,采用综合性治疗方案保全自身髋关节是治疗本病的主要方向。     

新媒体研究述评及其心理学研究取向

新媒体的横空出世,对人们的生活带来极大影响。针对新媒体自身的一些问题及其影响,国内外进行了一系列研究。在综观相关研究成果基础上,介绍了新媒体的内涵与外延、特征及新媒体时代的起始时间,并主要介绍了新媒体的研究焦点,包括新媒体对人们生活方式及生活质量的影响,影响人们对新媒体态度及行为背后的心理因素分析。最后,在综合评价已有研究的基础上,提出应进一步加强新媒体的心理学研究取向,同时指出新媒体研究问题的具体深入化、方法的多元化及研究的本土化是未来的研究趋向。     

要重视慢性乙型肝炎的抗病毒治疗

慢性乙型肝炎是我国常见的慢性传染病之一,严重危害人民健康.围绕着乙型肝炎的防治,带来巨大的经济负担,已成为不可忽视的社会问题.在慢性乙型肝炎-肝硬化-HCC的发生发展过程中,HBV病毒载量起着重要的作用,抗病毒治疗是目前治疗慢性乙型肝炎的有效手段.因此,要重视和规范抗病毒治疗.     

Less is better: when low-value options are valued more highly than high-value options

This research demonstrates a less-is-better effect in three contexts: (1) a person giving a $45 scarf as a gift was perceived to be more generous than one giving a $55 coat; (2) an overfilled ice cream serving with 7 oz of ice cream was valued more than an underfilled serving with 8 oz of ice cream; (3) a dinnerware set with 24 intact pieces was judged more favourably than one with 31 intact pieces (including the same 24) plus a few broken ones. This less-is-better effect occurred only when the options were evaluated separately, and reversed itself when the options were juxtaposed. These results are explained in terms of the evaluability hypothesis, which states that separate evaluations of objects are often influenced by attributes which are easy to evaluate rather than by those which are important. © 1998 John Wiley & Sons, Ltd.     

Sharing Attention to Toys: Adolescent Mother–Toddler versus Adult Mother–Toddler Dyads

This study examined whether there were differences in the joint attention behaviours of adolescent mothers and toddlers and adult mothers and toddlers. The timing of mothers' attention-directing behaviours (i.e. maintaining, introducing and redirecting) as well as the specific behaviours (i.e. showing, offering and demon-strating toy) they used to direct their toddlers' attention to toys were observed. The observers also coded the specific joint attention behaviours that the toddlers used. The findings showed that the adolescent mothers redirected their toddlers' attention away from a toy they were interested in to a different toy more often and used fewer introducing behaviours than the adult mothers. Toddler age was also inversely related to mothers' redirecting behaviour. The results also indicated that the adolescent mothers demonstrated toys and interfered with their toddlers' ongoing play behaviour more frequently than the adult mothers. Toddler age was also inversely related to the frequency with which both groups of mothers demonstrated toys and positively related to the frequency with which mothers showed toys. The toddlers born to the adolescent mothers showed fewer social initiations and a higher frequency of non-verbal responses than the toddlers born to the adult mothers. Toddler age was negatively related to the frequency of non-verbal responses.